Let's compare the strength of titanium bolts, a Chinese cheap bolt, and a bolt used in the space industry
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Its not that titanium is going to hold that much more tonnage. It's that it'll hold the same tonnage while being half the weight of steel
@billyc2572 Жыл бұрын
Bingo
@brendontompa-clinch2306 Жыл бұрын
💯
@JayRSwan Жыл бұрын
Probably would have been the choice of armor for the ultra ultra rich if gunpowder was never invented.
@helium-379 Жыл бұрын
Or it could work even better as a mele weapon due to its lighweight characteristics.
@helium-379 Жыл бұрын
@@helium-379 Titanium doesn't hold an edge well. Its too soft for edged weapons, steel in this regard is better in everything except weight
@user-cd5fm3hh9k Жыл бұрын
It would've helped if at the end of this video you put up a chart or listing ranking the various bolt types in both shear off strength and linear pull strength, from best to worst, along with all of the associated failure values so we could study and compare all of the results all together, side by side in a list form for at least 30 seconds or so.
@JoeJ-8282 Жыл бұрын
This.
@ctdieselnut Жыл бұрын
Agreed..
@ggale2721 Жыл бұрын
No lo puede hacer porque no es la forma correcta de hacer ensayos de rotura de materiales; incluso las maquinas especificas a tal fin realizan la curva carga/deformacion/rotura
@sergioguiguet Жыл бұрын
Russia has the best titanium in the world... what they use on their spacecraft is the best of that best. The Soviets at one point had a whole giant vacuum fabrication facility to make titanium submarine hulls... it was a giant waste of time/resources but the engineering & fabricating processes still make them the best in the world (like Taiwan with chip production... wherein the most bleeding edge becomes almost Guild Master/Alchemist that can only be reproduced within those labs by those masters who pass on this unlearnable aspect to the head apprentices.) Same reason why everything collapsed in America cause those original labs/fabrication facilities with those old masters were shut down and they have to be essentially built from the ground up again
@nationalsocialism3504 Жыл бұрын
This so can some do that for us in the comment section
@GraniteInTheFace Жыл бұрын
In a few tests you can see the head of the bolt moving well before any yield, meaning bolt has not been properly torqued. Stresses accumulate differently when you have combined stresses and strains. It is always important to torque to specification. As a design engineer we were instructed to avoid putting bolts in single shear or shear at all. Shear stress in steel is traditionally lower than tensile yield strength. Some preferred practices were not being used in these tests.
@yelyab110 ай бұрын
Exactly which makes the tests pretty much useless..
@OUTDOORS555 ай бұрын
Glad that someone else noticed that 😮 You should always double check everything especially if you get a result you didn’t expect, make sure that it wasn’t a fault of your testing.
@justinhoward14065 ай бұрын
There are definitely methods ASTM ! I believe it was American Standards Testing Materials
@dannyball25034 ай бұрын
Bolts are not designed to be used in shear, that’s what pins are for. If they do get used in shear, they should be used in a double shear at the minimum and only the unthreaded portion of the fastener otherwise the bolt will fail at the small diameter in the bottom of the thread root.
@skullfracture23 ай бұрын
@@skullfracture2exactly
@idontwantacallsign2 ай бұрын
For any accident investigators out there, it might be interesting if you showed a magnified image the bolt surface after the sheer and tear failures.
@jasonarthur6602 Жыл бұрын
way back now but one of the things they taught new crew chiefs going into the US military was the different forces applied to fasteners, structural components and what those forces look like in action.
@Enonymouse_ Жыл бұрын
Every technology lab has extra equipment for pulling or shearing forces and doesn't play in the garage with old press lol these are standard tests in the industry
@bigdevil73 Жыл бұрын
*shear
@teeanahera89496 ай бұрын
Would also like to see how much each one costs.
@TellenJonesАй бұрын
My biggest criticism is that you kept mixing up the comparative values on the screen. For example at the end you tested the Chinese titanium then put up the value for the grade 8.8 bolt but labeled it Titanium for Spaceship. Then again when you tested the 12.9 bolt you put up a different value but labeled it Titanium for Spaceship again.
@1234567890CAB Жыл бұрын
maybe he just made a mistake?
@mrdot1126 Жыл бұрын
Yoooo was confuzzled too man
@williamkiss-reynolds1530 Жыл бұрын
Agree, it's a bit chaotic.
@rixogtr Жыл бұрын
Same observation... Ruins the video for me. Still fun to watch tho
@B4Astudios Жыл бұрын
Yes. It was extremely confusing.
@khalid969 Жыл бұрын
Nice job setting up the rig for your tensile strength test. Two things would’ve been nice to see: 1) during the sheer test, that the initial loading for each bolt was uniform. You could’ve done this with a torque wrench. 2) also very much would’ve like to have seen a close-up shot of the broken surface
@marshallwilliams4054 Жыл бұрын
Exactly. The shear strength of the bolt and 2 components is related to the clamping force
@janeblogs324 Жыл бұрын
Idk if the thread pitch was even the same. Same torque value to to bolts with different thread pitch results in different clamping force.
@thedarkmage7373 Жыл бұрын
@@thedarkmage7373 I didn’t even pay attention to that. Valid point.
@marshallwilliams4054 Жыл бұрын
Project Farm vibes from this comment
@AllenMemeson Жыл бұрын
Actually you'd also want a test with their rated torque for each class. Over or under torquing per the material would give incorrect results
@ObservationofLimits Жыл бұрын
Worked for a foundry that produces areospace/medical titanium parts. Some of the suppliers where chinese, they produce good materials. Only issue with the cheaper bolt is the coloring, it indicated the presence on alphacase on the surface of the parts. Alphacase is very brittle so it cause problems for cyclic loads overtime (small cracks will form and weaken the part). Alphacase is formed when titanium is heated since it reacts with oxigen. Alphacase needs to be etched off the surface using hf acid for a quality part, the coloring indicates that the etching process was not properly done. Hope this info helps/clarifies for someone.
@vincenttrottier6053 Жыл бұрын
Both of these bolts are Class 5.
@MarineScoutSniper14 күн бұрын
"Do not repeat at home". Thanks for the warning, I might have been tempted to try this on the industrial hydraulic press I happen to have lying around 😂
@nickback6294 Жыл бұрын
Ha, agreed, if I had a hydraulic press and load cells this is exactly wghat I would be doing at home!
@bigdarbs192 ай бұрын
You need to torque the bolts. In the sheer test friction of the plates plays a huge part in the strength.
@RickyLee53 Жыл бұрын
Came here to mention this
@mezodani Жыл бұрын
Exactly…
@michaelaguilar3601 Жыл бұрын
Agree, came to say the same.
@shardlake Жыл бұрын
It's not friction, it's applying the proper preload for the fastener to perform as it's designed to. That said this entire "test" has so many sloppy variable that it can hardly be considered reliable. XD
@keilet Жыл бұрын
...so does the wallowing out of the holes after each test putting the different bolts in different shear and bending situations...OK vid for a goofy comparison but must list the type and grade of the bolts correctly - so thumbs down
@wokewokerman5280 Жыл бұрын
For people wondering why cheap Chinese bolts might be stronger than the space bolts - the main attribute of a space bolt would be its weight over its strength. The bolt would rate just as strong as it requires to avoid being disproportionately strong for its needs, thus: heavier than it could have otherwise been. You can bet the bolts were manufactured exactly within strength capability witin specific thresholds, in order to allow for as much enhanced weight reduction property as possible.
@Postghost Жыл бұрын
This is the absolute correct answer. I've worked with aerospace stuff and everything boils down to the exact required strength to weight ratio. No overkill can be afforded with them otherwise they wouldn't make it off the ground. Everything is calculated down to the nm
@tslim250 Жыл бұрын
They were weighted at the beginning of the video FYI
@mengguangwang Жыл бұрын
In other words for construction builds Steel whilst having Chinese Titanium bolts at vital parts is beyond plenty
@Bundalaba Жыл бұрын
You answered my unposted question very well, and I appreciate that. Thank you!
@davek88 Жыл бұрын
@@mengguangwang not the chinese bolt.
@williammeek4078 Жыл бұрын
Thread pitch, bolt diameter, the torque used to assemble your fixture, the exact alloy of each bolt , the rigidity of the testing fixture, etc. all come into play here. I guess what I'm saying is that it would have been nice to have some more control metrics used and displayed in your video (besides bolt mass and general material type).
@mahsheenman Жыл бұрын
I agree! A fine thread pitch allows for more thread contact and in turn more strength.
@GTOGregory7 ай бұрын
Also depends on where the point of failure is. Most likely at the threads. Finer threads aren't as deep therefore cross-sectional area will be larger.
@karlm95844 ай бұрын
with 6.6mil views this video could have made over $30,000. they probably don't care
@krusher7417 күн бұрын
@krusher74 true but I commented when there was more like 600 views...
@mahsheenman17 күн бұрын
I remember QC testing 12.9 fasteners in the tensile test, the machine would hop about 4 inches off the ground when it would break and it was a damn heavy machine. Another test QC would do was tap a 1/4 plate with multiple holes and screw bolts and screws into it and torque them down to a certain over loaded level and leave them for a week, sometimes the head would pop off and shoot across the room.
@stealthimaster8583 Жыл бұрын
I work on metal stamping dies, and we use 12.9 bolts as standard. I've used some supertanium bolts and have never had one fail, but one of the key issues to consider is the diameter of the fastener being used. Often, the best solution is stepping up to the next size bigger. When breakage occurs the designed fasteners might not have been enough for the load Really like this type of video, a final chart on a dry erase board comparing results, would've been nice.
@johnmoser2689 Жыл бұрын
That’s quite possibly the longest sentence I’ve ever read.
@somuchbs6008 Жыл бұрын
@@somuchbs6008 I'm not a wordsmith sorry if it wasn't English teacher approved Life is too short for all that damn punctuation
@johnmoser2689 Жыл бұрын
I have used inconel X-750 for a forging die ejection pin mechanism. All imported from China. It worked beautifully. Toolig lasted for nearly 2 years in production. The pin it self was 16 mm in dia and 150 mm in lenght. Die operated at 500 C. had cooling and heating cycles too. Best part, the pin was 1/4 the price an American company quoted me.
@richardv9648 Жыл бұрын
Yes, I'm working as an Engineering staff, and we design machines, and yes in drawings, the plans, we use diameter 7 for a bolt of M6 for the same issue you've stated
@jonathanorendain9605 Жыл бұрын
It's a useful point that instead of going up a fastener grade simply go to the next diamater. It's pretty much an axiom saying that if breakage occurs then the fasteners were not enough for the load ;)
@mattpatt Жыл бұрын
Bravo!!! Class 12.9 bolts are often used when prolonged use under harsh loads risks stretching the bolt rather than breaking it which is why very specific torque settings are required, A good example is Cylinder Head bolts on an engine that need to expand/contract and still remain tight avoiding cylinder head failure :-))
@markanthonystringfellow3923 Жыл бұрын
Days of 12.9 class bolts on cylinder heads are gone. Most cars of current century use 8.8 class bolts for cylinder heads. Torque spec is close to yield limit of bolt, so bolt acts as a spring and provides more consistent clamping force under different temperature related expansions of cylinder head
@el_kuks Жыл бұрын
@@el_kuks "Stretch bolts" that aren't supposed to be re-used.
@dancarter482 Жыл бұрын
If a bolt is stretched it is a failure and should be binned. It will no longer have much strength.
@teeanahera89496 ай бұрын
This content wasn’t meant to show a “fair” comparison apples to apples. It was “engineered” to showcase Chinese quality and change perceptions of Chinese metal parts being of inferior quality. This is a PR piece.
@bobkenehan7541 Жыл бұрын
Would second an interest in seeing the failed bolt surfaces - a ductile failure of the bolt compared to striping the thread is an interesting comparison. I'd also be very interested to see polished and etched microsections - how do the compositions and heat treatments (obviously, if any) vary? Even the quality of the machining on the thread would be an interesting factor, though I'll admit that's probably too much effort for a KZhead video.
@MrDiscountNinja Жыл бұрын
Haven't read all the comments but some bolts have threads at the gap between the two plates and some are solid, no threads. Threads will weaken the bolt in shear at the thread compared with the unthreaded shaft of the bolt.
@schsch2390 Жыл бұрын
I came here to leave a similar comment but found yet again, great minds think alike.
@kamerslammer Жыл бұрын
The bolts that have a full length thread are called set screws, bolts are partially threaded
@dharveyftw7349 Жыл бұрын
The shear test should be done with a flat peace of steel between 2 supports, torqued with A torque wrench. This will give you 2 shear areas, but no momentum on the screws. Also the friction between the plates will be identical fir comparison. I believe in the first test the chinese titanium screw showed a better value because it was not only applied with shear force, but also with tension because the plate was already pushed away…
@MAd_TV Жыл бұрын
for sure
@marceloshimomura5000 Жыл бұрын
He also used the threaded portion of the fastener which is slightly smaller and weaker
@Toxic_rnr Жыл бұрын
Truly unfair comparison. Space bolt had washers (clearly softer metal) and a nut adding leverage against bolt. Fastening nut should be flush as with chinese titanium bolt.
@decrepit9357 Жыл бұрын
My father was an commercial aircraft mechanic and salvaged a lot of the fasteners that were replaced. We used them on various mechanical projects and automotive uses like exhaust bolts. Whatever materials they were made of, they never rusted or stripped, super strong.
@egoequus626310 ай бұрын
A bloke I knew worked for Scania (trucks) and he kept some bolts and stuff. You could put a spanner on those and screw them into the appropriate sized hole in steel and not bother tapping a thread first! They don’t rust and you can’t weld them (accidentally got too close to one bolt but the weld didn’t take).
@teeanahera89496 ай бұрын
... a* commercial airdraft mechanic
@einundsiebenziger54882 ай бұрын
@@einundsiebenziger5488 Good thing you chimed in. People must have been so confused by my typo.
@egoequus62632 ай бұрын
@egoequus6263 i was very confused I'm glad he explained what you were trying to type
@coloradodirtbike593019 күн бұрын
I have a question about those shear tests. Did you torque them to spec for specific steel or titanium and have the same torque specs for each? Only asking because the bolts are much stronger when torqued when applying to sheer strength. I believe tension strength is improved as well but I haven’t specifically looked into that in the past.
@Annon896 ай бұрын
Would be great a sheet at the end of the video showing all the results. It's easyer to compare it. Thanks for the video!
@javierpiles5833 Жыл бұрын
Thought about it too.
@TransAmDrifter Жыл бұрын
It’s just satisfying seeing seemingly indestructible stuff break.
@rdklarnet4120 Жыл бұрын
Nothing in this video is purported to be indestructible. You need a better grasp on reality.
@East-somewhere Жыл бұрын
@@East-somewhere i just claimed they were 'seemingly' indestructible...nothing is indestructible...there is always something bigger, and stronger, or smaller and more pervasive...i prefer to not grasp reality at all since the fundamental state of reality is to always change.
@rdklarnet4120 Жыл бұрын
@@East-somewhere You need a better grasp on a personality.
@tgnuma2 Жыл бұрын
@@East-somewhere nice gaslight. my mang said "seemingly." dont ever invite this edgy clown to a party.
@professorgoat1099 Жыл бұрын
There are many grades of Titanium. We have no idea what is being tested here.
@Darkforces8179 ай бұрын
He is testing from what the label says., what’s the best grade …………..?
@Dangerously_Satisfying15 күн бұрын
These bolts are Class 5.
@MarineScoutSniper14 күн бұрын
I agree with all the posters below who said put up a final chart with all the results side by side.
@todd5082 Жыл бұрын
You shouldn't forget that titanium alloy was designed to stay stable under high and low temperatures when most types of steel become more brittle or plastic.
@nick_vash Жыл бұрын
Also strength to weight ratio
@thedarkmage7373 Жыл бұрын
And corrosion resistance.
@someguy5035 Жыл бұрын
I think that when you do your tests you should get a torque wrench and torque the bolts to a specific torque. Because it may make a difference if the bolts are not torqued the same. That would make your video's more accurate.
@cruzsanchez3647 Жыл бұрын
And match thread pitch
@thedarkmage7373 Жыл бұрын
Torque doesn't appear to be necessary since they're pulling against a nut and the threads, not 2 flush plates.
@GrantOakes Жыл бұрын
I appreciate your test. It would be great to test three different ARP bolts. The 8740, the 2000 and the L19. It would not be comparing the ARP bolts to other kinds or brands, so maybe the legalities are reduced.
@GTOGregory7 ай бұрын
Would be cool to see this done with better controls. All bolts same diameter. Same threads. Torqued to the same spec or maybe “optimal” spec for the given material.
@josephc1148 Жыл бұрын
Why am I watching this at all? It is so satisfying and I don't know why.
@tmvideoproduktionen Жыл бұрын
The torque in to the bolt is a very important variable to the resistence of your assembly. A 10.9 class bolt may resist much less than a 8.8 (same dimensions) if not enough torque is given.
@alleycat19897 Жыл бұрын
Thx, just wanted to write that! That's a very crucial factor, as well as the surface condition of the connecting plates.
@xistsixt Жыл бұрын
I doubt that would matter. this seems like the type of guy that didn't even match thread pitch.
@thedarkmage7373 Жыл бұрын
Why titanium for spaceship is weaker than aliexpress bolts?
@HeadHunter-cu7ywАй бұрын
Thats not how titanium works, titanium is lighter than steel, but similar strength, the aliexpress bolts arent oure titanium and have other alloys in them to make it cheaper to produce, but they are about the same weigh as steel, not titanium, making them useless
@suhy986119 күн бұрын
Probably optimized for weight VS optimized for strength
@MrWizardjr916 күн бұрын
Nasa still thinks light "travels". What do expect from them? They need a bit more Einstien to wake up.
@Ordinal_Yoda9 күн бұрын
Amazing to see the strengths of those bolts, but would of been nice to have the results listed.
@spudnickuk11 ай бұрын
Wow. AliExpress bolts exceeded my expectations. Space bolt is lightweight not entirely titanium but a composite or alloy
@tenshinty2231 Жыл бұрын
not a true test, need to have the same spec, same weight, etc...
@callmejon Жыл бұрын
@@callmejon 😵💫😵💫😵💫😵💫
@jayjaysylvester560 Жыл бұрын
Yep, grade 5 or Ti6AL4V
@SimonLandryMusic7 ай бұрын
Don't trust this channel's results. The format is crap
@macbook8027 ай бұрын
Shocked that the AliExpress bolts performed as well as they did. I figured they'd be filled with rabbit turds or something (like fake cigarettes a few years ago).
@rimfire2642 Жыл бұрын
@Baldspot How old are you ? 100 ? 😅
@NaturalBBler Жыл бұрын
@Baldspot My dad was born in the 50's and he never heard that "Made in Japan" meant junk. Although you are right, the West underestimate China way too much.
@PeterBee911 Жыл бұрын
I think that quality itself isn't necessarily the issue when the product in fact matches the description of the seller on AliExpress. The problem is that regulation on such platforms is often bad, so there is no guarantee that a titanium bolt is indeed made of 100% titanium.
@TempAccount358 Жыл бұрын
Wow what a surprise that fatmericans are xenophobic racist twats.
@SeanONilbud Жыл бұрын
@@TempAccount358 That's true that many specifications are overrated in a wide variety of products sold there.
@guillermoflores7030 Жыл бұрын
Using a huge spacer on the space bolt made a huge variable. I’d get full threaded bolts same size and repeat torqued to say 40ftlbs.
@johnkrongos45128 ай бұрын
These relatively tiny bolts are incredibly strong is what I get from this video. Even the smaller ones take almost 2 metric tons of force to break. That’s about the weight of a mid sized pickup truck like a Chevy Colorado or Toyota Tacoma.
@gregrowe1168 Жыл бұрын
The tear test is known as tensile strength, as in under tension. You could have also done a bend test along with the shear test.
@timfeeley714-25 Жыл бұрын
I am guessing titanium would suck literal engineering balls in that bend test. It would take PLENTY to bend it but it wont bend much
@jeanvanrooyen6004 Жыл бұрын
От степени затяжки резьбы много зависит, динамометрический ключ нужен.
@user-im2tk4mr6f Жыл бұрын
ты прав. Привет из Бразилии
@andersonleal5832 Жыл бұрын
if you're wondering why titanium made in china has more shearing capacity, the reason is because it's straining unlike the other one. This is probably because of the faulty testing equipment. The bracket isn't supposed to let the bolt rotate but the Chinese bolt rotated a bit. Edit: Rewatched the whole thing again. Might just be the bolt tolerances allowing the nut to move a bit causing the loose bolt connection under shearing stress
@channelname10yearsago6815 күн бұрын
You should hire a new editor
@NotaRealScientist Жыл бұрын
Just wondering, what is the rate of metal fatigue for both alloys? The weight and that should be the biggest factors for choice using it in a space craft
@AwoudeX Жыл бұрын
Well, weight is very important too when you want to make flying or space screws :)
@technics6215 Жыл бұрын
More test like this please😉
@MsLiextreme Жыл бұрын
The only downside to Ti bolts is that you need cadmium free tools to work on the Ti parts or else the cadmium corrodes the Ti. I worked at Viking Metallurical Corp, they make Ti jet engine parts and learned about this gift from space.
@MichaelLombardo-rx8gv Жыл бұрын
I would have liked to see the same tests with you torquing them to the same spec. With and without anti seize or another thread prep. Very cool though.
@2A.Isaach5 ай бұрын
In the first series, that hole in the shear plate just about had to be picking up a rounded edge .
@rolandtamaccio3285 Жыл бұрын
Great fun to watch. Thanks for such an interesting comparison of the strength of bolts made of different metals both by way of lateral tension and shear force
@Hari-Singh Жыл бұрын
Space bolts look to have an MSO2 coating, whilst the Chinese version have an anodised finished. This wouls prevent hauling and ensure that when torquing the correct preload is induced. No lubrication can weekend the bolts ability to take a load.
@dash-cae9618 Жыл бұрын
Thank you. I came across this video as I was researching which bolt is best to hold the fartcan exhaust on my Honda civic. 👍🏽
@DIOcelot Жыл бұрын
When watching an hydraulic press working is more interesting than 90% of the KZhead content these day...
@cristianmoyaromero1329 Жыл бұрын
95%
@someguy5035 Жыл бұрын
Never go into space with just one bolt.
@bikebasket9594 Жыл бұрын
At the end can you list the results please. Also, what's with the music, starting ones were so ominous?
@nyxawesome94097 ай бұрын
I use the Chitanium bolts for the DB killer on my bike. The T30 bolts show no signs of strippage whereas the 4mm hex bolts that they replaced where dangerously close to stripping after two track days.
@David..6 ай бұрын
2:28 you can see light/gap under the head of the bolt. You need a washer or a chamfered edge. The head of the bolt is being point loaded, a big no no
@janeblogs324 Жыл бұрын
I really feel the pressure watching stuff like this. Pressing matters...
@sekovittol3124 Жыл бұрын
I felt like it was a weight off my shoulders to be honest!
@skylined5534 Жыл бұрын
I like the disclaimer at the beginning "do not try this at home", because we've all got a ten ton+ stress tester at home?🤣🤣🤣🤣🤣🤣🤣
@Billy-No-Mates-ol8nx13 күн бұрын
I've got sixteen bolts and two titanium plates holding me together. No complaints about said material.
@DavidElse-hm7xoКүн бұрын
A better comparison would be to use two bolts of equal weight rather than the same size. That would show the relative strength vs weight. Titanium has an advantage in being lighter and does not rust, even in saltwater.
@ivandenisovich6005 Жыл бұрын
Some values worth taking into account: oxidative stress, heat stress and how both of those affect elastic and plastic deformation. I imagine the space use titanium can handle both values better than the cheap titanium as that is the environment they need to be designed to tolerate. (High G stress and atmospheric friction).
@burakoshimazaki Жыл бұрын
High G stress and atmospheric friction HAVE ZERO to do with anything regarding these bolts. In fact high G stress isnt even a thing regarding mechanical fasteners. Its got to do with a persons ability to withstand high G's. Atmospheric friction..lmfao you dug deep for that nonsense. We dont engineer nor test bolts factors that do not apply. Ask me how i know.
@IOD_ Жыл бұрын
@@IOD_I'm curkous how do you know?
@arstgera9 ай бұрын
I like the way you set up that shear test!
@thunderamu95439 ай бұрын
The Chinese bolts sold on ebay/ aliexpress are normally grade 5 which is 6% aluminum and 4% vanadium. The chinese also sell the grade 2 titanium bolts. Which is not an alloy and is dull grey color.
@CBXrr17 күн бұрын
Honestly, the most shocking thing was that a space shuttle has flat head hardware.
@999benhonda Жыл бұрын
i think it is used due to it has less air restriction.
@milkisgood4us Жыл бұрын
In the picture of the clip was no space shuttle but the soviet version.
@mazchen Жыл бұрын
I think it's not the head type but the grade of titanium used. Regardless of what the the tightening interface is it's more that this will be the same material type.
@skylined5534 Жыл бұрын
Actually the Allie bolts did quite well considering the price
@selekolela8805 Жыл бұрын
Hmmm so.. different bolts of different materials, size, width and torque applied to will have different strenghts. How accurate this test was ! I am amazed !
@Nico_Dica Жыл бұрын
This is what Dad did when he worked on the Titan IV rocket platform at Cape Canaveral. He was responsible for the stress analysis of the bolts for the launch assembly. The Cassini spacecraft was one of his projects.
@membershipmovement5 ай бұрын
You should have used a torque wrench for this experiment, in order to compare fairly these bolts. When tightened adequetly, all the cutting force turns to traction tensions. Failing to evenly torque bolts, could lead to uneven results
@ChuPiGroSo678 Жыл бұрын
and if your measuring things equally, using a spacer changes the stretch of the bolt .
@dasmith1723 Жыл бұрын
Been heard titanium is weak on impact and good at handling high heat, so the test result is more than I expected. And I wonder, doesn’t the manufacturer give the standard, of how much force the bolts are designed to handle? …
@minercraftal Жыл бұрын
Yeah, this guy is just checking the numbers. Also those numbers are what the manufacturers are sure their product can handle, not what it will.
@SoMuchFacepalm Жыл бұрын
@@SoMuchFacepalm does these numbers indicate the tons it’s purposed to handle? I don’t really get it, not enough information
@minercraftal Жыл бұрын
@@minercraftal pretty sure he's using kilos in the counter in the corner.
@SoMuchFacepalm Жыл бұрын
I have Scheuermann’s disease and needed my spine fused. 20 screws 2 rods and 2 connectors at top and bottom. They’re about the length shown 3” or so.
@ristube33194 ай бұрын
Would be nice to see a chart comparing strength to weight for all of them. Also, not torqueing them all down identically skews the data.
@JimPekarek5 ай бұрын
А условие одинаковой осевой затяжки деталек при тесте на "срез/смятие" в отверстии соблел? нет тогда по деталям машин садись 2, усилие затяжки повлияет на силы трения которые надо будет сначала "преодолеть" так еще и пары трения титан сталь не равны между собой по умолчанию, потому что тест на растяжение показал совсем другой запас прочности + гайки тоже надо брать равного класса, чтоб смятие витков было аналогичным с болтом, а то будет как с 12.9 - витки гайки остались на "дико каленом" болту, которые вообще запрещены в машиностроении, так как "лопаются" а не тянутся в случае разрушения, а так для обывателя "красиво", спасибо за ролики)
@sergi_ksv5241 Жыл бұрын
12 й класс закален и подвержен определенному отпуску, такой болт не хрупкий, но имеет повышенный предел текучести (0.9) относительно сопротивлению на разрыв, и сталь в таких болтах как минимум 40Х, а это уже не ст3.
@chlonitazene Жыл бұрын
@@chlonitazene Eso es verdad. Bien visto señorita.
@KevinnSunyer143 Жыл бұрын
Of course they use flathead screws on a spaceship. Those won't ever come out.
@justinwatkins3500 Жыл бұрын
😅🤣😂🤣😅
@garrykennedy5484 Жыл бұрын
No more likely than any other
@andrewholdaway813 Жыл бұрын
@@andrewholdaway813 you've obviously never used a flathead screwdriver on flathead screws before.
@justinwatkins3500 Жыл бұрын
@@justinwatkins3500 Just trying to find out wth you meant. Maybe they don't want them to be removed?
@andrewholdaway813 Жыл бұрын
Yeah, next best thing to security head bolts.. especially if the loctite them with the green loctite by mistake.
@SPHYNX99752 Жыл бұрын
Early deformation of the cheap titanium bolts shifts the force from shear to more tensile, appearing to make it stronger.
@mathijszwier6026 Жыл бұрын
Not only is weight reduction considered, also the strength characteristics at the extreme temperatures regarding outer space and re-entry. Grade 8.8 bolts become very soft at only 800-900 degrees F., Very brittle below -100 F.
@zacbranham7772 Жыл бұрын
Can we just appreciate how strong all the materials are? I mean you can pretty much hang an SUV on one of those bolts and they are not even some big and thick ones.
@brudel001 Жыл бұрын
The beauty of steel and alloy products are their tensile strength. If you could hold onto it, several people could hang from a coke can, though one heavy foot is enough to crush it. Of course, concrete is the opposite, which is why they are a brilliant construction product when combined.
@ChrisRWilcox Жыл бұрын
Genuine titanium is capable of withstanding MUCH more pressure and load. Processing titanium is a challenging process.
@masyakka Жыл бұрын
High quality steel with the right hardness is still stronger than the best titanium alloy, titanium is used for weight reduction and corrosion resistance without giving up to much when it comes to strength.
@andreasfjellborg1810 Жыл бұрын
@@andreasfjellborg1810 You are right. my boss at a titanium forging plant used to say "CP-Titanium is only as good as 316 Stainless in strenght but with much lower weight. There are stronger metals, such as nickle alloys that will beat titanium any day in strenght.
@richardv9648 Жыл бұрын
Needed to do one more, a bolt made by arp with their strongest alloy.
@Phuong_Nguyen_7 ай бұрын
Looking at strength numbers can tell a small part of the story. Stress vs strain curves would be much more interesting to investigate.
@BrandonBruman11 ай бұрын
Crazy how strong the Chinesium actually was
@Deemah.cr3 Жыл бұрын
Not all titanium bolts are 100% titanium.. they are an alloy and pure titanium is very malleable (soft).
@johnh8615 Жыл бұрын
Ti CP Ti 3Al 2.5V Ti 6Al 5V
@fontrogetcyprien681 Жыл бұрын
@@fontrogetcyprien681 Ti6AL4V
@davidcheung8595 Жыл бұрын
No titanium is pretty hard for a pure metal but it's properties are bad. Kinda brittle.
@freevipservers Жыл бұрын
Don't trust this channel's results. The format is crap
@macbook8027 ай бұрын
only problem was the sheer point on space shuttle bolt was more than double the other bolts due to shallow thread length had to space with another nut and a bunch of washers pushing sheer point way out effectively making a fulcrum
@birdwah017 ай бұрын
Other factors to consider is that this is a room temperature test. Titanium performs better at high temperatures than most steels do, the intended use is another factor in decided which material is appropriate. Titanium is also less susceptible to most types of corrosion than steel is.
@theblackbear2116 ай бұрын
Don't just compare values of force applied on each bolt. They can be of different cross sectional area. The strength value should be in psi (pounds per square inch of cross section area) of shear, tension or compression.
@arttellama2408 Жыл бұрын
not in most if the world! kPa?
@cluasa Жыл бұрын
Nobody with half a working brain cell measures anything in PSI...
These are the kind of hydraulic tests we need as opposed to crushing precious food and destroying environmentally hazardous stuff
@codename3299Ай бұрын
So you’re telling my Chinese titanium bolts I have for decorative purpose are these strong ? 😂
@brunovazquez16 ай бұрын
Самые крепкие болты, которые я встречал - это на буровых каретках "Sandvik". На них написано 14,9.
@user-ji3do2ye4f Жыл бұрын
6:31 this is not a proper test for bolt tensile strength. You used a thin section but that is not intended to hold loads for tension. From the video you can see that the threads are sheared. When you have a booted connection in tension, the threads and nut should never fail. Only the bolt shank (grip) should fail. Again, you need to use a proper tension but for this test. In the following segment you realized it and then used a different nut and the test right broke. It needs a bit of explanation to the audience.
@ironqqq Жыл бұрын
You did a solid weld job on the three metal blocks
@DirtTrackRacing410 Жыл бұрын
Years ago a surgeon in Hawaii found out right before surgery that he didn’t have the titanium rods he needed. He went to the auto parts store and bought titanium screwdrivers and hacked off the handles. The rods he inserted ultimately failed and after the next surgery to replace them the doctor tossed the inferior rods but a nurse retrieved them and turned them over to authorities. The patient was very elderly. I remember thinking that this guy went through too much to get to the position of a surgeon and then just shanked it. Like is a race to see if you die of natural causes before you really screw up something.
@ducknorris2337 ай бұрын
I think people are over analyzing this video. If you were designing something that needed critical fastener specs, you would most likely look at some fastener data sheets and use fastener hardware that satisfied your particular needs, such as tensile strength, shear strength, fatigue ratings, high / low temp specs, etc... possible even a magnetic / paramagnetic ratings. I think the video is fine, 99% of us watching are probly just goofing off wasting time here anyways. I doubt that anyone watching this video is using it to decide if they wanna use these bolts on their space shuttle. I'm still kinda surprised at the chinese hardware performance.
@oldolfmann8927 Жыл бұрын
Steel alloys are stronger than Titanium, it's just that Titanium has good strength-to-weight ratio. Also, strength does not omly depend on the metal used. It also depends on the manufacturing method (cast, forged, powder-metal forged, machined forged billet, sintered, etc.)
@sepg50849 ай бұрын
For any shear or tension yield failure tests you need the area of material. force/area gives reliable data
@rodney48911 ай бұрын
in first application it is critical to torque them the same - otherwise you can just estimate the shear force if you tighten those steel bits properly the main resisting force comes from the friction between those two, which is proportional to the torque on the bolt, after that you just snapping it - the pulling test is done much better, but the weak point is always the thread
@m4rkizАй бұрын
Hats off to you for taking a scientific approach. With all this expert advice in the comments, you'll be able to perfect your methods in no time and become the world's foremost testing and certification lab:-) Seriously, at least some of the advice is good, hope you take it impersonally instead of feeling kicked in the 'nads. In that spirit, I humbly suggest giving the bolts short names like "A," "B," "C," or Maui, Kush, Thai or something. My eyes aren't great and i kept missing the tests while trying to read. It would also remove some viewer bias. At the end of the video reveal what each label stands for along with a summary of the results.
@karlharvymarx2650 Жыл бұрын
Mother Fucker this was the most unscientific test I have ever seen. The dude didn't match thread pitch or applied torque equally along all tests. Know how a bolt works before testing them.
@thedarkmage7373 Жыл бұрын
Son, there are at least five grades of titanium. And space is certainly not one of them...
@techpriest4787 Жыл бұрын
Son, Not true. there are 26 grades. Plus multiple custom grades and alloy systems depending on the application. But 5 grades are basic available to the laymen.
@richardv9648 Жыл бұрын
Quite useful testing datas. Did you use M10 size bolts over there?
@vikas8757 Жыл бұрын
The last bolt gonna bring the house roof down but will stay intact lol
@lemonacidrounds729313 күн бұрын
Now the real question is, where did he get spacecraft bolts from :)
@mattt198654321 Жыл бұрын
pre-own Russian spacecraft
@h3dbopqux6ekvas98 Жыл бұрын
Aliexpress 😂
@bobsnabby2298 Жыл бұрын
Pieces of the Columbia shuttle.
@aquablue6301 Жыл бұрын
he is actually an alien
@paulosouza3369 Жыл бұрын
Next time you see a rocket exploding on the launchpad you will know.
@listerdave1240 Жыл бұрын
Now that's what I call... Under pressure... 🤣
@TheReelGamer1 Жыл бұрын
In the 60’s my dad worked for a company that produced fasteners and components for aerospace. Each and every piece had to be shot peened, magnafluxed, x-rayed, fail-tested and meticulously inspected under a stereo microscope… then personally signed off, every step of the way to ensure a tolerance as close to zero as humanly possible. It’s an expensive and labor intensive process…
@nigel9006 ай бұрын
And then NorskHydro goes and fakes thousands of tests over almost 20 years
@nicholasdenney13186 ай бұрын
@@nicholasdenney1318 I suppose, if they are Fakers.
@nigel9006 ай бұрын
Titanium is so light it almost feels like plastic like aluminum
Its not that titanium is going to hold that much more tonnage. It's that it'll hold the same tonnage while being half the weight of steel
Bingo
💯
Probably would have been the choice of armor for the ultra ultra rich if gunpowder was never invented.
Or it could work even better as a mele weapon due to its lighweight characteristics.
@@helium-379 Titanium doesn't hold an edge well. Its too soft for edged weapons, steel in this regard is better in everything except weight
It would've helped if at the end of this video you put up a chart or listing ranking the various bolt types in both shear off strength and linear pull strength, from best to worst, along with all of the associated failure values so we could study and compare all of the results all together, side by side in a list form for at least 30 seconds or so.
This.
Agreed..
No lo puede hacer porque no es la forma correcta de hacer ensayos de rotura de materiales; incluso las maquinas especificas a tal fin realizan la curva carga/deformacion/rotura
Russia has the best titanium in the world... what they use on their spacecraft is the best of that best. The Soviets at one point had a whole giant vacuum fabrication facility to make titanium submarine hulls... it was a giant waste of time/resources but the engineering & fabricating processes still make them the best in the world (like Taiwan with chip production... wherein the most bleeding edge becomes almost Guild Master/Alchemist that can only be reproduced within those labs by those masters who pass on this unlearnable aspect to the head apprentices.) Same reason why everything collapsed in America cause those original labs/fabrication facilities with those old masters were shut down and they have to be essentially built from the ground up again
This so can some do that for us in the comment section
In a few tests you can see the head of the bolt moving well before any yield, meaning bolt has not been properly torqued. Stresses accumulate differently when you have combined stresses and strains. It is always important to torque to specification. As a design engineer we were instructed to avoid putting bolts in single shear or shear at all. Shear stress in steel is traditionally lower than tensile yield strength. Some preferred practices were not being used in these tests.
Exactly which makes the tests pretty much useless..
Glad that someone else noticed that 😮 You should always double check everything especially if you get a result you didn’t expect, make sure that it wasn’t a fault of your testing.
There are definitely methods ASTM ! I believe it was American Standards Testing Materials
Bolts are not designed to be used in shear, that’s what pins are for. If they do get used in shear, they should be used in a double shear at the minimum and only the unthreaded portion of the fastener otherwise the bolt will fail at the small diameter in the bottom of the thread root.
@@skullfracture2exactly
For any accident investigators out there, it might be interesting if you showed a magnified image the bolt surface after the sheer and tear failures.
way back now but one of the things they taught new crew chiefs going into the US military was the different forces applied to fasteners, structural components and what those forces look like in action.
Every technology lab has extra equipment for pulling or shearing forces and doesn't play in the garage with old press lol these are standard tests in the industry
*shear
Would also like to see how much each one costs.
My biggest criticism is that you kept mixing up the comparative values on the screen. For example at the end you tested the Chinese titanium then put up the value for the grade 8.8 bolt but labeled it Titanium for Spaceship. Then again when you tested the 12.9 bolt you put up a different value but labeled it Titanium for Spaceship again.
maybe he just made a mistake?
Yoooo was confuzzled too man
Agree, it's a bit chaotic.
Same observation... Ruins the video for me. Still fun to watch tho
Yes. It was extremely confusing.
Nice job setting up the rig for your tensile strength test. Two things would’ve been nice to see: 1) during the sheer test, that the initial loading for each bolt was uniform. You could’ve done this with a torque wrench. 2) also very much would’ve like to have seen a close-up shot of the broken surface
Exactly. The shear strength of the bolt and 2 components is related to the clamping force
Idk if the thread pitch was even the same. Same torque value to to bolts with different thread pitch results in different clamping force.
@@thedarkmage7373 I didn’t even pay attention to that. Valid point.
Project Farm vibes from this comment
Actually you'd also want a test with their rated torque for each class. Over or under torquing per the material would give incorrect results
Worked for a foundry that produces areospace/medical titanium parts. Some of the suppliers where chinese, they produce good materials. Only issue with the cheaper bolt is the coloring, it indicated the presence on alphacase on the surface of the parts. Alphacase is very brittle so it cause problems for cyclic loads overtime (small cracks will form and weaken the part). Alphacase is formed when titanium is heated since it reacts with oxigen. Alphacase needs to be etched off the surface using hf acid for a quality part, the coloring indicates that the etching process was not properly done. Hope this info helps/clarifies for someone.
Both of these bolts are Class 5.
"Do not repeat at home". Thanks for the warning, I might have been tempted to try this on the industrial hydraulic press I happen to have lying around 😂
Ha, agreed, if I had a hydraulic press and load cells this is exactly wghat I would be doing at home!
You need to torque the bolts. In the sheer test friction of the plates plays a huge part in the strength.
Came here to mention this
Exactly…
Agree, came to say the same.
It's not friction, it's applying the proper preload for the fastener to perform as it's designed to. That said this entire "test" has so many sloppy variable that it can hardly be considered reliable. XD
...so does the wallowing out of the holes after each test putting the different bolts in different shear and bending situations...OK vid for a goofy comparison but must list the type and grade of the bolts correctly - so thumbs down
For people wondering why cheap Chinese bolts might be stronger than the space bolts - the main attribute of a space bolt would be its weight over its strength. The bolt would rate just as strong as it requires to avoid being disproportionately strong for its needs, thus: heavier than it could have otherwise been. You can bet the bolts were manufactured exactly within strength capability witin specific thresholds, in order to allow for as much enhanced weight reduction property as possible.
This is the absolute correct answer. I've worked with aerospace stuff and everything boils down to the exact required strength to weight ratio. No overkill can be afforded with them otherwise they wouldn't make it off the ground. Everything is calculated down to the nm
They were weighted at the beginning of the video FYI
In other words for construction builds Steel whilst having Chinese Titanium bolts at vital parts is beyond plenty
You answered my unposted question very well, and I appreciate that. Thank you!
@@mengguangwang not the chinese bolt.
Thread pitch, bolt diameter, the torque used to assemble your fixture, the exact alloy of each bolt , the rigidity of the testing fixture, etc. all come into play here. I guess what I'm saying is that it would have been nice to have some more control metrics used and displayed in your video (besides bolt mass and general material type).
I agree! A fine thread pitch allows for more thread contact and in turn more strength.
Also depends on where the point of failure is. Most likely at the threads. Finer threads aren't as deep therefore cross-sectional area will be larger.
with 6.6mil views this video could have made over $30,000. they probably don't care
@krusher74 true but I commented when there was more like 600 views...
I remember QC testing 12.9 fasteners in the tensile test, the machine would hop about 4 inches off the ground when it would break and it was a damn heavy machine. Another test QC would do was tap a 1/4 plate with multiple holes and screw bolts and screws into it and torque them down to a certain over loaded level and leave them for a week, sometimes the head would pop off and shoot across the room.
I work on metal stamping dies, and we use 12.9 bolts as standard. I've used some supertanium bolts and have never had one fail, but one of the key issues to consider is the diameter of the fastener being used. Often, the best solution is stepping up to the next size bigger. When breakage occurs the designed fasteners might not have been enough for the load Really like this type of video, a final chart on a dry erase board comparing results, would've been nice.
That’s quite possibly the longest sentence I’ve ever read.
@@somuchbs6008 I'm not a wordsmith sorry if it wasn't English teacher approved Life is too short for all that damn punctuation
I have used inconel X-750 for a forging die ejection pin mechanism. All imported from China. It worked beautifully. Toolig lasted for nearly 2 years in production. The pin it self was 16 mm in dia and 150 mm in lenght. Die operated at 500 C. had cooling and heating cycles too. Best part, the pin was 1/4 the price an American company quoted me.
Yes, I'm working as an Engineering staff, and we design machines, and yes in drawings, the plans, we use diameter 7 for a bolt of M6 for the same issue you've stated
It's a useful point that instead of going up a fastener grade simply go to the next diamater. It's pretty much an axiom saying that if breakage occurs then the fasteners were not enough for the load ;)
Bravo!!! Class 12.9 bolts are often used when prolonged use under harsh loads risks stretching the bolt rather than breaking it which is why very specific torque settings are required, A good example is Cylinder Head bolts on an engine that need to expand/contract and still remain tight avoiding cylinder head failure :-))
Days of 12.9 class bolts on cylinder heads are gone. Most cars of current century use 8.8 class bolts for cylinder heads. Torque spec is close to yield limit of bolt, so bolt acts as a spring and provides more consistent clamping force under different temperature related expansions of cylinder head
@@el_kuks "Stretch bolts" that aren't supposed to be re-used.
If a bolt is stretched it is a failure and should be binned. It will no longer have much strength.
This content wasn’t meant to show a “fair” comparison apples to apples. It was “engineered” to showcase Chinese quality and change perceptions of Chinese metal parts being of inferior quality. This is a PR piece.
Would second an interest in seeing the failed bolt surfaces - a ductile failure of the bolt compared to striping the thread is an interesting comparison. I'd also be very interested to see polished and etched microsections - how do the compositions and heat treatments (obviously, if any) vary? Even the quality of the machining on the thread would be an interesting factor, though I'll admit that's probably too much effort for a KZhead video.
Haven't read all the comments but some bolts have threads at the gap between the two plates and some are solid, no threads. Threads will weaken the bolt in shear at the thread compared with the unthreaded shaft of the bolt.
I came here to leave a similar comment but found yet again, great minds think alike.
The bolts that have a full length thread are called set screws, bolts are partially threaded
The shear test should be done with a flat peace of steel between 2 supports, torqued with A torque wrench. This will give you 2 shear areas, but no momentum on the screws. Also the friction between the plates will be identical fir comparison. I believe in the first test the chinese titanium screw showed a better value because it was not only applied with shear force, but also with tension because the plate was already pushed away…
for sure
He also used the threaded portion of the fastener which is slightly smaller and weaker
Truly unfair comparison. Space bolt had washers (clearly softer metal) and a nut adding leverage against bolt. Fastening nut should be flush as with chinese titanium bolt.
My father was an commercial aircraft mechanic and salvaged a lot of the fasteners that were replaced. We used them on various mechanical projects and automotive uses like exhaust bolts. Whatever materials they were made of, they never rusted or stripped, super strong.
A bloke I knew worked for Scania (trucks) and he kept some bolts and stuff. You could put a spanner on those and screw them into the appropriate sized hole in steel and not bother tapping a thread first! They don’t rust and you can’t weld them (accidentally got too close to one bolt but the weld didn’t take).
... a* commercial airdraft mechanic
@@einundsiebenziger5488 Good thing you chimed in. People must have been so confused by my typo.
@egoequus6263 i was very confused I'm glad he explained what you were trying to type
I have a question about those shear tests. Did you torque them to spec for specific steel or titanium and have the same torque specs for each? Only asking because the bolts are much stronger when torqued when applying to sheer strength. I believe tension strength is improved as well but I haven’t specifically looked into that in the past.
Would be great a sheet at the end of the video showing all the results. It's easyer to compare it. Thanks for the video!
Thought about it too.
It’s just satisfying seeing seemingly indestructible stuff break.
Nothing in this video is purported to be indestructible. You need a better grasp on reality.
@@East-somewhere i just claimed they were 'seemingly' indestructible...nothing is indestructible...there is always something bigger, and stronger, or smaller and more pervasive...i prefer to not grasp reality at all since the fundamental state of reality is to always change.
@@East-somewhere You need a better grasp on a personality.
@@East-somewhere nice gaslight. my mang said "seemingly." dont ever invite this edgy clown to a party.
There are many grades of Titanium. We have no idea what is being tested here.
He is testing from what the label says., what’s the best grade …………..?
These bolts are Class 5.
I agree with all the posters below who said put up a final chart with all the results side by side.
You shouldn't forget that titanium alloy was designed to stay stable under high and low temperatures when most types of steel become more brittle or plastic.
Also strength to weight ratio
And corrosion resistance.
I think that when you do your tests you should get a torque wrench and torque the bolts to a specific torque. Because it may make a difference if the bolts are not torqued the same. That would make your video's more accurate.
And match thread pitch
Torque doesn't appear to be necessary since they're pulling against a nut and the threads, not 2 flush plates.
I appreciate your test. It would be great to test three different ARP bolts. The 8740, the 2000 and the L19. It would not be comparing the ARP bolts to other kinds or brands, so maybe the legalities are reduced.
Would be cool to see this done with better controls. All bolts same diameter. Same threads. Torqued to the same spec or maybe “optimal” spec for the given material.
Why am I watching this at all? It is so satisfying and I don't know why.
The torque in to the bolt is a very important variable to the resistence of your assembly. A 10.9 class bolt may resist much less than a 8.8 (same dimensions) if not enough torque is given.
Thx, just wanted to write that! That's a very crucial factor, as well as the surface condition of the connecting plates.
I doubt that would matter. this seems like the type of guy that didn't even match thread pitch.
Why titanium for spaceship is weaker than aliexpress bolts?
Thats not how titanium works, titanium is lighter than steel, but similar strength, the aliexpress bolts arent oure titanium and have other alloys in them to make it cheaper to produce, but they are about the same weigh as steel, not titanium, making them useless
Probably optimized for weight VS optimized for strength
Nasa still thinks light "travels". What do expect from them? They need a bit more Einstien to wake up.
Amazing to see the strengths of those bolts, but would of been nice to have the results listed.
Wow. AliExpress bolts exceeded my expectations. Space bolt is lightweight not entirely titanium but a composite or alloy
not a true test, need to have the same spec, same weight, etc...
@@callmejon 😵💫😵💫😵💫😵💫
Yep, grade 5 or Ti6AL4V
Don't trust this channel's results. The format is crap
Shocked that the AliExpress bolts performed as well as they did. I figured they'd be filled with rabbit turds or something (like fake cigarettes a few years ago).
@Baldspot How old are you ? 100 ? 😅
@Baldspot My dad was born in the 50's and he never heard that "Made in Japan" meant junk. Although you are right, the West underestimate China way too much.
I think that quality itself isn't necessarily the issue when the product in fact matches the description of the seller on AliExpress. The problem is that regulation on such platforms is often bad, so there is no guarantee that a titanium bolt is indeed made of 100% titanium.
Wow what a surprise that fatmericans are xenophobic racist twats.
@@TempAccount358 That's true that many specifications are overrated in a wide variety of products sold there.
Using a huge spacer on the space bolt made a huge variable. I’d get full threaded bolts same size and repeat torqued to say 40ftlbs.
These relatively tiny bolts are incredibly strong is what I get from this video. Even the smaller ones take almost 2 metric tons of force to break. That’s about the weight of a mid sized pickup truck like a Chevy Colorado or Toyota Tacoma.
The tear test is known as tensile strength, as in under tension. You could have also done a bend test along with the shear test.
I am guessing titanium would suck literal engineering balls in that bend test. It would take PLENTY to bend it but it wont bend much
От степени затяжки резьбы много зависит, динамометрический ключ нужен.
ты прав. Привет из Бразилии
if you're wondering why titanium made in china has more shearing capacity, the reason is because it's straining unlike the other one. This is probably because of the faulty testing equipment. The bracket isn't supposed to let the bolt rotate but the Chinese bolt rotated a bit. Edit: Rewatched the whole thing again. Might just be the bolt tolerances allowing the nut to move a bit causing the loose bolt connection under shearing stress
You should hire a new editor
Just wondering, what is the rate of metal fatigue for both alloys? The weight and that should be the biggest factors for choice using it in a space craft
Well, weight is very important too when you want to make flying or space screws :)
More test like this please😉
The only downside to Ti bolts is that you need cadmium free tools to work on the Ti parts or else the cadmium corrodes the Ti. I worked at Viking Metallurical Corp, they make Ti jet engine parts and learned about this gift from space.
I would have liked to see the same tests with you torquing them to the same spec. With and without anti seize or another thread prep. Very cool though.
In the first series, that hole in the shear plate just about had to be picking up a rounded edge .
Great fun to watch. Thanks for such an interesting comparison of the strength of bolts made of different metals both by way of lateral tension and shear force
Space bolts look to have an MSO2 coating, whilst the Chinese version have an anodised finished. This wouls prevent hauling and ensure that when torquing the correct preload is induced. No lubrication can weekend the bolts ability to take a load.
Thank you. I came across this video as I was researching which bolt is best to hold the fartcan exhaust on my Honda civic. 👍🏽
When watching an hydraulic press working is more interesting than 90% of the KZhead content these day...
95%
Never go into space with just one bolt.
At the end can you list the results please. Also, what's with the music, starting ones were so ominous?
I use the Chitanium bolts for the DB killer on my bike. The T30 bolts show no signs of strippage whereas the 4mm hex bolts that they replaced where dangerously close to stripping after two track days.
2:28 you can see light/gap under the head of the bolt. You need a washer or a chamfered edge. The head of the bolt is being point loaded, a big no no
I really feel the pressure watching stuff like this. Pressing matters...
I felt like it was a weight off my shoulders to be honest!
I like the disclaimer at the beginning "do not try this at home", because we've all got a ten ton+ stress tester at home?🤣🤣🤣🤣🤣🤣🤣
I've got sixteen bolts and two titanium plates holding me together. No complaints about said material.
A better comparison would be to use two bolts of equal weight rather than the same size. That would show the relative strength vs weight. Titanium has an advantage in being lighter and does not rust, even in saltwater.
Some values worth taking into account: oxidative stress, heat stress and how both of those affect elastic and plastic deformation. I imagine the space use titanium can handle both values better than the cheap titanium as that is the environment they need to be designed to tolerate. (High G stress and atmospheric friction).
High G stress and atmospheric friction HAVE ZERO to do with anything regarding these bolts. In fact high G stress isnt even a thing regarding mechanical fasteners. Its got to do with a persons ability to withstand high G's. Atmospheric friction..lmfao you dug deep for that nonsense. We dont engineer nor test bolts factors that do not apply. Ask me how i know.
@@IOD_I'm curkous how do you know?
I like the way you set up that shear test!
The Chinese bolts sold on ebay/ aliexpress are normally grade 5 which is 6% aluminum and 4% vanadium. The chinese also sell the grade 2 titanium bolts. Which is not an alloy and is dull grey color.
Honestly, the most shocking thing was that a space shuttle has flat head hardware.
i think it is used due to it has less air restriction.
In the picture of the clip was no space shuttle but the soviet version.
I think it's not the head type but the grade of titanium used. Regardless of what the the tightening interface is it's more that this will be the same material type.
Actually the Allie bolts did quite well considering the price
Hmmm so.. different bolts of different materials, size, width and torque applied to will have different strenghts. How accurate this test was ! I am amazed !
This is what Dad did when he worked on the Titan IV rocket platform at Cape Canaveral. He was responsible for the stress analysis of the bolts for the launch assembly. The Cassini spacecraft was one of his projects.
You should have used a torque wrench for this experiment, in order to compare fairly these bolts. When tightened adequetly, all the cutting force turns to traction tensions. Failing to evenly torque bolts, could lead to uneven results
and if your measuring things equally, using a spacer changes the stretch of the bolt .
Been heard titanium is weak on impact and good at handling high heat, so the test result is more than I expected. And I wonder, doesn’t the manufacturer give the standard, of how much force the bolts are designed to handle? …
Yeah, this guy is just checking the numbers. Also those numbers are what the manufacturers are sure their product can handle, not what it will.
@@SoMuchFacepalm does these numbers indicate the tons it’s purposed to handle? I don’t really get it, not enough information
@@minercraftal pretty sure he's using kilos in the counter in the corner.
I have Scheuermann’s disease and needed my spine fused. 20 screws 2 rods and 2 connectors at top and bottom. They’re about the length shown 3” or so.
Would be nice to see a chart comparing strength to weight for all of them. Also, not torqueing them all down identically skews the data.
А условие одинаковой осевой затяжки деталек при тесте на "срез/смятие" в отверстии соблел? нет тогда по деталям машин садись 2, усилие затяжки повлияет на силы трения которые надо будет сначала "преодолеть" так еще и пары трения титан сталь не равны между собой по умолчанию, потому что тест на растяжение показал совсем другой запас прочности + гайки тоже надо брать равного класса, чтоб смятие витков было аналогичным с болтом, а то будет как с 12.9 - витки гайки остались на "дико каленом" болту, которые вообще запрещены в машиностроении, так как "лопаются" а не тянутся в случае разрушения, а так для обывателя "красиво", спасибо за ролики)
12 й класс закален и подвержен определенному отпуску, такой болт не хрупкий, но имеет повышенный предел текучести (0.9) относительно сопротивлению на разрыв, и сталь в таких болтах как минимум 40Х, а это уже не ст3.
@@chlonitazene Eso es verdad. Bien visto señorita.
Of course they use flathead screws on a spaceship. Those won't ever come out.
😅🤣😂🤣😅
No more likely than any other
@@andrewholdaway813 you've obviously never used a flathead screwdriver on flathead screws before.
@@justinwatkins3500 Just trying to find out wth you meant. Maybe they don't want them to be removed?
Yeah, next best thing to security head bolts.. especially if the loctite them with the green loctite by mistake.
Early deformation of the cheap titanium bolts shifts the force from shear to more tensile, appearing to make it stronger.
Not only is weight reduction considered, also the strength characteristics at the extreme temperatures regarding outer space and re-entry. Grade 8.8 bolts become very soft at only 800-900 degrees F., Very brittle below -100 F.
Can we just appreciate how strong all the materials are? I mean you can pretty much hang an SUV on one of those bolts and they are not even some big and thick ones.
The beauty of steel and alloy products are their tensile strength. If you could hold onto it, several people could hang from a coke can, though one heavy foot is enough to crush it. Of course, concrete is the opposite, which is why they are a brilliant construction product when combined.
Genuine titanium is capable of withstanding MUCH more pressure and load. Processing titanium is a challenging process.
High quality steel with the right hardness is still stronger than the best titanium alloy, titanium is used for weight reduction and corrosion resistance without giving up to much when it comes to strength.
@@andreasfjellborg1810 You are right. my boss at a titanium forging plant used to say "CP-Titanium is only as good as 316 Stainless in strenght but with much lower weight. There are stronger metals, such as nickle alloys that will beat titanium any day in strenght.
Needed to do one more, a bolt made by arp with their strongest alloy.
Looking at strength numbers can tell a small part of the story. Stress vs strain curves would be much more interesting to investigate.
Crazy how strong the Chinesium actually was
Not all titanium bolts are 100% titanium.. they are an alloy and pure titanium is very malleable (soft).
Ti CP Ti 3Al 2.5V Ti 6Al 5V
@@fontrogetcyprien681 Ti6AL4V
No titanium is pretty hard for a pure metal but it's properties are bad. Kinda brittle.
Don't trust this channel's results. The format is crap
only problem was the sheer point on space shuttle bolt was more than double the other bolts due to shallow thread length had to space with another nut and a bunch of washers pushing sheer point way out effectively making a fulcrum
Other factors to consider is that this is a room temperature test. Titanium performs better at high temperatures than most steels do, the intended use is another factor in decided which material is appropriate. Titanium is also less susceptible to most types of corrosion than steel is.
Don't just compare values of force applied on each bolt. They can be of different cross sectional area. The strength value should be in psi (pounds per square inch of cross section area) of shear, tension or compression.
not in most if the world! kPa?
Nobody with half a working brain cell measures anything in PSI...
Titanium bolt : 6 tones Rust thing * brokes * Titanium bolt : chill
These are the kind of hydraulic tests we need as opposed to crushing precious food and destroying environmentally hazardous stuff
So you’re telling my Chinese titanium bolts I have for decorative purpose are these strong ? 😂
Самые крепкие болты, которые я встречал - это на буровых каретках "Sandvik". На них написано 14,9.
6:31 this is not a proper test for bolt tensile strength. You used a thin section but that is not intended to hold loads for tension. From the video you can see that the threads are sheared. When you have a booted connection in tension, the threads and nut should never fail. Only the bolt shank (grip) should fail. Again, you need to use a proper tension but for this test. In the following segment you realized it and then used a different nut and the test right broke. It needs a bit of explanation to the audience.
You did a solid weld job on the three metal blocks
Years ago a surgeon in Hawaii found out right before surgery that he didn’t have the titanium rods he needed. He went to the auto parts store and bought titanium screwdrivers and hacked off the handles. The rods he inserted ultimately failed and after the next surgery to replace them the doctor tossed the inferior rods but a nurse retrieved them and turned them over to authorities. The patient was very elderly. I remember thinking that this guy went through too much to get to the position of a surgeon and then just shanked it. Like is a race to see if you die of natural causes before you really screw up something.
I think people are over analyzing this video. If you were designing something that needed critical fastener specs, you would most likely look at some fastener data sheets and use fastener hardware that satisfied your particular needs, such as tensile strength, shear strength, fatigue ratings, high / low temp specs, etc... possible even a magnetic / paramagnetic ratings. I think the video is fine, 99% of us watching are probly just goofing off wasting time here anyways. I doubt that anyone watching this video is using it to decide if they wanna use these bolts on their space shuttle. I'm still kinda surprised at the chinese hardware performance.
Steel alloys are stronger than Titanium, it's just that Titanium has good strength-to-weight ratio. Also, strength does not omly depend on the metal used. It also depends on the manufacturing method (cast, forged, powder-metal forged, machined forged billet, sintered, etc.)
For any shear or tension yield failure tests you need the area of material. force/area gives reliable data
in first application it is critical to torque them the same - otherwise you can just estimate the shear force if you tighten those steel bits properly the main resisting force comes from the friction between those two, which is proportional to the torque on the bolt, after that you just snapping it - the pulling test is done much better, but the weak point is always the thread
Hats off to you for taking a scientific approach. With all this expert advice in the comments, you'll be able to perfect your methods in no time and become the world's foremost testing and certification lab:-) Seriously, at least some of the advice is good, hope you take it impersonally instead of feeling kicked in the 'nads. In that spirit, I humbly suggest giving the bolts short names like "A," "B," "C," or Maui, Kush, Thai or something. My eyes aren't great and i kept missing the tests while trying to read. It would also remove some viewer bias. At the end of the video reveal what each label stands for along with a summary of the results.
Mother Fucker this was the most unscientific test I have ever seen. The dude didn't match thread pitch or applied torque equally along all tests. Know how a bolt works before testing them.
Son, there are at least five grades of titanium. And space is certainly not one of them...
Son, Not true. there are 26 grades. Plus multiple custom grades and alloy systems depending on the application. But 5 grades are basic available to the laymen.
Quite useful testing datas. Did you use M10 size bolts over there?
The last bolt gonna bring the house roof down but will stay intact lol
Now the real question is, where did he get spacecraft bolts from :)
pre-own Russian spacecraft
Aliexpress 😂
Pieces of the Columbia shuttle.
he is actually an alien
Next time you see a rocket exploding on the launchpad you will know.
Now that's what I call... Under pressure... 🤣
In the 60’s my dad worked for a company that produced fasteners and components for aerospace. Each and every piece had to be shot peened, magnafluxed, x-rayed, fail-tested and meticulously inspected under a stereo microscope… then personally signed off, every step of the way to ensure a tolerance as close to zero as humanly possible. It’s an expensive and labor intensive process…
And then NorskHydro goes and fakes thousands of tests over almost 20 years
@@nicholasdenney1318 I suppose, if they are Fakers.
Titanium is so light it almost feels like plastic like aluminum