Conducting testing on 300 series stainless steel - temperature and bullet test

[TerryMack]

This is counterintuitive, but the Space Shuttle had a black underside to help it get rid of heat.

Those tiles were specially designed to draw heat and dispel it made of LI-900 silica ceramics. Those tiles were very fragile! The CyberTruck roof will not be that type! It needs to be tough as the CT itself!!!

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[Rockvillerich]

What will it take to dent it? I know that these are small sample sizes but at 3mm I would expect it to be pretty hard to dent.

I'd be surprised if anything like normal wear and tear, door dings, hail and such, would come close to denting 3mm stainless. Bet one of those Space X fabrication guys could give us some insight or hints about what it's like to work with, repairability wise.

 

[hridge2020]

Shopping cart bump testing next..

 

[Newton]

Shopping cart bump testing next..

LOL, got a little video being finalized. shopping carts would hardly effect the CT

 

[ldjessee]

finished some shooting and scratching tests

Thanks for all your work!

 

[Newton]

Thanks for all your work!

thanks for saying that

some1 asked so:

-Range was about 40 yards and 20ft, the damage was the same seminngly.
-.22 was cci stingers from a 16inch barrel
- im pretty sure 9mm was Fiocchi 147 grain FMJ from a baretta m9, barrel length is 5 inches i think
- the rifle round was 7.62x54R just old Russian ammo from a 26 inch barrel (but these were slightly magnetic, I think they have a steel core)

im pretty sure any rifle round would penetrate it.

I wish I had more handgun calibers and a chronograph to get more scientific data, but this is what i can do.

 

[Revoltlution]

Do y'all think the exoskeleton will require a double-wall anywhere?

 

[Newton]

I was just thinking about that, kind of. It will need a body/ cab area, or something that can hold everything together and have aplace for the passangers.
im thinking a thinner stamped stainless, the Tesla cars now have aluminium but steel and aluminum shouldn't really be together. If you look at this pic, the cab area looks like typical stamped steel. Im a visual guy, so made a little pic to try an explain

so i guess in effect the cab area will be double walled with a thinner material as the double

 

[Dids]

I was just thinking about that, kind of. It will need a body/ cab area, or something that can hold everything together and have aplace for the passangers.
im thinking a thinner stamped stainless, the Tesla cars now have aluminium but steel and aluminum shouldn't really be together. If you look at this pic, the cab area looks like typical stamped steel. Im a visual guy, so made a little pic to try an explain

so i guess in effect the cab area will be double walled with a thinner material as the double

Yes you are right it certainly is stamped. And it might be a stamped stainless steel. The color suggests that although they could have painted steel to match the stainless exterior panels....

 

[OneLapper]

Yes you are right it certainly is stamped. And it might be a stamped stainless steel. The color suggests that although they could have painted steel to match the stainless exterior panels....

This is one of my biggest questions about the CT, and it may determine whether I go through with purchasing it. Are those stampings that comprise the door jams, interior panels, floor, etc., are they stainless steel? Obviously they aren't and don't need to be 3mm, but in my opinion, they *have* to be stainless or else what's the sense of making a SS exoskeleton if the other parts of the CT can (and will in New England) rust?

 

[hridge2020]

Guess wait till Cyber factory produces, first batch of purchasers I'm sure there will be lots of you tube reviews of the vehicle.

 

[ajdelange]

baretta

Typo. Picturing a 50 BMG pistol

- the rifle round was 7.62x54R just old Russian ammo from a 26 inch barrel (but these were slightly magnetic, I think they have a steel core)

I remember some of that stuff with steel casings. But the bullet core?

 

[Newton]

Typo. Picturing a 50 BMG pistol
I remember some of that stuff with steel casings. But the bullet core?

lol.
I guess I got armor piercing from my bulk ammo purchase years ago. It looks like copper, lead than steel core. Maybe I'll shoot it again with a regular copper/lead round. but it would still go through most likely
It is silver tipped painted

 

[ricinro]

The gauge and hardness of the SS used on the CT exoskeleton may vary. Elon mentioned bulletproof door panels (1/4 -1/2 hard work hardened 11 ga. 304L SS) but the underlying frame would be Annealed and stamped/welded and perhaps thinner gauges. There are some close up pictures around the headlights where the sheet metal appears thinner and welded. This may be necessary for crumple zone requirements.
The CT is tougher than it needs to be where it needs to be but could still be a great design if non-critical areas were lighter (thinner) yet rigid by stamping.

Thanks for the temperature and ballistic testing Newton! a test is worth a thousand expert opinions.

 

[Newton]

The gauge and hardness of the SS used on the CT exoskeleton may vary. Elon mentioned bulletproof door panels (1/4 -1/2 hard work hardened 11 ga. 304L SS) but the underlying frame would be Annealed and stamped/welded and perhaps thinner gauges. There are some close up pictures around the headlights where the sheet metal appears thinner and welded. This may be necessary for crumple zone requirements.
The CT is tougher than it needs to be where it needs to be but could still be a great design if non-critical areas were lighter (thinner) yet rigid by stamping.

Thanks for the temperature and ballistic testing Newton! a test is worth a thousand expert opinions.

Yes, all good observations.

I couldn't find hardened 304, based on the test they showed in the presentation it was hardened. Whether or not they will use that in the real truck no1 knows. I would assume a cheaper cold rolled 304 like i tested would be used but they might opt for hardened for door panels and other areas like u said!

Gonna be a cool truck any way you smear it.