this post was submitted on 17 Feb 2024
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This Is Why Tesla’s Stainless Steel Cybertrucks May Be Rusting::Who knew stainless steel might not be such a good idea for the exterior of an electric SUV? The entire automotive industry, that's who.

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[–] [email protected] 43 points 10 months ago* (last edited 10 months ago) (14 children)

DeLorean is 304 Stainless. Cyber truck is 30? stainless. As in Tesla doesn't want to say, which is why they write it "30X".

given how hard the steel is purported to be, it's likely a variant of 304N, instead of 304 or 304L. (basic stainless like in commercial kitchen equipment and 18/10 stainless, like in high end cooking pans). 304N is harder to work with cold due to it's hardness and gets harder when worked, both properties Tesla has reported as belonging to the cybertruck's steel. 304N is considered a marine grade stainless steel.

There have been a lot of developments in stainless steel production in the 40ish years since the DeLorean came out, so I highly doubt it's the same steel.

[–] [email protected] 7 points 10 months ago (1 children)

300 are all austenitic*, they could have been heating it or either working it too much and sensitized it, both lowering its strength and its corrosion resistance

[–] [email protected] 2 points 10 months ago

Heh, even more reason to never buy version 1. I doubt they're doing anything but pulling steel off a roll, cutting it, stamping it, and spot welding a reinforcing piece to the back.

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