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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.
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
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.