I’m being pedantic here, but stainless steel still has iron in it. The addition of chromium forms an oxide layer on the surface that prevents rust. If the body is rusting, that means they used a shitty grade of stainless. Stainless with an appropriate amount of chromium (and nickel) is expensive as fuck.
Comment on Tesla Cybertruck May Have A Rust Problem
vinylshrapnel@lemmynsfw.com 9 months agoThey keep using the words “stainless steel” which is an alloy created to be rustproof by removing the iron out of it. So how exactly is this stainless steel if it rusts?
kiwi5400@lemmy.world 9 months ago
Peppycito@sh.itjust.works 9 months ago
Stainless can go goofy after working it. Work hardening can even make stainless magnetic. Sorry, I don’t know the physics of why.
HootinNHollerin@lemmy.world 9 months ago
Stainless has chromium added. Iron is still the main element. Different stainless steels have various other elements added, like molybdenum. There’s a wide range of SS for various purposes. Not sure which one they used.
mellitiger@iusearchlinux.fyi 9 months ago
You are absolutely right, just for clarity:
Chromium needs to be > 12 weight-%. If you take 18 w-% Cr and 8 w-% Ni you get an austenitic steel which is (normally) neither magnetic nor able to be hardened.
FiskFisk33@startrek.website 9 months ago
it rusts less, far less in fact, but it still does rust.
Peppycito@sh.itjust.works 9 months ago
The answer is in the name. It’s stainless not stainproof
ChapulinColorado@lemmy.world 9 months ago
There are different types of stainless steel. Remember kids, it’s stain less not stain never.
vinylshrapnel@lemmynsfw.com 9 months ago
I guess there is still iron in it. Looks like they didn’t use an alloy with enough chromium for the application.
Lucidlethargy@sh.itjust.works 9 months ago
Tesla, cutting corners?! Say it isn’t so!
nilloc@discuss.tchncs.de 9 months ago
Well it has to be workable/formable, weldable and crack resistant under stress. Just welding most stainless mess with its ferrous properties.
Peppycito@sh.itjust.works 9 months ago
Forming it screws it up too. Work hardening after forging can make it magnetic.
lars@lemmy.sdf.org 9 months ago
In addition to funny is this also actually true?
Peppycito@sh.itjust.works 9 months ago
Absolutely. Why would they call it less if it’s actually never? That would be exceptionally terrible marketing.
lars@lemmy.sdf.org 9 months ago
Sure, “less” means “fewer” or “not as much as”.
But the suffix “-less” means “without”:
DanglingFury@lemmy.world 9 months ago
Yeah. I have a small pocket knife i carry everywhere, it is stainless. I’ve had it for years, and typically bring it in the water with me clipped to my swim suit (incase i need to cut a tangled rope). I wash it like a dish with soap and water, i use it hard and put it away wet, and it has been fine for years and years.
After all this, i took it on a single trip in salt water, it spotted with rust that night.
I also have a sig938 sas which has a stainless slide. I keep that dry and oil it on occasion, and yet that one spotted with rust within a year despite me taking good care of it.
Different grades of stainless make it different grades of rust resistant. Kind of like calling IP67 electronics like the iPhone 7 “waterproof” when they can only really withstand splashing