silly question

Can 300 series stainless be case hardened?
Bear
Reply to
bear
Loading thread data ...
No, it will do bad things to it's structure. Excessive carbon reacts bad to stainless steels. It causes chromium carbide cracking.
You would be better off buying some 400 series SS, like 410, 420 or 430.
400 series is what most SS knives are made from.
Reply to
Ernie Leimkuhler
That's what I thought, damn. I thought maybe I could get harden a hinge pin on a stainless meat saw and have to replace it less often,,
Reply to
bear
Yes, but you wouldn't like the results ! (Try it !)
You can introduce carbon into the surface OK, but the metallurgy goes berserk and it ends up brittle as anything and full of cracks. This is enough of a problem that it even occurs with "accidental" case hardening, if you have hot metal near a carbon source and short on oxygen.
Reply to
Andy Dingley
You can work harden it, but 300 series SS is classed as non-hardening. You can surface coat it, like the gold toned mill bits and drills, and that will last until you wear through the coating.
Charly
Reply to
Charly the Bastard
I'm well aware of it's work hardening, I worked for a while making bone biopsy tools and fracture fixation devices when that stuff gets work hardened it'll eat carbide drill bits, end mills and lathe inserts like they were made out of lead.
Reply to
bear

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.