I recently made some parts from what I had assumed were two bars of 303 ('cause that's what I'd ordered)....two parts from two bars of different diameter, 3/4" and 7/8".
Now I turned down the parts and thoroughly cleaned each...then I put them in the autoclave (steam sterilizer) for thirty minutes and when I removed them I found that one was spotless, and one was covered in blackish-brownish spots.
Needless to say I wasn't able to use the crappy one.
My question (which sounds really stupid as I write this) is, did they send me one SS and one mild steel, or do some grades of stainless actually rust easier than others....I mean they both seemed to cut with the same degree of difficulty that I usually find with SS.....it didn't seem like I was cutting 1018 or the like.
Thanks for any input.
I feel like an idiot for asking.