I typed a more involved question, but the computer/bbs ate it.

So....I turned down some parts made from two different bars of 303ss (at least that's what I'd ordered)....I cleaned both parts and placed them in and autoclave (steam sterilizer) for 30 minutes.

One came out spotless, and the other was covered with black and brown spots....needless to say I wasn't able to use the crappy one.

Any ideas what might have happened.....think they sent me two different steels or is there another reason?

Thanks all,