Ordered some A-2 from Alro, they shipped stainless steel. We machined it and sent it out for vacuum heat treat. Obviously, it didn't get hard, when it came back, we put a magnet to it, nonmagnetic. Between labor and heat treating we had $750.00 into it, our cost (not sales price). Contacted Alro (we are a good customer for years), provided documentation, they replaced material at no cost and credited our account $750.00. Everybody screws up once in a while, but how you handle the problem separates a good vendor (or customer). Thought I would give them a thumbs up for the way it was handled.