I bought some A2 from McMaster...no certs. Then I got to thinking it would be nice to know the content % of the different alloying materials. They could not provide certs after the fact because there was know real identifying marks on the paper wrapper as to company or lot #.
So they told me to look at the detail page on the website for the range of composition. the A2 will fall within this range. Here's the pic of that page. Is the Chromium too much of a spread as to allowable %? Would not 2 pieces of steel from either end of the tolerance be entirely different knives? 4.75%-13% seems like a very big difference to me.