Hmmmmm. I thought 0170-6C was just a different designation for 50100-B. At least that's what Joe Talmadge says it is:

"0170-6 - 50100-B These are different designations for the same steel: 0170-6 is the steel makers classification, 50100-B is the AISI designation. A good chrome-vanadium steel that is somewhat similar to O-1, but much less expensive. The now-defunct Blackjack made several knives from O170-6, and Carbon V may be 0170-6. 50100 is basically 52100 with about 1/3 the chromium of 52100, and the B in 50100-B indicates that the steel has been modified with vanadium, making this a chrome-vanadium steel."

Source: http://www.knifeart.com/steelfaqbyjo.html

What I don't know is, if you add chromium and vanadium to 1095, do you essentially end up with 50100-B? <img src="/ubbthreads/images/graemlins/confused.gif" alt="" />