Well every stainless steel is a modification of 420. <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />

420 is the simplest stainless steel.

S90V has a hell load of other crap that 420 doesn't have. <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />

Lots of vanadium.

JYD #54 "Put your hands high, let your arms be the pillars that be holding up the sky..."