There seems to be a school of thought out there that CRK S30V is already hardened to an RC which is a little high, not sure you would need the blade any harder.
Not that I have any problems with my sebbie, it has a nice polished edge which is shaving sharp. I just maintain it with regular light strops and a sharpen when I think it needs it.
Why are you asking, curiosity or do you have a specific job in mind?