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- Apr 21, 2006
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I thought phil wilson ran S90V around 65.
He might, but I don't think so. Even 59-61 is considered hard for S90V. From his "seamount knifeworks" website he says:
The CPM steels, (Crucible Particle Metallurgy) makeup the largest percentage of my production. Both CPM S90V and CPM S30V have a high percentage of very hard; very fine Vanadium carbide particles in the steel matrix. This combined with enough Chrome to make them stain resistant make them ideal blade steels. CPM S90V was introduced in 1997 as an upgrade for CPM S60V. It has a higher attainable hardness for improved wear resistance. I worked in conjunction with Crucible Materials to pioneer the use of CPM S90V for knife blades. I remain one of the few makers currently offering it because very few are set up to heat treat this grade. I built a high temperature, precisely controlled furnace and developed the techniques required for consistent results. I heat treat CPM S90V to a finish hardness of (59-61). CPM S90V is the choice for the ultimate hunting blade.
Crucible about S125V
CPM S125V is a high performance upgrade to CPM S90V.
With 12% vanadium, it has superior wear resistance while
maintaining similar corrosion resistance. S125V has the
highest attainable hardness of any CPM stainless steel. It
is available only as CRU-CLAD.
CPM S125V is supplied in the annealed condition at BHN
280. Its typical application hardness is HRC 62-64.
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