U - V
Expressed as V. Helps to produce fine grain during heat treat.
A very hard to find steel, with a high vanadium content. It is extremely difficult to work and very wear resistant.
Carbon-1.12%, Manganese-0.30%, Chromium-7.75%, Vanadium-2.40%, Molybdenum-2.40%, Tungsten-1.10%
0.95 - 1.05 Carbon, 0.5 Manganese, 14.5 - 15.5 Chromium, 0.10 - 0.30 Vanadium, 0.90 - 1.20 Molybedenum. A serious rival to 154CM and ATS-34. Users report superior performance in edge holding. Presently available only in knives made in Japan.