Masamoto uses Hyper Molybdenum Vanadium for their VG series Stainless steel knives. This is equivalent to AUS-10 of higher Carbon version of AUS-8 Molybdenum/Vanadium steel that is very popular for superb edge retention and corrosion resistance. The higher Carbon composition increases the hardness and edge holding ability longer.
C 0.95-1.10% | Cr 13.00-14.50% | Mo 0.20-0.30% | V 0.10-0.30%