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HAP-40 is a powder metallurgy High Speed Tool Steel from Hitachi Metals Ltd. It’s rich chemical composition and fine microstructure allows the production of knives that posses an outstanding balance of hardness, toughness and edge retention. In terms of cutting performance, edge retention, some knife experts believe that HAP-40 is probably the best Japanese cutlery steel on the market.
C 1.27-1.37 % | Cr 3.70-4.70 % | W 5.60-6.40 % | Mo 4.60-5.40 % | V 2.80-3.30 % | Co 7.50-8.50 %