Martensitic Stainless Steels

Martensitic class stainless steel, a chromium-iron alloy containing 10.5 to 17% chromium and controlled amounts of carbon. This type is extremely strong and tough, but not as corrosion resistant as the other two classes. Highly machineable and hardenable by heat treatment this stainless steel class contains Types 410, 416, 420, 420F, 431, 440A, 440B and 440C.