High strength, high fracture toughness structural alloy

Details High strength, high fracture toughness structural alloy High strength, high fracture toughness structural alloy

C - Chemistry, Metallurgy

22

C

75/140

C22C 38/44 (2006.01) C22C 38/52 (2006.01)

Patent

CA 2013081

A high strength, high fracture toughness structural steel alloy consisting essentially of, in weight percent, about C 0.2-0.33 Cr 2-4 Ni 10.5-15 Mo 0.75-1.75 Co 8-17 Fe Balance and an article made therefrom are disclosed. The alloy is an age-hardenable martensitic steel alloy which provides a unique combination of tensile strength and fracture toughness. The alloy provides excellent mechanical properties when hardened by vacuum heat treatment with inert gas cooling and has a low ductile-to-brittle transition temperature.

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