High-strength, high-fracture-toughness structural alloy.

摘要

A high-strength, high-fracture-toughness structural steel alloy consists essentially of, in weight percent, about <TABLE> Articles can be made therefrom. 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.