Abstract: A high strength steel, useful in the manufacture of power bucket teeth, track links for tracked vehicles, frogs, working members of crushers and other mechanical components exposed in service to heavy loads, high - speed wear and subzero temperatures, consisting essentially of 9-25% Mn, 0.3-1.2% Si, 0.8-4% Cr, 0.06-0.25 Nb, 0.001-0.01% B, up to 0.05% S, up to 0.1% P and the balance, iron, said steel being capable of being hardened at temperatures of 1080.degree. C and less.