Steel for the manufacture of separable mechanical components and separable mechanical component

摘要

Steel useful for the manufacture of a separable mechanical component, whose chemical composition preferably comprises, by weight: 0. 25%≦ C≦0.75%, 0.2%≦Si≦1.5%, 0.1%≦Mn. ltoreq.2%, 0%. ltoreq. Ni≦1%, 0%≦Cr≦1%, 0%≦Mo. ltoreq.1%, 0%. ltoreq.Cu≦1%, 0%≦ V≦0.2%, 0.02%≦ S≦0. 35%, 0.04%≦P≦0.2%, 0%≦Al≦0.005%, 0.005%. ltoreq.N≦0.02%; optionally at least one element taken from lead, tellurium and selenium in contents of less than 0.1%, the balance being iron and impurities resulting from the smelting, the steel being optionally treated with calcium. Use of the steel for the manufacture of a separable component and component obtained.