450冶金工程技术

摘要

The effect of [S] on strength and toughness of low alloy steel plates in which sum of [P], [N], T[O] is less than 8x10^-5 and the effect of T[O] on strength and toughness of the steel plates in which sum of [S], [P], [N] is less than 7×10^-5were investigated.