Is superior in resistance hole open Characteristic the finishing steel sheet null for deep drawing

摘要

PROBLEM TO BE SOLVED: To provide a surface treated steel sheet for deep drawing, free from deterioration in press workability and recyclability and excellent in pin holing resistance. ;SOLUTION: This steel sheet has a composition which consists of, by weight, ≤0.005% C, ≤0.05% Si, ≤0.3% Mn, 0.01-0.05% P, 0.001-0.015% S, ≤0.05% Al, 0.001-0.06% Sb, 0.005-0.15% of one or more elements selected from Ti, Nb and B, and the balance Fe with inevitable impurities and in which P and S satisfy the relation of P (wt.%)/S(wt.%)≥5.;COPYRIGHT: (C)2001,JPO