Patent ID: 6171413
Filing Date: 2001-01-09
Classification: C21D,C22C

Abstract:
A soft cold-rolled steel sheet consisting essentially of:0.06 wt. % or less C, 0.1 wt. % or less Si, 0.5 wt. % or less Mn, 0.03 wt. % or less P, 0.03 wt. % or less S, 0.006 wt. % or less N, 0.009 wt. % or less B, a stoichiometric ratio of B/N being 0.6 to 1.5, Al satisfying the following equation:Al.ltoreq.0.035.times.(B/N.times.0.6).sup.1/2and the balance being Fe and inevitable impurities.