CHROMIUM STEEL SHEET EXCELLENT IN PRESS FORMABILITY

摘要

A chromium steel sheet excellent in press formability, particularly, in both of deep drawability and resistance to secondary operation brittleness. The sheet contains, on the weight basis, at most 0.03 % of C, at most 1.0 % of Si, at most 1.0 % of Mn, at most 0.05 % of P, at most 0.015 % of S, at most 0.10 % of Al, at most 0.02 % of N, 5 - 60 % of Cr, 4(C+N)-0.5 % of Ti, 0.003 - 0.20 % of Nb, 0.0002 - 0.005 % of B, and optionally further at least one member selected from among 0.01 - 5.0 % of Mo, 0.0005 - 0.01 % of Ca and 0.0005 - 0.025 % of Se, and the balance consisting of Fe and inevitable impurities.