Patent ID: 8628630
Filing Date: 2014-01-14
Classification: B21D,C21D,C22C

Abstract:
1. A hot-pressed steel sheet member having a composition comprising, by mass, C: 0.09% to 0.38%, Si: 0.05% to 2.0%, Mn: 0.5% to 3.0%, P: 0.05% or less, S: 0.05% or less, Al: 0.005% to 0.1%, N: 0.01% or less, Sb: 0.002% to 0.03%, and the balance being Fe and inevitable impurities, and having a tensile strength TS of 980 to 2,130 MPa wherein a ratio of Sb-max/Sb-ave is 5 or less.