Patent ID: 6488786
Filing Date: 2002-12-03
Classification: C21D,C22C

Abstract:
A high-strength, high-toughness martensitic stainless steel sheet having a chemical composition comprising, in mass percent,more than 0.03 to 0.15% of C, 0.2-2.0% of Si, not more than 1.0% of Mn, not more than 0.06% of P, not more than 0.006% of S, 2.0-5.0% of Ni, 14.0-17.0% of Cr, more than 0.03 to 0.10% of N, 0.0010-0.0070% of B, and the balance of Fe and unavoidable impurities and having an A value defined by Equation (1) of not less than âˆ’1.8:A value=30(C+N)âˆ’1.5Si+0.5Mn+Niâˆ’1.3Cr+11.8â€ƒâ€ƒ(1).