Patent ID: 9731345
Date: 2017-08-15
CPC Classifications: B22D,C21D,C22C

Claim:
1. A martensitic cold-rolled and finally heat-treated stainless steel sheet comprising, as percentages by weight, 0.45 to 0.60% carbon, 0.02 to 0.08% nitrogen, 0.2 to 0.4% silicon, 0.3 to 0.6% manganese, 12 to 15% chromium, 0.1 to 1.5% molybdenum, and 0.6 to 1.5% tungsten, balance Fe and other unavoidable impurities, wherein the final heat-treatment hardness of the stainless steel sheet is within a range of 500 to 750HV, and wherein no rust is formed on the surface of the finally heat-treated stainless steel sheet after immersion in a 0.05% NaCl solution at 85° C. for two hours.