Patent ID: 9074271
Filing Date: 2015-07-07
Classification: C21D,C22C

Abstract:
1. A dual-phase stainless steel sheet comprising, by mass %, C: 0.02 to 0.20%, Si: 0.10 to 1.0%, Mn: 0.20 to 2.0%, P: 0.040% or less, S: 0.010% or less, Cr: 15.0 to 18.0%, Ni: 0.5 to 2.5%, Sn: 0.05 to 0.30%, N: 0.010 to 0.10%, and a balance of Fe and unavoidable impurities, wherein the dual-phase stainless steel sheet has a ferrite and martensite dual-phase microstructure, and a Vicker's hardness of 200HV or more, and wherein a γp defined by the following formula (a) is in the range of 60 to 95: