Martensitic stainless steel strip

Abstract

The present invention provides: a martensitic stainless steel strip which has more excellent fatigue characteristics and mechanical strength than conventional martensitic stainless steel strips. A martensitic stainless steel strip, said martensitic stainless steel strip containing, in mass %, from 0.3% to 1.2% of C and from 10.0% to 18.0% of Cr, having a martensite structure, and having a thickness of 1 mm or less. An amount of the residual austenite in the martensitic stainless steel strip is 10 to 25 volume %. A tensile strength is 1,600 MPa or more and 2,300 MPa or less. A proof stress ratio which is a ratio of 0.2% proof stress to the tensile strength is 75% or less. A ratio of compressive residual stress in a rolling direction to compressive residual stress in a rolling width direction of the martensitic stainless steel strip is 75% or more.

Dependencies are inferred from the claim text.