Stainless material for high-strength processing excellent in hydrogen embrittlement resistance, its stainless steel wire, and stainless steel molded product

摘要

PROBLEM TO BE SOLVED: To provide a stainless steel material as the material having excellent plastic workability and corrosion resistance and also having a hydrogen embrittlement resisting function, and particularly suitable as the one for heading or molding in cold and warm conditions, a stainless steel wire, and a stainless steel formed part obtained by subjecting them to plastic working.SOLUTION: The high strength stainless steel material for working having excellent hydrogen embrittlement resistance is composed of an austenitic stainless steel having a composition comprising, by mass, 0.03 to 0.18% C, 0.05 to 0.30% N, ≤1.5% Si, ≤2.0% Mn, 8.0 to 15.0% Ni, 15.0 to 25.0% Cr, 0.20 to 3.0% Mo and ≤2.0% Cu, and the value A represented by the formula: A={6.2Ni+0.7Cr+3.2Mn+9.3Mo+50(C+N)}/14.3Cu satisfies 10.0 to 35.0%. and the balance Fe with inevitable impurities, and in which Hv hardness is 150 to 350, and also, Poisson's ratio (P) at 20°C is 0.23 to 0.28. The stainless steel is made thereof. The stainless steel formed part uses them.