AUSTENITIC STAINLESS STEEL

摘要

An austenitic stainless steel which contains, by mass, C: 0.10% or below, Si: 0.01 to 1.0%, Mn: 0.01 to 2%, Cr: 16 to 18%, Ni: more than 10% and less than 14%, Mo: more than 2.0% and up to 3.0%, N: 0.03 to 0.10%, and one or more of V, Nb and Ti in amounts satisfying the relationships (1) and (2) with the balance consisting of Fe and impurities and in which the contents of P and S as impurities are 0.04% or below and 0.003% or below respectively: 0.0013 = (V/51) + (Nb/93) + (Ti/48) = 0.0025 ... (1) {(C/12)+(N/14 - {(V/51)+(Nb/93)+(Ti/48 = 0.0058...(2) (wherein each atomic symbol represents the content (% by weight) thereof). The stainless steel is excellent in corrosion resistance, particularly in intergranular corrosion resistance. It is preferable that the contents of Nb and Ti be 0.030% or below and 0.050% or below respectively.