| 摘要 |
An austenitic stainless steel, which comprises by mass percent, C: not more than 0.10%, Si: 0.01 to 1.0%, Mn: 0.01 to 2%, Cr: 16 to 18%, Ni: more than 10% to less than 14%, Mo: more than 2.0% to not more than 3.0%, N: 0.03 to 0.10%, one or more elements selected from V, Nb and Ti satisfying the following formulas (1) and (2), <?in-line-formulae description="In-line Formulae" end="lead"?>0.0013<=(V/51)+(Nb/93)+(Ti/48)<=0.0025 (1),<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>{(C/12)+(N/14)}-{(V/51)+(Nb/93)+(Ti/48)}<=0.0058 (2),<?in-line-formulae description="In-line Formulae" end="tail"?> wherein each element symbol in the formulas (1) and (2) represents the content (by mass %) of the element concerned, with the balance being Fe and impurities, wherein the content of P is not more than 0.04% and the content of S is not more than 0.003% among the impurities, has excellent corrosion resistance, in particular, excellent intergranular corrosion resistance. The preferable contents of Nb and Ti are not more than 0.030% and not more than 0.050%, respectively.
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