| 摘要 |
<p>A martensitic stainless steel which has a essential chemical composition, in mass %, wherein C: 0.001 to 0.1 %, Si: 0.05 to 1.0 %, Mn: 0.05 to 2.0 %, P: 0.025 % or less, S: 0.010 % or less, Cr: 11 to 18 %, Ni: 1.5 to 10 %, sol.Al: 0.001 to 0.1 %, N: 0.1 % or less, O: 0.01 % or less, Cu: 0 to 5 %, and Mo forming a solid solution: 3.5 to 7 %, wherein the following formula (1) is satisfied and optionally one or more elements selected from at least one group of the following A to C groups are further contained, and wherein the balance is composed of Fe, Mo forming no solid solution, if any, and impurities, formula (1): Ni-bal.= 30(C+N)+0.5(Mn+Cu)+Ni+8.2 -1.1(Cr+Mo+1.5Si) >= -4.5; A group - W: 0.2 to 5 %, B group - V: 0.001 to 0.50 %,.</p> |
