| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a bend pipe made of a martensitic stainless steel, and having excellent SSC (Sulfide Stress Corrosion Crack) resistance, and to provide the bend pipe. SOLUTION: A steel pipe having a composition comprising, by mass,≤0.009% C,≤1.0% Mn,≤1.0% Si,≤0.04% P,≤0.005% S, 0.01 to 0.2% Ti, 0.01 to 0.10% V, 0.001 to 0.1% Al,≤0.1% N, 4.0 to 8.0% Ni, 9.0 to 15.0% Cr and 1.5 to 7.0% Mo, and the balance Fe with impurities is prepared. The prepared steel pipe is subjected to bending, so as to be a bend pipe. The bend pipe is quenched at a quenching temperature of <950°C. The quenched bend pipe is tempered. COPYRIGHT: (C)2009,JPO&INPIT
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