ALLOY MATERIAL

Abstract: an alloy material that has excellent intergranular corrosion resistance is provided. an alloy material according to the present disclosure has a chemical composition containing, in mass %, c: 0.005 to 0.020%, si: 0.05 to 0.50%, mn: 0.05 to 1.00%, p: 0.030% or less, s: 0.0100% or less, cu: 1.5 to 3.0%, ni: 35.0 to 50.0%, cr: 20.0 to 30.0%, mo: 2.5 to 4.0%, co: 0.01 to 0.80%, w: 0.01 to 0.30%, ca: 0.0050% or less, n: 0.001 to 0.015%, al: 0.20% or less, b: 0.0030% or less, sn: 0.050% or less, and ti: 0.40 to 0.90%, with the balance being fe and impurities, in which the total content of ti, nb, v, zr, hf, and ta is 0.420 to 1.000%. the number density of fine nitrogen-containing precipitates at grain boundaries of the alloy material is 20 /�m or less.

Inventor(s): Kiyoko TAKEDA, Takahiro IZAWA

CPC Classification: C22C30/02 (ALLOYS (flints ; treatment of alloys , ))

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