| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonmagnetic alloy material having high strength exceeding 2,000 MPa at room temperature and high temperature stability, having high hardness and high corrosion resistance, also good in workability and high in versatile applicability in an Ni based alloy. SOLUTION: This Ni based high strength alloy has an alloy composition containing, by weight, <=0.1% C, <=2.0% Si, <=2.0% Mn, 30 to 45% Cr and 1.5 to 5% Al, and the balance Ni with inevitable impurities as a fundamental composition and strengthened by the composite precipitation of aγ' phase and anαphase. One or more kinds selected from the elements in the following groups may be added tehreto: (I) one or more kinds selected from Ti, Zr and Hf (in total in the case of two or more kinds): <=3.0%, (II) one or more kinds selected from Nb, Ta and V (in total in the case of two or more kinds): <=3.0%, (III) <=10% Co, <=10% Mo and/or <=10% W so as to satisfy Mo+0.5W: <=10% and (IV) one or more kinds selected from <=5% Cu, <=0.015% B, <=0.01% Mg, <=0.01% Ca and <=0.1% rare earth metals.
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