Hitachi Metals, Ltd.

Shogo Momono

Toshihiro Uehara

The present invention provides a Ni-based alloy that is hot-workable and exhibits an excellent high-temperature strength, and provides a heat-resistant plate material using the same. This Ni-based alloy is composed of, by mass, C: 0.002 to 0.10%, Si: less than 1.0%, Mn: up to 1.0%, P: up to 0.04% (including 0%), S: up to 0.01% (including 0%), Cr: 15.0 to 25.0%, Co: 0.1 to 18.0%, Mo: not less than 2.0% and less than 4.0%, Al: 3.0 to 5.0%, Ti: not less than 0.01% and less than 0.5%, Zr: 0.01 to 0.1%, B: 0.001 to 0.015%, Fe: up to 3.0%, Mg or Mg+0.6&#xd7;Ca: 0.0005 to 0.01%, N: up to 0.01% (including 0%), O: up to 0.005% (including 0%), and the balance of Ni with inevitable impurities, S/Mg or S/(Mg+0.6&#xd7;Ca) being up to 1.0, and a G value represented by the following formula (1) being 30 to 45.=7+0.11Cr+8.23Al+4.66Ti&#x2212;0.13(Ni+Co)&#x2003;&#x2003;(1)

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Tokyo, Japan

Shogo Momono