Patent ID: 8858875
Filing Date: 2014-10-14
Classification: C22C,C22F

Abstract:
1. A Ni based alloy material, having a chemical composition which consists of by mass percent, C: not more than 0.03%, Si: 0.01 to 0.5%, Mn: 0.01 to 1.0%, P: not more than 0.03%, S: not more than 0.01%, Cr: not less than 20% to less than 30%, Ni: more than 40% to not more than 50%, Cu: 3.52 to 5.0%, Mo: 4.0 to 10%, Al: 0.005 to 0.5%, W: 0.1 to 10% and N: more than 0.10% to not more than 0.35%, with the balance being Fe and impurities, and the following formula is satisfied, and further, having a surface hardness of a Vickers hardness of not less than 350 at 500° C.; wherein, each element symbol in the formula (1) represents the content by mass percent of the element concerned.