Patent ID: 8313591
Filing Date: 2012-11-20
Classification: C21D,C22C,F22B

Abstract:
1. An austenitic heat resistant alloy, which consists of, by mass percent, C: not more than 0.15%, Si: not more than 2%, Mn: not more than 3%, Ni: 40 to 80%, Cr: 15 to 40%, W: not less than 3%, and W and Mo: 3 to 15% in total content, Ti: not more than 3%, Al: not more than 3%, Co: 9.85 to 20%, N: not more than 0.03% and O: not more than 0.03%, with the balance being Fe and impurities, in which the contents of P, S, Sn, As, Zn, Pb and Sb among the impurities are P: not more than 0.04%, S: not more than 0.03%, Sn: not more than 0.1%, As: not more than 0.01%, Zn: not more than 0.01%, Pb: not more than 0.01% and Sb: not more than 0.01%, and the value of P1 defined by the following formula (1) and the value of P2 defined by the following formula (2) satisfy the relationships expressed by the following formulas (3) to (6); wherein each element symbol in the formulas represents the content by mass percent of the element concerned.