| 摘要 |
Provided is an Ni-based alloy suitable as a member for a gas turbine, the alloy having a composition comprising, in mass%, Cr: 14.0-17.0% (preferably 14.0% to less than 15.0%), Fe: 5.0-9.0%, Ti: 2.2-2.8%, Al: 0.40-1.00%, total of Nb + Ta: 0.7-1.2%, B: 0.001-0.010%, Zr: 0.01-0.15%, Mg: 0.001-0.050%, Mn: 0.01-0.20%, Cu: 0.005-0.300%, Mo: 0.01-0.30%, and C: 0.01-0.05%, with the remainder being Ni and unavoidable impurities, and having excellent high-temperature creep characteristics such that, in creep tests under conditions of a test temperature of 750°C and a test load of 330 MPa, preferably, the creep fracture lifetime is 120 hours or more, and the elongation is 16% or greater. |
