Patent ID: 7169241

Claim:
A Ni-based superalloy having high oxidation resistance, the superalloy being hardened by dispersing γ′ phases in a γ-phase matrix, wherein the superalloy contains, by weight, C: 0.05 to 0.2%, B: 0.01 to 0.03%, Hf: 1.1 to 2.5%, Co: 9.7 to 15%, Ta: 0.1 to 4.5%, Cr: 1.5 to 9%, Mo: 0.01 to 0.9%, W: 5 to 14%, Ti: 0.1 to 4.75%, Al: 4 to 7%, Nb: 0.1 to less than 4%, Re: 0.01 to less than 9%, at least one of rare earth elements: 0 to less than 0.1% in total, and any of V, Zr and platinum group elements: not more than 0.005%.