a nickel base alloy for high temperature oxidation resistant and thermally stable

摘要

A thermally stable, oxidation-resistant nickel-base alloy having good engineering properties for use in mechanical equipment operated at temperatures of up to 1600 DEG F. or higher is provided by maintaining the nickel content above 50% by weight and including as essential elements from about 12 to about 18% chromium, from about 8 to about 18% molybdenum and from about 0.005 to about 0.2% lanthanum by weight. Additional elements may be included in limited amounts provided that the average Nv number of the alloy as defined herein is not substantially above about 2.5 and preferably is below about 2.4.