View Sample Alloy Digest Data Sheet (PDF)Since 1952, Alloy Digest has been the leading reference for materials property data on metals and alloys used throughout the world. Featuring graphs, charts and tables, these sheets give facts and figures on composition or characterization, physical and mechanical properties, heat treatment, and machinability.Udimet 901 is a nickel-base alloy having high creep and rupture strength at 1000 to 500 F. It is used in disc and other heavy forgings for commercial aircraft gas turbines.