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.RA718 is a nickel alloy precipitation hardened by gamma prime and double prime. It is readily fabricated and is weldable even in the aged condition. The alloy is used for gas turbine components at temperatures up to 650 deg G (1200 deg F) as well as for cyogenic equipment.