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.Allvac 718Plus alloy is a variant of alloy 718 (Alloy Digest Ni-90) made by adding new elements and adjusting others. The triple melting produces a stronger alloy with consistent properties in strength, stability, and forgeability.