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.GMR-235 Alloy is a nickel-base, precipitation-hardening alloy available in investment cast form for high temperature service. It is recommended for gas turbine and jet engine components operating in excess of 1400 F.