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.NORAL C77S is a high strength, heat treatable, wrought aluminum alloy that is recommended for highly stressed components. It responds to the precipitation hardening heat treatment, producing tensile strengths in excess of all other aluminum alloys.