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.ALLEGHENY LUDLUM ALLOY S-816 is a high heat and corrosion resistant alloy, responding to age-hardening heat treatment. It has high mechanical properties at elevated temperatures, and is oxidation and corrosion resistant.