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.Superelso 500HR, also known as SE 500HR, is a high yield strength, quenched-and-tempered alloy for wet H2S service in the oil and gas industry.