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.H22 is a tungsten hot work steel with the principal alloying elements of carbon, tungsten, chromium and vanadium. It resists softening at elevated temperatures.