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.HY-100 is a low-carbon, hardenable alloy steel for ultra-service applications requiring excellent notch toughness and high strength. It can be welded to provide tough weldments.