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.Micro-Melt 23 is a general-purpose alloy with a good combination of properties. This high-speed tool steel is made from powder with all its inherent values.