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.ALUMINUM 213.0 is an aluminum-base alloy that is used for permanent-mold castings. It is characterized by good castability, excellent machinability, moderate strength and fair weldability. Among its uses are pressure-tight castings and automotive cylinder heads.