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 a permanent-mold casting alloy that has good castability, moderate strength and excellent machinability. It also has good pressure tightness. Its applications include automotive cylinder heads and timing gears.