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 222.0 is an age-hardenable aluminum alloy for sand and permanent mold castings. It is hard and wear resistant and has good strength at elevated temperatures. Applications include cylinder heads and pistons.