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 384.0 is a general-purpose alloy for making intricate die castings. It has good castability and foundry characteristics, good machinability and good strength. It is an excellent alloy for large thin-walled castings, and is suitable for castings requiring pressure tightness.