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.Copper Alloy No.1 C84200 is a free-machining copper-tin-lead-zinc alloy for castings; it was formerly identified as 80-5-2.5-12.5 alloy. It has good casting characteristics, good machinability, moderate strength and ductility and good corrosion resistance. Among its many uses are ornamental fixtures, general hardware, plumbing goods, small gears and pipe fittings.