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. C43400 is a copper-zinc-tin alloy that can be cold worked readily by all conventional processes. It has moderate strength and good ductility. This alloy is used typically for electrical switch parts, contacts and relay springs.