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. 858 is a copper-zinc-tin-lead (yellow brass) alloy for die castings. It is a low-cost, general-purpose alloy with good machinability and soldering characteristics. Its many uses include general and marine hardware, pump, impellers, plumbing parts and gears.