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.MUELLER ALLOY No. 3600 (formerly MBCo Alloy 201) is a copper-zinc alloy containing lead to give it excellent free-cutting characteristics. It has desirable mechanical properties and good resistance to corrosion.