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.FREE-CUTTING BRASS is a highly leaded copper-zinc alloy, combining free-machining characteristics with good mechanical and corrosion resistant properties, suited to high production in automatic screw machines.