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.ANTIMONIAL LEAD ALLOYS are binary alloys containing from 1 to 12% antimony, balance lead. They are also called HARD LEAD, the antimony being used to increase the hardness and strength of lead.