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 31 is an iron-chromium-molybdenum casting alloy having good resistance to oxidation at temperatures up to about 1200 F. It is recommended for furnace parts and oil refinery equipment.