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.CUNIP is a copper-nickel-phosphorus age-hardenable alloy which combines high strength with good electrical and thermal conductivities. It may be cold worked either before or after age hardening. Its many uses include electron-tube components, fuse springs and electrical connectors.