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.COOPER Alloy PH-55A comprises three grades each of which offers a different combination of corrosion resistance, high hardness, high strength and machinability. They were developed to meet the combined requirements of high corrosion, abrasion and erosion resistance. They maintain their corrosion and wear properties at elevated temperatures (1000 to 1400 F).