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 No. C92700 is a cast copper-base alloy; it formerly was known as 88-10-2-0 alloy. It is characterized by a good combination of machinability, strength and resistance to corrosion. Among its many uses are bearings, pump impellers, piston rings and valve parts that are subject to liquid and or gas pressure and, therefore, must be sound (free from defects).