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.Carpenter type 204-Cu is a low-nickel, Manganese containing, austenitic stainless steel with copper. The copper provides a reduced work hardening rate for superior forming when compared to other 200 series stainless steels.