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 Project 70+ 15Cr-5Ni is a modified version of Type 15Cr-5Ni stainless steel with improved machinability. The material meets all aspects of the aerospace specification AMS 5659.