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.DURIMET 20 is a special austenitic stainless steel alloy of nickel, chromium, molybdenum, and copper. It is highly resistant to hot and cold strong acids and is supplied in the form of castings to the grade CN7M.