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.NAS 64 is a duplex stainless steel with molybdenum for pitting and crevice corrosion resistance and for resistance to stress corrosion cracking a duplex microstructure.