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.ARMCO 18-2 Mn is a low-nickel austenitic stainless steel that has a yield strength approximately twice that of Type 304 stainless steel as well as comparable corrosion resistance.