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 201 stainless steel is a non-hardenable austenitic chromium-nickel-manganese stainless steel that is capable of easily attaining high tensile strengths while maintaining excellent ductility when moderately or severely cold worked.