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.J&L type 201 stainless steel is an austenitic alloy with approximately 6.5% manganese. The nickel and chromium contents are lower than typical to allow more work hardening and to obtain high tensile strengths with excellent ductility.