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.AISI Type 204 is a chromium-nickel-manganese type stainless steel comparable in properties to Type 304 stainless steel. It is austenitic, non-magnetic, and highly corrosion resistant.