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 321 is a titanium stabilized 18-10 stainless steel having a maximum operating temperature of 1650 F. It is recommended for welded equipment and structures.