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.Carpenter Project 70+ Type 303 stainless is a modified version of Carpenter Stainless No. 8. The alloy is a hardenable austenitic chromium-nickel steel and is a good general-purpose product for simple and complex parts.