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.Project 70 and Project 7000 Type 304 stainless steel are versions of conventional AISI Type 304 (18Cr-8Ni) stainless steel having improved machinability and higher tensile and creep strengths.