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.PARALLOY CR39W is an austenitic heat resisting alloy with a combination of creep strength, carburization resistance and ductility. The alloy can be cast for fittings and centrifugally cast for tubing. Typical applications are within the petrochemical furnace arena.