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.Carlson Alloy 303 is an austenitic chromium-nickel stainless steel to which elements such as sulfur have been added to improve machinability and nonseizing characteristics. The steel is the most readily machinable of all austenitic chromium-nickel grades and is suitable for automatic screw machines.