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.Uginox R25-20 is an austenitic heat-resistant stainless steel with good oxidation resistance due to its 25% Cr content. The alloy is frequently used in the heat treating industry.