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.Ferrium S53 was developed for use as a structural stainless steel for aircraft landing gear. Ferrium S53 has a corrosion resistance equivalent to 15-5PH H900, strength equivalent to or better than 300M (AMS 6257A) and SAE 4340 (see Mechanical Properties), optimum microstructural features for maximum fatigue resistance, and a surface hardenability to greater than 67 HRC for wear and fatigue.