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.NIROSTA 4520 is a ferritic stainless steel with both good general corrosion and resistance to chloride-ion stress corrosion cracking (SCC). The addition of titanium renders this alloy more resistant to intergranular attack (IGA), especially when used as welded tubing.