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.Grade G4827 is an iron-chromium-nickel-niobium (columbium) corrosion and heat resisting casting especially useful for applications involving long exposures to high temperatures or field welding.