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.Udimet B is a series of four 18%-nickel steels of ultra high strength and good toughness at room and at elevated temperatures. They are easily fabricated and weldable, and are recommended for the aircraft and missile industries for high temperature components.