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.Nitralloy 5Ni-2A1 is a precipitation hardening grade of nitriding alloy steel having high core hardness and toughness. It is recommended for parts requiring fatigue and wear resistance, such as gears, cams and shafts.