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.NDS is an oil-hardening steel for use in tools, dies and machine parts requiring a good combination of hardness, toughness, and wear resistance. The relatively large percentage of nickel contained in this grade produces an alloy with greater toughness than the standard oil-hardening types while retaining the necessary hardness and wear resistance. NDS is well suited for cold-work applications requiring this extra toughness. Such applications include punches, dies and cold-forming rolls.