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.AISI 3150 is a medium carbon, chromium-nickel alloy steel having great depth hardness, high elastic properties and excellent fatigue resistance and toughness.