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.ESCO Alloy 12M is a low alloy, medium carbon content, hard, shock and impact-resisting steel recommended for heavy duty cast parts. Minor chemical composition variations and heat treatment are employed in order to develop specific properties. This alloy possesses exceptional toughness at low temperatures.