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.CANNON-MUSKEGON 4140 is a medium-carbon cast alloy steel with good hardenability, strength and toughness. It is used in large quantities in the investment casting industry. A higher silicon content is permissible in this steel than in AISI 4140 (wrought) alloy steel.