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.Developed in 1978, clean-cut carbon steels provide free-machining characteristics and are available in two carbon levels as Clean-Cut 20 and Clean-Cut 45.