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.ALLOY M252 is a high-strength nickel-base forging alloy recommended for heavy duty jet engine and gas turbine buckers. (This alloy is a General Electric Companty patent.).