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.CARPENTER NIMARK 250 is a vacuum-melted, low-carbon nickel-cobalt-molybdenum maraging steel in which yield strengths in excess of 240,000 psi can be developed by a simple aging treatment following a solution anneal.