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.MAR-M 302 is a cast cobalt-base alloy having superior oxidation and thermal shock resistance. It was designed primarily for use as a first stage turbine vane to operate in the temperature range of 1500-2000 F.