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.Brush Alloy M220C is a betyllium-nickel casting alloy that responds to an age-hardening heat treatment and is characterized by high strength thermal conductivity combined with excellent corrosion, oxidation and wear resistance. It is recommended for mold tooling in the glass industries.