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 Vacumet HyMu 800 is a vacuum melted nickel-molybdenum-iron alloy recommended as strip for laminations or torroids with a minimum permeability of 65,000 at 40 gauss in strip 0.010-0.001 inch thick.