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.MU GUARD 80 is a nickel-iron-molybdenum alloy. It is furnished in strip and foil form and provides optimum initial and maximum permeabilities for electromagnetic shielding applications. It is a high purity, soft magnetic alloy produced by powder metallurgy techniques.