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.Magnifer 4008 is a soft-magnetic alloy with 40% Ni and 8% Cr. The alloy has high permeability values and good corrosion resistance.