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.Permendur 49 is an alloy with nominal composition 49% cobalt, 49% iron and 2% vanadium which combines high saturation with high permeability. It can be supplied as forged section, or strip normally in the range 0.1 to 1.0 mm (0.004 to 0.94 in.) thickness.