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.Allegheny Ludlum Moly Permalloy is a nickel-iron-molybdenum alloy having excellent permeability and core loss properties. It has high initial and maximum permeability, low coercive force, and low hysteresis loss. It is recommended for toroids, tape and lamination cores.