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.NeIGT 27 and 35 are high energy density, sintered permanent magnet iron, neodymium, boron alloys. They are ideal where space and weight reductions must be combined with high performance permanent materials.