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.Hiperco 27 is an iron-cobalt type of soft magnetic material recommended for use in motors, generators, transformers and relays and at temperatures above 950 F. It is used for high flux levels.