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.BALCO is a nickel-iron alloy recommended for applications operating in air at 1100 deg. F. It is used in electrical instruments and controls such as resistance thermometers and ballistic devices.