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.INCOR 18 and 21 are new permenent magnet materials; they are closely related to Incor 16 (Alloy Digest, Co-77, June 1981). Incor 18 and 21 are important to design engineers in many fields. They can be used to design motors that are smaller, lighter and more powerful than those made with conventional magnet materials. They also can be used to improve microwave tubes, magnetic drives and couplings and electronic devices. Incor 18 and 21, like Incor 16, can be used to lower size and weight in a wide range of other products where permanent magnets are used.