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.PYROMET 680 is a nonmagnetic nickel-base alloy that derives its exceptional properties up to 2200 F (1200 C) from solid solution strengthening. Among its applications are gas turbine components and furnace hardware.