FANSTEEL 77 METAL is a sintered high density alloy made by powder metallurgy methods for use as an inertial mass for gyroscope rotors, as a counterbalance material, as a radiation shield, and the like. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: W-1. Producer or source: Fansteel Metallurgical Corporation.