EIGILOY is a cobalt-base alloy that is characterized by high tensile and fatigue strength and good corrosion resistance. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Co-4. Producer or source: Elgiloy Company. Originally published August 1953, revised November 1971.