MUELLER 721 is one of the strongest of all nonferrous alloys, having high tensile properties and superior corrosion resistance. It is recommended for gears, bearings, valve stems and screw machine products. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-167. Producer or source: Mueller Brass Company.