MUELLER Alloy 6680 is a non-leaded copper-base alloy (manganese bronze) with relatively good ductility and fair machinability. It can be used with soft or hard mating members where moderate strength is sufficient. It can be joined successfully by silver soldering or soft soldering. Its many uses include bearings, gears, pump parts, connecting rods, marine hardware and bushings. 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: Cu-491. Producer or source: Mueller Brass Company.