AMPCOLOY 66 is a copper-zinc-aluminum-manganese-iron alloy; it is classified as a high-strength yellow brass (manganese bronze). It has an excellent combination of strength and ductility along with good resistance to corrosion. Its many uses include bearings, gears and marine hardware. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-383. Producer or source: Ampco Metal Inc..