AMPCO M-4 is a copper-aluminum-nickel-iron-manganese alloy that possesses high hardness, high strength, good resistance to fatigue and wear, and excellent resistance to corrosion. It is used in both cast and wrought forms. Typical applications include marine hardware, aerospace components, wear plates, gears, bushing and pickling equipment. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, forming, heat treating, machining, and joining. Filing Code: Cu-469. Producer or source: Ampco Metal Inc..