Copper alloy is a type of metal composed of copper and other elements. Monel is an alloy of nickel and copper, and is known for its strength and corrosion resistance. BRASS is an alloy of copper and zinc, and is used in many applications such as musical instruments and plumbing fixtures. Gunmetal is an alloy of copper, tin, and zinc, and is used for its hardness and corrosion resistance. BRONZE is an alloy of copper and tin, and is used for its strength and durability. Oroide is an alloy of copper and zinc, and is used for its malleability and corrosion resistance. Tambac is an alloy of copper and zinc, and is used for its strength and corrosion resistance.