CuNi2Si copper alloy is an alloy of copper with a mixture of nickel and silicon. This alloy is mainly used in the aircraft industry, in the manufacture of components such as pistons, valves and tubes. This alloy has superior mechanical strength, excellent corrosion resistance, heat resistance and good fatigue resistance. It also offers good weldability, oxidation resistance and excellent sliding properties. In addition, this alloy is considered very versatile and is used in a wide range of industrial applications.