Brass is an alloy composed of copper and zinc. Brass composed of copper and zinc is called ordinary brass, and an alloy composed of two or more elements is called special brass or complex brass .Commonly added elements include lead, tin, aluminum, etc., which can be called lead brass, tin brass, and aluminum brass accordingly. The main purpose of adding alloying elements is to increase the tensile strength and improve the processability.The parts produced by CNC machining of Brass prototype cnc machining are of high quality and stable.