Free-machining brasses Brass is a metal alloy made of copper and zinc. The presence of other elements in brass such as lead is often required to improve machinability. The superior machinability of brass is ideal for producing parts that are used in a variety of applications including valves, fittings and electrical components. The most commonly used, free-machining brass is UNS alloy C36000. In some applications such as potable water systems, federal and state regulations restrict the use of lead. This may require the specification of low or lead-free brasses. Some lead-free brasses rely on elements other than lead to improve machinability and other properties such as strength, hardness and corrosion resistance. The importance of scrap The entire economy of the brass industry is dependent on the economic recycling of surplus material, or scrap. Brass for extrusion and hot forging is normally made from a basic melt of scrap of similar composition adjuste...
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