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Copper Forgings A copper forging is fabricated through a forming process that involves the plastic deformation of copper, a nonferrous material, under pressure and high temperatures through hammering and rolling. Since copper is a ductile metal offering high thermal and electrical conductivity, copper forgings can come in many different configurations including rod, bars, wire, sheets, strips, tubing and more. Some of the most common copper alloys used in forging applications are oxygen free electronic (OFE), naval brass, aluminum bronze, chromium copper, copper nickel and chromium zirconium copper. Forged copper provides an economical alternative to cast, welded and fabricated copper as well as offering a superior density and freedom from flaws. In addition, copper forgings have non-magnetic properties and non-sparking characteristics that are beneficial to industries such as electronics, automotive, mining, construction, aerospace, defense, material processing, architectural and industrial. Copper forgings offer high strength at low densities.
Copper forgings can be made through different forgings processes, depending on the type of copper alloy. The different copper alloys are typically divided into five categories: brass, a copper and zinc alloy; phosphor bronze, an alloy of copper with 3.5 to 10% of tin; aluminum bronze, aluminum is the main alloying metal added to copper; silicon bronzes, usually contains about 96 percent copper; and copper nickel and nickel silvers, with compositions from 10% nickel to 45% nickel. Copper alloys can be forged using closed die casting; they are melted and then cast continuously, centrifugally, or statically into a mold. Closed die forging involves the movement of metal blanks through a set of dies shaped in the required part design. Copper alloys can also forged using open die forging if they require mechanical deformation. Open die forging creates parts by the manipulation of the copper alloy through the die into the required shape. Copper alloys can be cold forged, warm forged or hot forged, depending on the composition of the specific alloy. In cold forging the copper alloy is not directly heated, but formed using high pressure. In hot forging the copper alloy is heated to high temperatures then formed. In warm forging the copper alloy is heated to a range that is typically above room temperature, but below the recrystallization temperature.
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