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Copper Forging Advantages

Copper forging offers a number of advantages over copper products made by other processes (such as copper casting). Dimensional precision is greater than by casting, working the alloys develops improved strength, and overall cost is modest. Zero draft forgings are possible, though not always practical. However, minimum draft forgings are being produced. Minimum draft capability is independent of alloy composition; alloys that can be forged by conventional means can be forged to minimum draft angles approaching 1°.

copper forging advantagesCopper forgings are common and provide near-net shape parts with minimal waste. Copper forgings mainly include brass forging whose major alloying element is zinc, and bronze forging whose major alloying element is other than zinc, such as silicon bronze and aluminum bronze. Pour copper contains very high copper content, typically 98% or more, such as beryllium copper. Copper based alloys are designated by a six-character alpha-numeric system. The first character is C, indicating the copper base. The next five are numeric characters. The first numeric indicates the major group, and the remaining four designate the alloys within the group.

Copper forgings are corrosion resistant and pressure tight, and have a wide of industrial application, specified for high pressure liquid and gas handling applications such as fittings, plumbing hardware, refrigeration components and commercial valves. Strength is enhanced by the deformation that takes place in forging, making high strength brass forgings the choice in certain gears, bearings and hydraulic pumps. The homogeneous, porosity free structure of brass forgings makes them the ideal starting point for highly polished decorative door hardware and plumbing components.

Copper based alloys have been rated for forgeability, taking into account factors such as required forging pressure, die wear and hot plasticity. Forging brass, C37700, is the most forgeable and is rated at 100%. Brasses containing 35% to 40% zinc are rated at 90%, and coppers, with 99.9% minimum copper are rated at 65%. Silicon bronze, C65500, is the least forgeable at 40%.

Last advantage of copper forging is that, it can be easily cleaned after forging and trimming by using a chemical processes or by other more environmentally friendly methods. Typical forging grades in CFS Drop Forging include: 

      Copper Alloys
                                                     Composition
           C37700
                                             59% Cu, 39% Zn, 2% Pb
           C46400
                                          60% Cu, 39% Zn, 0.75% Sn
           C63000
                                 81% Cu, 10% Al, 5% Ni, 3% Fe, 1% Mg
           C64200 
                                            91% Cu, 7.2% Al, 1.8% Si
           C67700
65% Cu, 23% Zn, 4.5% Al, 4% Mn, 3% Fe, 0.5% Sn


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