UNS C71500, Ni 70%, Cu 30%
UNS C70600, Ni 90%, Cu 10%
Copper Nickel Tube, various high efficient heat exchanging tubes, brass tubes
Cupronickel (Sometimes incorrectly written as Cupernickel) or Coppernickel is an alloy of copper, nickel and strengthening impurities, such as iron and manganese. Cupronickel does not corrode in seawater, because its electrode potential is adjusted to be neutral with regard to seawater. Because of this it is used for marine hardware, and sometimes for the propellers, crankshafts and hulls of premium tugboats, fishing boats and other working boats.