C71500 Copper Nickel 70/30


Cupronickel or copper-nickel is an alloy of copper that contains nickel and strengthening elements,
such as iron and manganese. cupronickel is highly resistant to corrosion in seawater, because its electrode
potential is adjusted to be neutral with regard to seawater. Because of this, it is used for piping, heat exchangers and condensers in seawater systems, as well as marine hardware, and sometimes for the propellers, crankshafts and hulls of premium tugboats, fishing boats and other working boats.

Condenser tubes of this alloy are giving long and dependable service at sea. It is also highly
satisfactory for tubes in evaporators, inter-after condensers, air ejectors of steam condensers and in boiler
feedwater heaters. This alloy is particularly desirable where high temperatures are encountered. It has the
property of forming protective films of corrosion products, making it particularly desirable for service where water velocities are high.

Copper nickel 70-30% 715 is one of the most corrosion resistant and durable of the copper-base alloys
for condenser and heat exchanger tubes in sea water. In high pressure, high-temperature steam stations, copper nickel 70-30% tubes are used in feedwater heaters regardless of the type of tube used in the main condensers.

Ameritube has been providing C71500 Copper Nickel 70/30 according to the following standards:

  • ASME SB-111
  • ASME SB-466
  • ASTM B-111
  • ASTM B-466
  • MIL-T-15005f
  • MIL-T-16420k Class 200, 700, 1650, 3300, and 6000