Carlson Alloy 90 10 Cu Ni is a copper-based alloy developed as a cost-effective substitute for 70 30 Cu Ni. An addition of approximately 1.4% iron was made to increase its resistance to general corrosion, erosion and impingement corrosion resulting form the turbulent flow of water containing air bubbles and silt flowing at a high velocity. 90 10 Cu Ni has good strength at moderately elevated temperatures. It can be fabricated by both hot and cold-working procedures, and is readily weldable.

90 10 Cu Ni has excellent resistance to corrosion by fresh water, brackish water, and sea water. It is not recommended for usage in heavily polluted water containing sewage and industrial wastes. 90 10 Cu Ni resists attack by phosphoric, sulfuric, and mild organic acids. It is attacked by chromic, hydrochloric and nitric acids. 90 10 Cu Ni is also resistant to the alkali chlorides, nitrates, sulfates and to ammonia and ammonium compounds.

Applications

90 10 Cu Ni is widely used in marine service, offshore platform sea water piping, tidewater power plants, desalination plants, oil refineries, and in the chemical process industry.

Product applications include condenser tubes and plates, distiller tubes, tube sheets and baffles for condensers and heat exchangers, evaporator and heat exchanger tubes, salt water piping, water boxes, ship hulls and hot water tanks.

Information provided by Carlson