Copper-nickel (also known as cupronickel) alloys are widely used for marine applications due to their excellent resistance to seawater corrosion, low macrofouling rates, and good fabricability. They have provided reliable service for decades while offering effective solutions to today's technological challenges. They are also used for hydraulic tubing, including brake tubing. Seawater cooling and firewater systems, heat exchangers, condensers and piping, platform riser and leg sheathing, boat hulls, oil coolers, hydraulic tubing, antimicrobial touch surfaces. Forgings, cast seawater pumps and valve components.