Copper Nickel Cu Ni 90/10 Tube Fittings

Copper Nickel Cu Ni 90/10 Tube Fittings are piping components manufactured from an alloy containing 90% copper and 10% nickel with trace additions of iron and manganese to enhance strength and erosion resistance. The alloy’s excellent resistance to seawater corrosion, biofouling, and stress related cracking makes these fittings an industry standard for shipbuilding, offshore oil & gas systems, seawater cooling loops, ballast systems, and desalination plants. They maintain high thermal conductivity, outstanding weldability, and mechanical stability, ensuring reliable service in both marine and industrial cooling water circuits.

Reputable manufacturers produce fittings to meet ASTM B466/B467, ASME SB466, EN 12451, and MIL T 16420 requirements, ensuring proper chemical composition, mechanical strength, and dimensional accuracy. Certifications such as EN 10204 3.1 provide full material traceability, a critical factor in B2B supply chains for shipyards, naval defense projects, and offshore installations. Meeting these standards guarantees compatibility with Cu Ni piping, predictable performance, and compliance with marine class society approvals.

Cu Ni 90/10 exhibits a self passivating oxide layer that protects against chloride attack and biofouling, outperforming carbon steels, brasses, and many stainless steels in continuous seawater exposure. Its low macrofouling rate minimizes chemical cleaning, while high resistance to impingement attack allows use at flow velocities up to ~3.5 m/s. The alloy combines ductility, ease of fabrication, and superior thermal conductivity, making it ideal for condenser tubes, heat exchangers, and fire mains. The result is lower lifecycle cost and extended asset life for capital intensive projects.