Copper Nickel Alloy 70/30 (Cu-Ni)
Marine Grade

Copper Nickel 70/30, also known as UNS C71500 or CW354H, is a copper alloy containing about 70% copper and 30% nickel with small additions of iron and manganese. Compared to Copper Nickel 90/10, the 70/30 grade offers greater mechanical strength, improved corrosion resistance, and excellent durability in highly aggressive environments such as fast-flowing seawater and chemical processing systems.

The key benefits of Copper Nickel 70/30 include outstanding resistance to pitting, crevice corrosion, biofouling, and stress cracking in both stagnant and turbulent seawater. It is stronger than CU-NI 90/10, performs reliably under thermal cycling, and is resistant to acidic and saline environments. Additionally, it has excellent weldability with minimal pre or post-heat treatment requirements, making it a reliable choice for marine and offshore installations.

Copper Nickel 70/30 is widely used in marine and shipbuilding industries for seawater piping, condenser plates, valves, and propeller sleeves. It is a preferred material in power plants for feedwater heaters, condensers, and cooling water lines, in desalination plants for brine heaters and evaporator shells, and in offshore oil and gas for firewater systems, risers, and deck piping. Defense and naval sectors also use it extensively for submarine systems and hull-mounted components due to its long term performance in harsh environments.

MOKSH TUBES & FITTINGS LLP offers a comprehensive range of Copper Nickel 70/30 products including seamless and welded pipes and tubes, sheets, plates, coils, strips, round bars, flats, hex bars, pipe fittings, flanges, fasteners, wires, and custom machined components. All materials are produced in compliance with international standards and can be customized in terms of size, thickness, and finish to meet specific project requirements.

MOKSH TUBES & FITTINGS LLP is a trusted manufacturer, supplier, and exporter of Copper Nickel 70/30 with extensive industry experience. The company provides marine-grade certified products from reputed mills, an extensive stock range, cut-to-size services, and global logistics support. With expertise in serving shipyards, EPC contractors, power plants, refineries, and defense projects, the company ensures high-quality CU-NI 70/30 products with full traceability and reliable performance.