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70 30 Copper Nickel Supplier and Manufacturer, CuNi 70 30

70 30 Copper Nickel Alloy • EN 12164


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UNS C71500 • CuNi30Mn1Fe • CuNi 70 30 Supplier

70 30 CuNi Alloy developed to work in offshore and Marine Applications

Siddhagiri Metals and Tubes has been supplying Copper Nickel Alloy for more than 25 years and has developed the resources, skills and inventory to satisfy the critical needs of our client's across the globe. We specialise in Copper-Nickel Alloys, Nickel Alloys and Stainless Steel products that have applications across a multitude of markets and industries.

Copper-nickel alloys were developed specifically for seawater service. Cupro Nickel Alloys are currently used in sizeable quantities for Offshore, Power, Desalination, Marine, Chemical Processing, Petrochemical & Refining and Oil & Gas industries. 70/30 is best renowned for its excellent corrosion and erosion resistance, especially in marine environments. The corrosion resistance of 70 30 CuNi is improved to 4.5m/s in higher velocity waters and polluted seawater.

CuNi 70 30 is composed of 30% Nickel, 0.7% Iron, 1.0% Manganese and remainder as Copper. The most popular specifications covering this 70 30 Copper-Nickel are UNS C71520, UNS C71500, DIN 2.9882, SAE J461, SAE J463, CW354H, BS 2874, EN 12164, dgs320, CuNi30Mn1fe.

70 30 CuNi alloy or UNS C715000 is used in areas where stainless steel cannot be used due to chloride stress-corrosion cracking and in other parts requiring high corrosion resistance. These alloys are also used as machined and forged valve and pump parts that are utilised for seawater services.

Industry Names: Copper Nickel Alloy, 70 30 CuNi,
Specifications: UNS C71520, UNS C71500, SAE J461, SAE J463, CW354H, BS 2874, CuNi30Mn1fe, DIN 2.9882, EN 12164
Applications: Seawater Piping Systems, Desalination,
Features: Sea-Water Resistant, Anti-Bacterial, Corrosion Resistant, High-Strength as compared to CuNi 90 10

Siddhagiri Metals and Tubes supplies an array of CuNi 70 30 products such as pipe and tubes, flanges, fittings, fasteners, bar, wire mesh, sheet and plates for use in Industrial Pumps, Condenser Plates, Refrigerators, Process Equipment, Ferrules, Flexible Metal Hose, Weld Wire, Boiler Parts, Condensers, Heat Exchanger Components, Flanges for marine use, Salt Water Piping, Seawater Service, Seawater Condensers and Salt-Water Pipe Fittings.


Siddhagiri Metals and Tubes offers 70 30 Copper Nickel Alloy for use in seawater and any industrial, commercial or residential application. Siddhagiri Metals and Tubes is the single source for high-quality CuNi products such as pipe, tube, fititngs, sheet, plate, fasteners, wire mesh, etc.
Other Names: CuNi 70 30, UNS C71500, UNS C71520, SAE J461, SAE J463, CW354H, DIN, 2.9882, EN 12164
Category: Copper-Nickel > 70 30 CuNi
Material: Copper Nickel | Corrosion Resistant | Seawater Resistant Alloy
Brand: Siddhagiri Metals and Tubes
Manufacturer: Siddhagiri Metals and Tubes
Rating: 3.8/5 based on 86 customer reviews

70 30 CuNi Specifications and Standards

Grade North America Germany Russia European British Other Names
Copper Nickel 70 30 UNS C71500 WNR/DIN 2.9882 GOST V 17646-78 EURONORM CuNi30Mn1Fe BS 2874 CuNi 70 30, SAE J461, SAE J463, CW354H, EN 12164

Properties of 70 30 CuNi

  • Chemical Properties
    Cu Pb Mn Fe Zn Ni
    MIN 65.000 - - 0.400 - 29.000
    MAX 0.500 1.000 1.000 1.000 33.000
  • Mechanical Properties
    Yield Strength
    0.2% Proof
    (MPa)
    Tensile strength
    (MPa)
    Elongation
    (% in 50mm)
    Hardness
    (HRB)
    MIN 88 372 45.00  
    MAX 483 517   51
  • Physical Properties
    Density kg/dm³ 8.95
    Melting Range °C 1170-1240
    Specific Heat J/kg °K 377
    Thermal Conductivity W/m°K 29
    Coeff. of Linear Expansion 10-300°C" 10-6/°K 16
    Electrical Resistivity microhm. cm 34
    Modulus of Elasticity GPa 152
    Modulus of Rigidity GPa 56

Forms of 70 30 CuNi

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