CuNi resistance alloy

Copper-nickel alloy (Cu-Ni), often called white copper in China, is mainly composed of copper and nickel, and contains small amounts of iron and manganese. These alloys offer extremely high strength, excellent corrosion resistance, low resistivity, and good thermoelectric properties. They significantly reduce the temperature coefficient of resistance and have mechanical and physical properties superior to most other copper alloys. CuNi alloy has excellent ductility, high hardness, beautiful appearance, excellent corrosion resistance, and supports deep drawing processing, showing good performance at both normal and high temperatures. In addition, they offer excellent machinability, weldability, and are non-magnetic.

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CuNi30

* Jiangsu DZX Technology Co., Ltd. – a professional manufacturer of special alloys that supports Jiangsu shipments and nationwide logistics and distribution.

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Copper-Nickel Alloy

CuNi30

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✓ ISO 9001 Quality
✓ COC & Test Certificates
✓ Established in 2002
✓ OEM & Custom Sizes
Specifications
  • Plate / Sheet Plate / Sheet
    Thickness: 0.2mm-100mm
    Width: 50mm-2000mm
    Size: Standard size (e.g. 1000mm×2000mm, 1200mm×2400mm), or customizable

  • Rod Rod
    Diameter: 2mm-250mm
    Length: 1m-6m, or customizable

  • Wire Wire
    Diameter: 0.01mm-8mm
    Delivery Forms: Bright shiny wire, annealed wire, etc.

  • Tube Tube
    Outer Diameter: 3mm-500mm
    Wall Thickness: 0.5mm-50mm
    Length: 1m-6m, or customizable

  • Strip Strip
    Thickness: 0.01mm-0.2mm
    Width: 5mm-300mm

Chemical Composition
  • Nickel (Ni): 30
  • Manganese (Mn): 1
  • Copper (Cu): Rest
Physical & Mechanical Properties
  • Grade: NC035, CuNi30
  • Max. Service Temperature (°C): 350
  • Density (g/cm³): 8.9
  • Resistivity at 20℃ (μΩ•m): 0.35±5%
  • Resistance Temperature Coefficient ×10⁻⁶/ºC (20~600ºC): <10
  • Tensile Strength (Mpa): >400
  • Elongation at Rupture (%): >25
  • Melting Point (°C): 1170
  • Thermoelectric Potential of Copper (μV/℃) (0~100℃): -37
Supply Capability
ItemDetails
Lead TimeSamples 5-10 days; production 15-30 days
MOQSmall trial orders accepted
SamplesAvailable on request
PackagingExport-standard coil spools / wooden cases
CertificateCOC with chemical composition analysis
PaymentT/T, L/C
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Project Support

Need this alloy for a demanding application?

Real-world qualification for the Marine & Offshore sector: tight tolerances, batch consistency and on-time delivery.

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Frequently Asked Questions (FAQ)

What is the overall positioning of CuNi30? Which industries are it mainly used in?

The page positions it as a high-nickel copper-nickel alloy: 30% nickel, 1% manganese, with a tensile strength greater than 400MPa. The introduction text clearly points out the two major destinations of “shipbuilding and industrial resistor manufacturing”. The characteristics of white copper’s resistance to seawater and chloride corrosion are more fully reflected in the 30% nickel grade, and it is often requested by the marine and resistor industries.

The page positions it as a high-nickel copper-nickel alloy: 30% nickel, 1% manganese, with a tensile strength greater than 400MPa. The introduction text clearly points out the two major destinations of “shipbuilding and industrial resistor manufacturing”. The characteristics of white copper’s resistance to seawater and chloride corrosion are more fully reflected in the 30% nickel grade, and it is often requested by the marine and resistor industries.

The page positions it as a high-nickel copper-nickel alloy: 30% nickel, 1% manganese, with a tensile strength greater than 400MPa. The introduction text clearly points out the two major destinations of “shipbuilding and industrial resistor manufacturing”. The characteristics of white copper’s resistance to seawater and chloride corrosion are more fully reflected in the 30% nickel grade, and it is often requested by the marine and resistor industries.

CuNi23 nickel 23%, resistivity 0.30±5%, maximum 300℃, tensile strength greater than 350MPa; CuNi30 nickel 30%, resistivity 0.35±5%, maximum 350℃, tensile strength greater than 400MPa. If the temperature resistance strength requirement is high, choose CuNi30. CuNi23 is also sufficient for normal working conditions within 300℃.

The outer diameter of the pipe is 3-500mm, the wall thickness is 0.5-50mm, and the length is 1-6m. It supports cutting on demand. The 30% nickel grade has a tensile strength greater than 400MPa and an elongation greater than 25%. Combined with the seawater resistance and biological adhesion resistance of white copper, it is suitable for marine seawater systems and cooling and heat exchange pipelines. Just report the specifications according to the system pressure and flow rate.

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