CuNi Alloy
Copper-nickel alloys
Copper-nickel alloys, also known as Cu-Ni alloys, are composed primarily of copper and nickel, with trace amounts of other elements like iron and manganese. These alloys are recognized for their high strength, excellent corrosion resistance, low electrical resistance, and favorable thermoelectric properties. They are especially known for reducing the temperature coefficient of resistivity, making them superior to many other copper alloys in mechanical and physical performance. CuNi alloys feature excellent ductility, high hardness, attractive appearance, resistance to corrosion, deep drawing capabilities, and good performance at both room temperature and high temperatures. Furthermore, they offer excellent machinability, weldability, and are non-magnetic.
Available grades: CuNi1, CuNi2, CuNi6, CuNi8, CuNi10, CuNi14, CuNi19, CuNi23, CuNi30, CuNi34, CuNi44
- Exceptional performance in seawater, chloride solutions, and other corrosive environments, resisting pitting and crevice corrosion
- Suitable for applications requiring significant load-bearing capacity or high pressure
- Easily welded, cold-processed, hot-processed, and forged, facilitating the production of complex parts
- Ideal for high-speed motion and high-friction environments, reducing wear and fatigue damage
- Low magnetic permeability, which is crucial for applications sensitive to magnetic fields
- Stable electrical resistance and excellent conductivity with low temperature coefficients
- Resistant to microorganisms and algae growth, especially beneficial in long-term water-contact applications
- Marine engineering: Used in shipbuilding, offshore platform construction, and heat exchangers for desalination plants
- Chemical industry: Utilized in the manufacture of reaction vessels, piping, and other equipment exposed to chemicals
- Power and energy: Found in cooling system components for nuclear and thermal power plants
- Oil and gas extraction: Applied in oil well tubing, subsea pipelines, and other components exposed to harsh conditions
- Aerospace: Used for various aircraft structural parts and engine components
- Telecommunications: Employed in antenna coils, magnetic cores for electronic circuits, and small transformers
- Medical equipment: Used in non-magnetic components of medical machines such as MRI scanners
- Plate / Sheet
- Thickness: 0.2mm-100mm
- Width: 50mm-2000mm
- Size: Standard size (e.g. 1000mm×2000mm, 1200mm×2400mm), or customizable
- Rod
- Diameter: 2mm-250mm
- Length: 1m-6m, or customizable
- Wire
- Diameter: 0.01mm-8mm
- Wire Type: Bright shiny wire, annealed wire, etc.
- Tube
- Outer Diameter: 3mm-500mm
- Wall Thickness: 0.5mm-50mm
- Length: 1m-6m, or customizable
- Strip
- Thickness: 0.01mm-0.2mm
- Width: 5mm-300mm
| Grades | NC003 | NC005 | NC010 | NC012 | NC015 | NC020 | NC025 | NC030 | NC035 | NC040 | NC050 | |
| Main Chemical Composition (%) | Nickel (Ni) | 1 | 2 | 6 | 8 | 10 | 14.2 | 19 | 23 | 30 | 34 | 44 |
| Manganese (Mn) | / | / | / | / | / | 0.3 | 0.5 | 0.5 | 1 | 1 | 1 | |
| Copper (Cu) | Rest | Rest | Rest | Rest | Rest | Rest | Rest | Rest | Rest | Rest | Rest | |
| Grades | NC003 | NC005 | NC010 | NC012 | NC015 | NC020 | NC025 | NC030 | NC035 | NC040 | NC050 |
| CuNi1 | CuNi2 | CuNi6 | CuNi8 | CuNi10 | CuNi14 | CuNi19 | CuNi23 | CuNi30 | CuNi34 | CuNI44 | |
| Max. Service Temperature (°C) | 200 | 200 | 220 | 250 | 250 | 300 | 300 | 300 | 350 | 350 | 400 |
| Density (g/cm³) | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 |
| Resistivity at 20℃ (μΩ·m) | 0.03±10% | 0.05±10% | 0.10±10% | 0.12±10% | 0.15±10% | 0.20±5% | 0.25±5% | 0.30±5% | 0.35±5% | 0.40±5% | 0.5±5% |
| Resistance Temperature Coefficient ×10⁻⁶/ºC (20~600ºC) | <100 | <120 | <60 | <57 | <50 | <38 | <25 | <16 | <10 | 0 | 210 |
| Tensile Strength (Mpa) | >210 | >220 | >250 | >270 | >290 | >310 | >340 | >350 | >400 | >400 | >420 |
| Elongation at Rupture (%) | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 |
| Melting Point (°C) | 1085 | 1090 | 1095 | 1097 | 1100 | 1115 | 1135 | 1150 | 1170 | 1180 | 1280 |
| Thermoelectric Potential of Copper (μV/℃) (0~100℃) | -8 | -12 | -18 | -22 | -25 | -28 | -32 | -34 | -37 | -39 | -43 |
Our production adheres to JIS G4313 standards, ensuring compliance with international quality benchmarks.
Equivalent overseas standards are listed for reference.
- ISO 13380, 197-6
- ASTM B111, B151, B466, B122
- DIN 86019, 17664
- EN 12449, 12451
- GB/T 5231, 8890, 2059
