High Performance CuNi Alloy CuNi34 NC040 Best Choice for Demanding Applications
High-Performance CuNi Alloy CuNi34 NC040 The Best Choice for Demanding Applications
CuNi34/NC040 Wire is a high-performance copper-nickel alloy consisting of approximately 34% nickel and 66% copper, offering superior corrosion resistance, mechanical strength, and thermal stability. This alloy is particularly suitable for applications in harsh environments such as marine, chemical processing, and high-temperature industries, where durability and resistance to chemical and physical stresses are essential.
CuNi34/NC040 Wire is a premium copper-nickel alloy offering exceptional corrosion resistance, mechanical strength, and thermal performance. It is an excellent choice for demanding applications in marine, chemical processing, power generation, and automotive industries. Although it is more expensive than lower nickel alloys, its ability to withstand harsh environments and provide reliable, long-lasting performance makes it a valuable material for critical applications. Whether in seawater systems, heat exchangers, or industrial piping, CuNi34 delivers unmatched reliability and durability.
| Chemical Composition Wt.% | % | Ni | Cu | Mn |
| Min | ||||
| Max | 34 | Rest | 1 |
Main physical properties:
| Max continuous operating temperature ℃ | 350 |
| Resistance temperature coefficient x 10-5/℃(20℃-600℃) | <0 |
| Thermovoltage to copper at 20℃ in μV/K | -39 |
| Thermal expansion coefficient ×10-6/K(20℃-400℃) | 16.0 |
| Thermal conductance at 20℃ W/mK | 25 |
| Specific heat capacity at 20℃ J/gK | 0.40 |
Main technical data
| Type |
CuNi1 NC003 |
CuNi2 NC005 |
CuNi4 NC007 |
CuNi6 NC010 |
CuNi8 NC012 |
CuMn3 MC012 |
CuNi10 NC015 |
CuNi14 NC020 |
CuNi19 NC025 |
CuNi23 NC030 |
CuNi30 NC035 |
CuNi34 NC040 |
CuNi44 NC050 |
|
| Composition(%) | Cu | Rest | Rest | Rest | Rest | Rest | Rest | Rest | Rest | Rest | Rest | Rest | Rest | Rest |
| Mn | / | / | / | / | / | 3 | / | 0.3 | 0.5 | 0.5 | 1.0 | 1.0 | 1.0 | |
| Ni | 1 | 2 | 4 | 6 | 8 | 10 | 14.2 | 19 | 23 | 30 | 34 | 44 | ||
| Max.continuous operating temperature(℃) | 200 | 200· | 200 | 220 | 250 | 200 | 250 | 300 | 300 | 300 | 350 | 350 | 400 | |
| Resistivity at 20℃(μ m) | 0.03 ±10% |
0.05 ±10% |
0.07 ±10% |
0.10 ±10% |
0.12 ±10% |
0.12 ±10% |
0.15 ±10% |
0.20 ±5% |
0.25 ±5% |
0.30 ±5% |
0.35 ±5% |
0.40 ±5% |
0.49 ±5% |
|
| Resisitance-temperature coefficient 20-600℃ (×10-5/℃) | ＜ 100 | ＜ 120 | ＜ 50 | ＜ 60 | ＜ 57 | ＜ 38 | ＜ 50 | ＜ 38 | ＜ 25 | ＜ 16 | ＜ 10 | ＜ -0 | ＜ -6 | |
| Thermovoltage to copper at 20℃ in (μV/K) |
-8 | -12 | -12 | -18 | -22 | 1 | -25 | -28 | -32 | -34 | -37 | -39 | -43 | |
| Mean coefficient of linear thermal expansion, in (10-6/K) , at a temperature between 20 ℃ and 400 ℃ | 17.5 | 17.5 | 17.5 | 17.5 | 17.5 | 18 | 17.5 | 17.5 | 17.5 | 17.5 | 17.0 | 16.0 | 15.0 | |
| Thermal conductance at 20℃ (W/mK) |
145 | 130 | 130 | 92 | 75 | 84 | 59 | 48 | 38 | 33 | 27 | 25 | 23 | |
| Specific heat capacity at 20℃ in (20℃ J/gK) | 0.38 | 0.38 | 0.38 | 0.38 | 0.38 | 0.39 | 0.38 | 0.38 | 0.38 | 0.38 | 0.39 | 0.40 | 0.41 | |
| Density at 20 ℃(g/cm3) | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.8 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | |
| Melting temperature in (℃) | 1085 | 1090 | 1090 | 1095 | 1097 | 1050 | 1100 | 1115 | 1135 | 1150 | 1170 | 1180 | 1280 | |
| Min.tensile strength in (N/mm2) | 210 | 220 | 220 | 250 | 270 | 290 | 290 | 310 | 340 | 350 | 400 | 400 | 420 | |
| Elongation(%) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | |
Technical data table
| Diameter(mm) | NC003 CuNi1 | NC005 CuNi2 | NC007 CuNi4 | NC010 CuNi6 | NC012 CuNi8 | NC015 CuNi10 | NC020 CuNi14 | NC025 CuNi19 | NC030 CuNi23 | NC035 CuNi30 | NC040 CuNi34 | NC050 CuNi44 |
| 0.10 | 3.82 | 6.36 | 8.91 | 12.73 | 15.28 | 19.09 | 25.46 | 31.83 | 38.19 | 44.56 | 50.93 | 62.39 |
| 0.11 | 3.16 | 5.26 | 7.37 | 10.52 | 12.63 | 15.78 | 21.04 | 26.30 | 31.56 | 36.82 | 42.09 | 51.56 |
| 0.12 | 2.65 | 4.42 | 6.19 | 8.84 | 10.61 | 13.26 | 17.68 | 22.10 | 26.52 | 30.94 | 35.37 | 43.33 |
| 0.13 | 2.26 | 3.76 | 5.27 | 7.53 | 9.04 | 11.30 | 15.07 | 18.83 | 22.60 | 26.36 | 30.14 | 36.92 |
| 0.14 | 1.95 | 3.24 | 4.55 | 6.49 | 7.80 | 9.74 | 12.99 | 16.24 | 19.48 | 22.73 | 25.98 | 31.83 |
| 0.15 | 1.70 | 2.82 | 3.96 | 5.65 | 6.79 | 8.48 | 11.31 | 14.14 | 16.97 | 19.80 | 22.64 | 27.73 |
| 0.16 | 1.49 | 2.48 | 3.48 | 4.97 | 5.97 | 7.46 | 9.95 | 12.43 | 14.92 | 17.40 | 19.89 | 24.37 |
| 0.17 | 1.32 | 2.20 | 3.08 | 4.40 | 5.29 | 6.60 | 8.81 | 11.01 | 13.21 | 15.41 | 17.62 | 21.59 |
| 0.18 | 1.18 | 1.96 | 2.75 | 3.92 | 4.72 | 5.89 | 7.86 | 9.82 | 11.78 | 13.75 | 15.72 | 19.26 |
| 0.19 | 1.06 | 1.76 | 2.47 | 3.52 | 4.23 | 5.29 | 7.05 | 8.81 | 10.58 | 12.34 | 14.11 | 17.28 |
| 0.20 | 0.95 | 1.59 | 2.23 | 3.18 | 3.82 | 4.77 | 6.36 | 7.95 | 9.54 | 11.14 | 12.73 | 15.60 |
| 0.21 | 0.87 | 1.44 | 2.02 | 2.88 | 3.46 | 4.33 | 5.77 | 7.21 | 8.66 | 10.10 | 11.55 | 14.15 |
| 0.22 | 0.79 | 1.31 | 1.84 | 2.63 | 3.16 | 3.94 | 5.26 | 6.57 | 7.89 | 9.20 | 10.52 | 12.89 |
| 0.23 | 0.72 | 1.20 | 1.68 | 2.40 | 2.89 | 3.61 | 4.81 | 6.01 | 7.22 | 8.42 | 9.63 | 11.79 |
| 0.24 | 0.66 | 1.10 | 1.55 | 2.21 | 2.65 | 3.31 | 4.42 | 5.52 | 6.63 | 7.73 | 8.84 | 10.83 |
| 0.25 | 0.61 | 1.01 | 1.43 | 2.03 | 2.44 | 3.05 | 4.07 | 5.09 | 6.11 | 7.13 | 8.15 | 9.98 |
| 0.26 | 0.57 | 0.94 | 1.32 | 1.88 | 2.26 | 2.82 | 3.77 | 4.70 | 5.65 | 6.59 | 7.53 | 9.23 |
| 0.27 | 0.52 | 0.87 | 1.22 | 1.74 | 2.10 | 2.61 | 3.49 | 4.36 | 5.23 | 6.11 | 6.99 | 8.56 |
| 0.28 | 0.49 | 0.81 | 1.14 | 1.62 | 1.95 | 2.43 | 3.25 | 4.06 | 4.87 | 5.68 | 6.50 | 7.96 |
| 0.29 | 0.45 | 0.75 | 1.06 | 1.51 | 1.82 | 2.27 | 3.03 | 3.78 | 4.54 | 5.29 | 6.06 | 7.42 |
| 0.30 | 0.42 | 0.70 | 0.99 | 1.41 | 1.70 | 2.12 | 2.83 | 3.53 | 4.24 | 4.95 | 5.66 | 6.93 |
| 0.31 | 0.40 | 0.66 | 0.93 | 1.32 | 1.59 | 1.98 | 2.65 | 3.31 | 3.97 | 4.63 | 5.30 | 6.49 |
| 0.32 | 0.37 | 0.62 | 0.87 | 1.24 | 1.49 | 1.86 | 2.49 | 3.11 | 3.73 | 4.35 | 4.97 | 6.09 |
| 0.33 | 0.35 | 0.58 | 0.82 | 1.17 | 1.40 | 1.75 | 2.34 | 2.92 | 3.51 | 4.09 | 4.68 | 5.73 |
| 0.34 | 0.33 | 0.55 | 0.77 | 1.10 | 1.32 | 1.65 | 2.20 | 2.75 | 3.30 | 3.85 | 4.41 | 5.40 |
| 0.35 | 0.31 | 0.51 | 0.73 | 1.03 | 1.25 | 1.55 | 2.08 | 2.60 | 3.11 | 3.63 | 4.16 | 5.09 |
| 0.36 | 0.29 | 0.49 | 0.69 | 0.98 | 1.18 | 1.47 | 1.96 | 2.46 | 2.94 | 3.43 | 3.93 | 4.81 |
| 0.37 | 0.28 | 0.46 | 0.65 | 0.93 | 1.12 | 1.39 | 1.86 | 2.33 | 2.79 | 3.25 | 3.72 | 4.56 |
| 0.38 | 0.26 | 0.44 | 0.62 | 0.88 | 1.06 | 1.32 | 1.76 | 2.20 | 2.64 | 3.08 | 3.53 | 4.32 |
| 0.40 | 0.24 | 0.39 | 0.56 | 0.79 | 0.95 | 1.19 | 1.59 | 1.99 | 2.38 | 2.78 | 3.18 | 3.90 |
| 0.41 | 0.23 | 0.37 | 0.53 | 0.76 | 0.91 | 1.13 | 1.51 | 1.89 | 2.27 | 2.65 | 3.03 | 3.71 |
| 0.42 | 0.22 | 0.36 | 0.51 | 0.72 | 0.87 | 1.08 | 1.44 | 1.80 | 2.16 | 2.52 | 2.89 | 3.54 |
| 0.43 | 0.21 | 0.34 | 0.48 | 0.69 | 0.83 | 1.03 | 1.38 | 1.72 | 2.06 | 2.41 | 2.75 | 3.37 |
| 0.44 | 0.20 | 0.32 | 0.46 | 0.66 | 0.79 | 0.98 | 1.31 | 1.64 | 1.97 | 2.30 | 2.63 | 3.22 |
| 0.45 | 0.19 | 0.31 | 0.44 | 0.63 | 0.75 | 0.94 | 1.26 | 1.57 | 1.88 | 2.20 | 2.52 | 3.08 |
| 0.46 | 0.18 | 0.30 | 0.42 | 0.60 | 0.72 | 0.90 | 1.20 | 1.50 | 1.80 | 2.10 | 2.41 | 2.95 |
| 0.47 | 0.17 | 0.28 | 0.40 | 0.58 | 0.69 | 0.86 | 1.15 | 1.44 | 1.72 | 2.01 | 2.31 | 2.82 |
| 0.48 | 0.17 | 0.27 | 0.39 | 0.55 | 0.66 | 0.82 | 1.10 | 1.38 | 1.65 | 1.93 | 2.21 | 2.71 |
| 0.49 | 0.16 | 0.26 | 0.37 | 0.53 | 0.64 | 0.79 | 1.06 | 1.33 | 1.59 | 1.85 | 2.12 | 2.60 |
| 0.50 | 0.15 | 0.25 | 0.36 | 0.51 | 0.61 | 0.76 | 1.01 | 1.27 | 1.52 | 1.78 | 2.04 | 2.50 |
| 0.51 | 0.15 | 0.24 | 0.34 | 0.49 | 0.59 | 0.73 | 0.98 | 1.22 | 1.46 | 1.71 | 1.96 | 2.40 |
| 0.52 | 0.14 | 0.23 | 0.33 | 0.47 | 0.57 | 0.70 | 0.94 | 1.18 | 1.41 | 1.65 | 1.88 | 2.31 |
| 0.53 | 0.14 | 0.22 | 0.32 | 0.45 | 0.54 | 0.67 | 0.91 | 1.13 | 1.35 | 1.59 | 1.81 | 2.22 |
| 0.54 | 0.13 | 0.22 | 0.31 | 0.44 | 0.52 | 0.65 | 0.87 | 1.09 | 1.30 | 1.53 | 1.75 | 2.14 |
| 0.55 | 0.13 | 0.21 | 0.29 | 0.42 | 0.51 | 0.63 | 0.84 | 1.05 | 1.26 | 1.47 | 1.68 | 2.06 |
| 0.56 | 0.12 | 0.20 | 0.28 | 0.41 | 0.49 | 0.60 | 0.81 | 1.02 | 1.21 | 1.42 | 1.62 | 1.99 |
| 0.57 | 0.12 | 0.19 | 0.27 | 0.39 | 0.47 | 0.58 | 0.78 | 0.98 | 1.17 | 1.37 | 1.57 | 1.92 |
| 0.58 | 0.11 | 0.19 | 0.27 | 0.38 | 0.45 | 0.56 | 0.76 | 0.95 | 1.13 | 1.32 | 1.51 | 1.85 |
| 0.59 | 0.11 | 0.18 | 0.26 | 0.37 | 0.44 | 0.54 | 0.73 | 0.91 | 1.09 | 1.28 | 1.46 | 1.79 |
| 0.60 | 0.11 | 0.18 | 0.25 | 0.35 | 0.42 | 0.53 | 0.71 | 0.88 | 1.06 | 1.24 | 1.41 | 1.73 |
- Tolerance of ohm/m: ±5%
- Round wire: range from 0.04mm (0.0016″) to 12mm (0.4724″)
- Ribbon: range from 0.05mm (0.002″) to 6mm (0.2362″), Max ratio width : thickness = 10:1
Key Features of CuNi34 NC040 Wire:
- Composition:
Copper (Cu): Approximately 66%.
Nickel (Ni): Approximately 34%, enhancing its resistance to corrosion and mechanical strength.
- Corrosion Resistance:
Exceptional Marine Performance: Highly resistant to seawater corrosion, including biofouling, making it an ideal choice for marine and offshore applications.
Chemical Resistance: Performs well against mild acids, alkalis, and various industrial chemicals, offering durability in aggressive environments.
Resistance to Stress Corrosion Cracking: Effective in environments where chlorides and sulfides are present.
- Mechanical Properties:
High Strength: CuNi34 provides excellent tensile and yield strength, enabling it to withstand mechanical stresses.
Good Toughness: Retains its structural integrity under both high and low temperatures.
Work Hardening Capability: Can be strengthened through cold working for enhanced performance.
- Thermal and Electrical Properties:
Thermal Conductivity: Efficient heat transfer makes it suitable for use in heat exchangers and cooling systems.
Electrical Conductivity: Moderate electrical conductivity, sufficient for applications requiring both electrical performance and corrosion resistance.
- Non-Magnetic Nature:
CuNi34 is fully non-magnetic, making it suitable for environments where magnetic interference must be minimized.
- Weldability and Fabrication:
Ease of Welding: Can be welded using standard welding techniques without losing its corrosion resistance.
Formability: Easily fabricated into wires, tubes, and other forms, making it versatile for various industrial applications.
- High-Temperature Resistance:
Performs reliably in high-temperature environments, maintaining strength and stability up to approximately 300°C (572°F).
Applications:
- Marine and Offshore: Ideal for seawater piping, heat exchangers, and shipbuilding components due to its exceptional resistance to seawater corrosion.
- Chemical Processing: Used in heat exchangers, evaporators, and piping systems exposed to aggressive chemicals.
- Desalination Plants: Suitable for saltwater distillation equipment, including condensers and evaporators.
- Power Generation: Used in cooling systems, heat exchangers, and other components in thermal and nuclear power plants.
- Automotive Industry: Applied in systems requiring high durability and resistance to corrosion, such as braking systems and hydraulic lines.
- Electrical and Electronics: Used in resistance wires, connectors, and terminals where durability and corrosion resistance are critical.
Advantages of CuNi34/NC040 Wire:
- Outstanding Corrosion Resistance: Particularly in seawater and chemically aggressive environments.
- High Strength and Durability: Provides robust mechanical performance under stress.
- Thermal Stability: Efficient performance in both high- and low-temperature applications.
- Non-Magnetic: Ideal for sensitive applications requiring non-magnetic materials.
- Versatile Fabrication: Easy to weld and form, enabling diverse industrial applications.
- Long Service Life: Excellent durability reduces maintenance and replacement costs.
Limitations of CuNi34/NC040 Wire:
- Cost: The high nickel content increases the cost compared to other copper-based alloys.
- Lower Electrical Conductivity: While sufficient for many uses, it is lower than pure copper, limiting its use in some high-conductivity applications.
- Extreme High-Temperature Use: Not ideal for applications exceeding 300°C, where specialized materials may be required.
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