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CUNI2 Copper-Nickel Weldable Resistance Alloy Wholesale
Home / Products / Copper-Nickel / CUNI2 Copper-Nickel Weldable Resistance Alloy
  • CUNI2 Copper-Nickel Weldable Resistance Alloy
  • CUNI2 Copper-Nickel Weldable Resistance Alloy
  • CUNI2 Copper-Nickel Weldable Resistance Alloy
  • CUNI2 Copper-Nickel Weldable Resistance Alloy
  • CUNI2 Copper-Nickel Weldable Resistance Alloy

CUNI2 Copper-Nickel Weldable Resistance Alloy

CUNI2 copper-nickel weldable resistance alloy represents a critical turning point in the transition from pure copper to high-resistance alloys.  By introducing approximately 2% nickel atoms into the copper matrix, it achieves a precise jump in resistivity through lattice distortion effects while maintaining excellent metallic continuity. In metal physics, resistance originates from the scattering of electron flow as it passes through the crystal lattice. CuNi2, by precisely controlling the 2% nickel content, artificially creates uniformly distributed scattering centers while maintaining efficient electron transport. The temperature coefficient of resistance of CuNi2 is at a moderate level. This means that its resistance value increases slightly with increasing temperature. This characteristic is extremely valuable in certain "self-compensating" circuits, where the slight increase in resistance can provide a degree of current-limiting protection when the circuit overheats.

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  • Specification
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Grade CuNi1 CuNi2 CuNi6 CuNi8 CuMn3 CuNi10 CuNi14 CuNi19 CuNi23 CuNi30 CuNi34 CuNi44
NC003 NC005 NC010 NC012 MC012 NC015 NC020 NC025 NC030 NC035 NC040 NC050
Composition (%) Cu Bal Bal Bal Bal Bal Bal Bal Bal Bal Bal Bal Bal
Mn — — — — 3 — 0.3 0 0.5 1 1 1
Ni 1 2 6 8 10 14.2 19 23 30 34 44
Max operating temperature (℃) 200 200 220 250 200 250 300 300 300 350 350 400
Resistivity (μΩ·m @20℃) 0.03±10% 0.06±10% 0.1±10% 0.12±10% 0.12±10% 0.15±10% 0.2±5% 0.25±5% 0.35±5% 0.35±5% 0.4±5% 0.49±5%
Temperature coefficient of resistance (×10⁻⁶/℃) <100 <120 <60 ≈57 <38 <50 <38 <25 <16 <10 0 < -8
Thermoelectric voltage vs Copper (μV/K @20℃) -8 -12 -18 -22 1 -25 -28 -32 -34 -37 -39 -43
Mean thermal expansion coefficient (×10⁻⁶/℃) 17.5 17.5 17.5 17.5 18 17.5 17.5 17.5 17.5 17 16 15
Thermal conductivity (W/mK) 145 130 92 75 84 59 48 38 33 27 25 23
Specific heat capacity at 20℃ (J/gK) 0.38 0.38 0.38 0.38 0.39 0.38 0.38 0.38 0.38 0.39 0.4 0.41
Density (g/cm³) 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 (℃) 1085 1090 1095 1097 1050 1100 1115 1135 1150 1170 1180 1280
Min tensile strength (N/mm²) 210 220 250 270 290 290 310 340 350 400 400 420
Elongation (%) 25 25 25 25 25 25 25 25 25 25 25 25
About Us
Danyang Haiwei Electrothermal Alloy Co., Ltd.
Danyang Haiwei Electrothermal Alloy Co., Ltd. is located in Lvcheng Town, Danyang City, Jiangsu Province, China. The company was established in 2010 based on the original company "Danyang Huakang Electric Heating Alloy Co., Ltd." and has been in operation for over 40 years. Since its expansion, the company's total area has reached 30,000 square meters. As a famous China CUNI2 Copper-Nickel Weldable Resistance Alloy Manufacturers and CUNI2 Copper-Nickel Weldable Resistance Alloy Factory, the company has production lines for a series of products including FeCrAl, Kanthal, CuNi, NiCr, CuMn, Kangtong, Monel, Incoloy, Hastelloy, etc. We have equipped with advanced equipment and processes, capable of providing a complete product range from raw material melting, steel rolling, stretching, heat treatment to finished products and packaging. Standardization work and strict inspections run through every stage of the product. As Haiven people, we have always adhered to the goal of "building a first-class brand and a first-class enterprise". We uphold the spirit of "quality first, reputation foremost", providing customers with the highest quality products and competitive prices. Welcome new and old customers at home and abroad to visit and patronize. Let us achieve long-term win-win cooperation.

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