CuNi Resistance Alloy Wires
Low-resistance alloys for precision electrical and electronic applications
Copper-nickel (CuNi) alloy wires are essential materials for applications requiring stable, low-resistance electrical properties. Our range covers 11 grades from CuNi1 through CuNi44, each engineered for specific resistivity and temperature coefficient characteristics. These alloys offer excellent corrosion resistance, good forming and welding properties, and highly stable resistance values over a wide temperature range. All wires are cold-drawn to precise diameters from 0.03mm to 10mm, ensuring consistent performance for resistor manufacturing, strain gauges, thermocouples, and electronic components.
CuNi Alloy Grades — Specification Overview
Key properties of our copper-nickel resistance alloy grades
Alloy Name Properties |
NC003
CuNi1 |
NC005
CuNi2 |
NC010
CuNi6 |
NC012
CuNi8 |
NC015
CuNi10 |
NC020
CuNi14 |
NC025
CuNi19 |
NC030
CuNi23 |
NC035
CuNi30 |
NC040
CuNi34 |
NC050
CuNi44 |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Main
Components (%) |
Ni | 1 | 2 | 6 | 8 | 10 | 14 | 19 | 23 | 30 | 34 | 44 |
| Mn | - | - | - | - | - | - | 0.5 | 0.5 | 1 | 0.5 | 1 | |
| Cu | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | |
| Maximum operating Temp.(℃) | 200 | 200 | 220 | 250 | 250 | 300 | 300 | 300 | 350 | 350 | 400 | |
|
Melting point
(approx ℃) |
1085 | 1090 | 1095 | 1097 | 1100 | 1115 | 1135 | 1150 | 1170 | 1180 | 1280 | |
|
Density
(g/cm 3 ) |
8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | |
|
Resistivity
20℃(μΩ.m) |
0.03±10% | 0.05±10% | 0.1±10% | 0.12±10% | 0.15±10% | 0.2±5% | 0.25±5% | 0.3±5% | 0.35±5% | 0.4±5% | 0.50±5% | |
|
Tensile strength
(Mpa) |
≥210 | ≥220 | ≥250 | ≥270 | ≥290 | ≥310 | ≥340 | ≥350 | ≥400 | ≥400 | ≥420 | |
|
Emf vs Cu
μv/℃(0～100℃) |
-8 | -12 | -18 | -22 | -25 | -28 | -32 | -34 | -37 | -39 | -43 | |
|
TCR 10-6/℃
（20-600℃） |
<100 | <120 | <60 | <38 | <50 | <30 | <25 | <16 | <10 | 0 | <-6 | |
| Elongation (%，≥) | Dia.≤1.0mm | 18 | 18 | 18 | 18 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Dia.>1.0mm | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | |
* Data per GB/T1234-2012. Contact us for detailed datasheets and custom requirements.