Low Temperature Coefficient 0.12mm CuNi44 Constantan Wire For Precision Resistors
Features:
- Extremely Low Temperature Coefficient of Resistance
- Wide Operating Temperature Range
- Excellent Solderability & Weldability
- Stable Medium Resistivity
Description:
Cuni alloy wire, with nickel content adjustable across a wide spectrum, maintains nearly constant resistivity over extended temperature ranges. Its corrosion resistance is uniformly effective in both neutral and mildly acidic media. The material exhibits a favorable strength‑ductility synergy. It is processed to achieve a smooth, pit‑free surface. Diametrical deviations are minimized, and internal microporosity is absent, ensuring reliable intrinsic characteristics.
Specifications:
| Material |
Resistivity (200°C, μΩ·m) |
Max. working temp. (°C) |
Tensile strength (MPa) |
Melting point (°C) |
Density (g/cm³) |
| NC003 (CuNi1) |
0.03 |
200 |
210 |
1085 |
8.9 |
| NC005 (CuNi2) |
0.05 |
200 |
220 |
1090 |
8.9 |
| NC010 (CuNi6) |
0.1 |
220 |
250 |
1095 |
8.9 |
| NC012 (CuNi8) |
0.12 |
250 |
270 |
1097 |
8.9 |
| NC015 (CuNi10) |
0.15 |
250 |
290 |
1100 |
8.9 |
| NC020 (CuNi14) |
0.2 |
300 |
310 |
1115 |
8.9 |
| NC025 (CuNi19) |
0.25 |
300 |
340 |
1135 |
8.9 |
| NC030 (CuNi23) |
0.3 |
300 |
250 |
1150 |
8.9 |
| NC035 (CuNi30) |
0.35 |
350 |
400 |
1170 |
8.9 |
| NC040 (CuNi34) |
0.4 |
350 |
400 |
1180 |
8.9 |
| NC050 (CuNi44) |
0.5 |
400 |
420 |
1200 |
8.9 |
Applications
- Precision Resistors: Wire‑wound precision resistors, shunts, potentiometers, and current sensing elements requiring stable resistance over temperature.
- Thermocouples: Type T (Copper‑Constantan, –200°C to +350°C), Type J (Iron‑Constantan), and Type E (Chromel‑Constantan) for industrial temperature measurement.
- Strain Gauges: Constantan is the standard grid material for bonded resistance strain gauges due to its high strain sensitivity and low temperature sensitivity.
- Motor & Industrial Controls: Industrial starting resistors, speed controllers, load banks, and braking resistors for elevators and cranes.
- Heating Elements: Low‑to‑medium temperature industrial furnaces, floor heating cables, and heating tapes (max 400°C).
- Research & Laboratory: Standard resistors, low‑temperature sensors, cryogenic thermometry, and calibration equipment.
- Aerospace & Automotive: Engine exhaust temperature sensors (thermocouples), pressure sensors, and strain sensors in corrosive environments.
FAQ
Q1: Can I get a sample of CuNi Costantan micro wire before bulk order?
A: Yes, free samples are available upon request. You only pay shipping.
Q2: What is the lead time for this CuNi Costantan wire?
A: Samples ready in 2–3 days. Mass production takes 7–20 working days depending on your quantity.
Q3: Is there a minimum order quantity (MOQ)?
A: MOQ is 5 kgs.
Q4: How do you prevent the wire from tangling or breaking during shipping?
A: We wind it carefully on anti-static plastic spools with plastic box protection. Each spool is inspected under magnification before packing.
Q5: Do you offer guarantee for CuNi Costantan products?
A: Yes, we offer a 12-month warranty against manufacturing defects. We also provide a Certificate of Analysis (CoA) and Mill Test Report (MTR) for each batch.
