Heating Resistance CuNi Wire CuNi44 CuNi23 CuNi30 CuNi25 Wire For Resistors

• Extremely Low Temperature Coefficient of Resistance
• Wide Operating Temperature Range
• Excellent Solderability & Weldability
• Stable Medium Resistivity 

The CuNi wire family, offering a range of nickel proportions, is characterized by stable ohmic behavior and negligible hysteresis under thermal cycling. It resists both uniform and galvanic corrosion effectively. Mechanical properties include high yield strength and appreciable plastic strain. Surface quality is enhanced by a pickled and passivated finish. Precise gauge control and uniform grain size contribute to predictable physical responses.

• 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.

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.