CuNi1-CuNi44 Copper Nickel Resistance Heating Alloy Wire, Electric Heating Wire for Resistors

CuNi1-CuNi44 Copper Nickel Resistance Heating Alloy Wire, Electric Heating Wire for Resistors

1. Product Description

The CuNi1-CuNi44 series Copper Nickel Resistance Heating Alloy Wire is a high-performance electric resistance alloy manufactured under strict quality control. This wire family covers a full range of nickel content from 1% to 44%, offering precisely adjustable resistivity values to meet diverse electrical and thermal applications. Produced from high-purity raw materials, our CuNi alloy wire exhibits excellent stability, oxidation resistance, and consistent performance over extended service life. Available in round wire, ribbon, and strip forms, with diameters ranging from 0.05mm to 8.0mm, this product is the preferred choice for precision resistor elements, heating cables, and thermal control devices worldwide.

2. Key Technical Parameters

3. Applications

This alloy wire is widely utilized across multiple industries:

• Low-voltage circuit breakers and thermal overload relays

• Electric blankets, heating pads, and floor heating cables

• Wire-wound precision resistors and potentiometers

• Industrial electric furnaces and drying equipment

• Automotive seat heaters and defrosting elements

• Temperature measurement and compensation circuits

4. Product Advantages

• Stable Resistivity Performance: Each grade maintains consistent resistance values with minimal fluctuation under varying temperatures, ensuring reliable and repeatable operation.

• Excellent Corrosion and Oxidation Resistance: The copper-nickel matrix provides outstanding protection against moisture, chemical agents, and high-temperature oxidation, significantly extending service life.

• Non-Magnetic Characteristics: All grades exhibit negligible magnetic permeability, making them ideal for applications sensitive to magnetic interference, such as precision measuring instruments.

• Superior Workability: The alloy is readily drawable, bendable, and weldable, facilitating easy fabrication into complex shapes and coils without cracking or stress fracture.

• Wide Selection Flexibility: With 11 available grades, customers can precisely match resistivity and thermal requirements for any specific project.

5. Product Functions

• Electric Energy Conversion: Efficiently converts electrical current into precise, controllable heat output.

• Current Limiting and Protection: Serves as a current-sensing element in overload relays and circuit protectors.

• Temperature Regulation: Maintains stable heating performance in thermostats and temperature control systems.

• Signal Conditioning: Acts as a compensation lead wire in thermocouple circuits for accurate temperature measurement.

6. Operating Instructions

1. Determine the required resistance value and select the appropriate CuNi grade and diameter according to the resistivity table.

2. Cut the wire to the calculated length, allowing slight excess for connection terminals.

3. For applications requiring insulation, apply appropriate enamel coating or wrap with insulating sleeving.

4. Connect the wire ends using soldering, brazing, or mechanical clamping — ensure secure and low-resistance contacts to avoid localized overheating.

5. Install the wire in the designated equipment, ensuring adequate spacing between turns to prevent short circuits.

6. Perform a preliminary test at 50% rated power to verify uniform heating and electrical connections before full operation.

7. Precautions

• Do not exceed the maximum continuous operating temperature for the selected grade (refer to the temperature table above), as this will accelerate oxidation and reduce service life.

• Avoid mechanical over-stretching or sharp bending during installation, which may alter resistance characteristics and cause premature failure.

• Ensure all connection terminals are clean and tightly fastened — loose connections generate hot spots and may lead to open-circuit failures.

• When operating in humid or corrosive environments, apply protective coatings or use the wire with appropriate insulation.

• Store in a dry, well-ventilated area away from acid/alkali fumes and direct sunlight.

​8. Shipping & Delivery

• Lead Time: 15–30 working days after order confirmation.

• Supply Capacity: 10 tons per month.

• Shipping Methods: By sea, air, or international courier (DHL/FedEx/UPS) — customers may specify their preferred forwarder.

• All orders are dispatched with full commercial invoices, packing lists, and material test certificates.

• Shipping schedules and tracking information will be provided within 48 hours after dispatch.

9. Payment Terms

All payments must be settled in US Dollars (USD) or mutually agreed currencies.

10. Packaging

• Standard Packaging: Coil-wound on plastic spools or fiber drums, protected with anti-rust paper and sealed in moisture-proof bags.

• Outer Packaging: Reinforced export cartons or wooden crates with adequate cushioning to prevent transit damage.

• Labeling: Each package is clearly marked with grade designation, diameter, net weight, heat number, and manufacturing date.

• Custom packaging requirements are welcome and can be arranged at nominal additional cost.

11. After-Sales Policy (Returns, Exchanges & Warranty)

• Quality Guarantee: All products are factory-tested and certified to meet ASTM/DIN standards. A Material Test Certificate (MTC) is provided with every shipment.

• Inspection Period: Customers are kindly requested to inspect the goods within 7 days of receipt. If any quantity discrepancy or visible defect is found, please notify us immediately with photographic evidence.

• Return/Exchange: Returns or exchanges are accepted for non-conforming goods only — products must be unused and in original packaging. Return shipping costs are borne by the buyer unless the issue is attributable to our production or packaging error.

• Warranty Scope: This product is warranted for 12 months from shipment date against material and manufacturing defects. This warranty does not cover damage resulting from improper installation, over-temperature operation, mechanical abuse, or unauthorized modifications.

• Technical Support: Our engineering team is available free of charge to assist with grade selection, installation queries, and troubleshooting. Response guaranteed within 24 business hours.

• Dispute Resolution: Any disputes shall be resolved through friendly negotiation. If no agreement is reached, the matter shall be submitted to the China International Economic and Trade Arbitration Commission (CIETAC) in accordance with its rules.