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CuNi44 Constantan Solid Round Wire, 0.80mm Diameter High Stability Copper-Nickel Alloy Wire for Precision Resistance & Thermocouple Applications
CuNi44 Constantan Solid Round Wire, 0.80mm Diameter High Stability Copper-Nickel Alloy Wire for Precision Resistance & Thermocouple Applications
Specifications
MOQ :
5KG
Delivery Time :
5-21 days
Operating Temperature :
-60°C ~ 400°C (Dry Industrial Atmosphere)
Certification :
ISO 9001
Custom Diameter Range :
0.05mm ~ 3.0mm
Brand Name :
Huona
Alloy Grade :
CuNi44 Constantan (56Cu / 44Ni)
Place of Origin :
Shanghai
Surface Treatment :
Stress-Relief Bright Annealed, Mirror Polished, Burr-Free
Payment Terms :
L/C,T/T,Western Union
Temperature Coefficient of Resistance :
Near-zero low drift within -60°C ~ 400°C
Model Number :
CuNi44
Standard Diameter :
0.80mm
Price :
Negotiable
Nominal Resistivity :
0.48 µΩ·m (20°C Reference)
Packaging Details :
Carton/Wooden Case
Supply Ability :
500 tons per month
Processing Performance :
High ductility, tight winding capable, no fracture after repeated bending
Description

Product Overview

This premium CuNi44 constantan round wire is manufactured by Huona with strictly controlled copper-nickel 56/44 alloy ratio, designed for precision electrical resistance components and thermocouple negative conductor manufacturing. Produced via multi-pass fine drawing and uniform stress-relief bright annealing processes, this solid round wire delivers ultra-consistent resistivity, low temperature coefficient of resistance, smooth burr-free metallic surface and outstanding ductility. Tightly wound on heavy-duty large black industrial plastic spools as shown in the picture, it supports long-length continuous unwinding, perfectly suited for resistor winding, strain gauge fabrication, and pairing with iron or nickel-chromium alloys to form standard temperature sensing thermocouple assemblies.

Core Specifications

Product Name: CuNi44 High Stability Constantan Solid Round Wire

Conductor Material: CuNi44 (56% Copper + 44% Nickel Constantan Alloy)

Processing Technology: Multi-pass precision wire drawing + full stress-relief bright annealing + surface finishing

Standard Specification: 0.80mm Nominal Diameter

Customizable Size Range: Diameter 0.05mm – 3.0mm

Surface Condition: Bright polished silver metallic surface, uniform roundness, free of burrs, scratches and oxidation spots

Electrical Performance: Stable volume resistivity, ultra-low temperature resistance drift across wide temperature bands

Operating Temperature Range: -60°C ~ 400°C (continuous stable operation under dry atmospheric environments)

Standards Compliance: IEC 60584, GB/T 6149, RoHS 2.0, REACH environmental compliance standards

Key Differentiating Advantages

1. Precise 56Cu-44Ni Alloy Composition for Ultra-Stable Resistivity

This CuNi44 wire adopts accurately proportioned copper and nickel raw materials with strict impurity limitation during smelting. The balanced alloy microstructure achieves an extremely low temperature coefficient of resistance, maintaining nearly consistent electrical resistance value as ambient temperature fluctuates. Batch-to-batch alloy consistency eliminates resistance deviation during mass winding of precision resistors and sensing components.

2. Excellent Thermoelectric Matching Performance for Thermocouple Pairs

CuNi44 constantan serves as the standard negative leg for Type J and Type T thermocouple systems. It features predictable, linear thermoelectric voltage output when paired with iron or copper positive conductors, delivering reliable repeatable temperature signal transmission for industrial temperature probes and thermal measurement equipment.

3. Superior Ductility & Uniform Roundness for Precision Winding

Stress-relief annealing removes internal drawing residual stress, granting the wire outstanding softness and bending resistance. It withstands tight small-radius winding, fine coiling and micro-cutting without springback, fracture or diameter deformation. Consistent circular cross-section ensures even winding tension and uniform resistance distribution across finished resistor coils.

4. Large Spool Long-Length Packaging Boosts Production Efficiency

The wire is wound onto heavy-duty large-capacity black plastic spools with huge continuous length per reel, minimizing splicing breaks during automated winding production lines. The smooth polished surface prevents abrasion during high-speed unwinding, while marked spool hubs allow clear specification identification for warehouse management and batch tracking.

5. Reliable Anti-Corrosion & Long-Term Electrical Stability

CuNi44 alloy exhibits decent resistance against dry air oxidation and mild atmospheric erosion. It maintains stable mechanical and electrical properties under long-duration cyclic temperature changes, resisting performance aging to extend the service life of resistive elements and temperature sensing wires in general industrial environments.

Technical Specifications Table

Attribute Typical Specification
Alloy Grade CuNi44 Constantan (56Cu / 44Ni)
Standard Diameter 0.80mm
Custom Diameter Range 0.05mm ~ 3.0mm
Surface Treatment Stress-Relief Bright Annealed, Mirror Polished, Burr-Free
Operating Temperature -60°C ~ 400°C (Dry Industrial Atmosphere)
Nominal Resistivity 0.48 µΩ·m (20°C Reference)
Temperature Coefficient of Resistance Near-zero low drift within -60°C ~ 400°C
Processing Performance High ductility, tight winding capable, no fracture after repeated bending

Supply & Packaging Standard

Supply Form: Continuous solid round CuNi44 wire densely wound on large heavy-duty black industrial plastic spools; standard full-length large reels and custom cut-to-length small coils available

Packaging: Each large spool wrapped with dust-proof moisture-proof outer packaging plus shockproof protective padding, optimized for bulk factory procurement and long-distance export transportation

MOQ: 1 large black spool for sample trial winding; massive bulk supply for resistor manufacturers, thermocouple sensor factories and electronic component producers

Customization: Custom wire diameter, single spool winding length, annealing hardness and surface finish according to precision resistor and thermocouple production requirements

Typical Application Scope

Precision Resistor Winding: Core raw material for manufacturing low-drift precision wound resistors, shunt resistors and load resistance coils.

Thermocouple Negative Conductor Production: Negative alloy leg for Type J and Type T industrial temperature sensing wires and contact probes.

Strain Gauge & Testing Instrument Components: Stable resistive wire for laboratory measuring equipment, strain detection modules and electrical calibration fixtures.

Electronic Heating Control Elements: Low-drift resistance coils for small precision temperature adjustment modules and electronic thermal regulators.

General Electrical Resistance Components: Long-life resistive wire for household appliance control circuits, automation equipment signal balancing parts.
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CuNi44 Constantan Solid Round Wire, 0.80mm Diameter High Stability Copper-Nickel Alloy Wire for Precision Resistance & Thermocouple Applications

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Product Detail
MOQ :
5KG
Delivery Time :
5-21 days
Operating Temperature :
-60°C ~ 400°C (Dry Industrial Atmosphere)
Certification :
ISO 9001
Custom Diameter Range :
0.05mm ~ 3.0mm
Brand Name :
Huona
Contact Supplier
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CuNi44 Constantan Solid Round Wire, 0.80mm Diameter High Stability Copper-Nickel Alloy Wire for Precision Resistance & Thermocouple Applications

Huona (Shanghai) New Material Co., Ltd.

Verified Supplier
2 Years
shanghai, shanghai
Since 2008
Business Type :
Manufacturer, Exporter
Main Products :
Low Expansion Alloy, Soft Magnetic Alloy, Elastic Alloy
Total Annual :
8000000-100000000
Employee Number :
100~120
Certification Level :
Verified Supplier
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