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CuNi44 Constantan Fine Round Wire, 0.40mm Diameter CW50600 Low-Temp-Coefficient Copper Nickel Alloy Wire for Precision Sensing & Mini Resistor Fabrication
| Place of Origin | Shanghai |
|---|---|
| Brand Name | Huona |
| Certification | ISO 9001 |
| Model Number | CW50600 |
| Minimum Order Quantity | 5KG |
| Price | Negotiable |
| Packaging Details | Carton/Wooden Case |
| Delivery Time | 5-21 days |
| Payment Terms | L/C,T/T,Western Union |
| Supply Ability | 500 tons per month |
Product Details
| Alloy Designation | CW50600 Constantan (56Cu / 44Ni) | Standard Diameter | 0.40mm |
|---|---|---|---|
| Custom Diameter Range | 0.03mm ~ 2.5mm Fine & Medium Gauges | Surface Treatment | Low-Stress Full Soft Annealed, Mirror Polished, Burr-Free Round Surface |
| Operating Temperature | -70°C ~ 380°C (Dry Indoor & Light Industrial Atmosphere) | Reference Resistivity | 0.48 µΩ·m At 20°C Ambient Temperature |
| Temperature Coefficient Of Resistance | Extremely Low Drift Value Within Full Working Temperature Band | Processing Performance | Ultra-high Ductility, Supports Micro Tight Winding, No Fracture After Repeated Tiny-radius Bending |
Product Description
Product Overview
This fine-gauge CuNi44 constantan round wire under Huona production complies with CW50600 international alloy designation, featuring precisely controlled 56Cu–44Ni metal ratio tailored for miniature precision electrical components and thermocouple negative core materials. Manufactured via multi-stage micro drawing and low-stress full soft annealing craft, this ultra-fine solid wire boasts ultra-uniform circular cross-section, mirror smooth oxide-free surface, ultra-low resistance temperature drift and outstanding micro bending ductility. Neatly layered and densely wound on standard medium-size black industrial plastic spools as shown in the picture, the compact winding structure reduces loose wire tangling during high-speed automated coiling processes. It serves as ideal base material for mini wound resistors, micro strain detection assemblies and paired temperature sensing thermocouple negative conductors for compact electronic equipment.
Core Specifications
Product Name: CuNi44 CW50600 Fine Gauge Constantan Solid Round Wire
Alloy Grade: Domestic CuNi44 / International Standard CW50600 Constantan Alloy (56% Copper + 44% Nickel)
Processing Technology: Multi-pass micro precision wire drawing + low-residual-stress full soft annealing + ultra-fine surface finishing
Standard Specification: 0.40mm Nominal Diameter
Customizable Size Range: Diameter 0.03mm – 2.5mm fine to medium gauges
Surface Condition: Bright silver mirror metallic finish, perfect circularity, zero surface burrs, scratches and discoloration
Electrical Performance: Stable inherent resistivity, ultra-minimal resistance fluctuation across wide temperature spectrum
Operating Temperature Range: -70°C ~ 380°C (long-term steady service under dry air industrial working environments)
Standards Compliance: IEC 60584, GB/T 6149, RoHS 2.0, REACH low-hazard material certification
Key Differentiating Advantages
1. Dual Standard Alloy Formula with Strict Ingredient Purification
This CuNi44 wire matches both domestic CuNi44 industrial standard and international CW50600 alloy specification, with high-purity smelting to limit trace impurity content. The balanced copper-nickel metallographic structure delivers near-zero temperature coefficient of resistance, maintaining consistent electrical resistance value when ambient temperature shifts up and down. Uniform alloy composition across every production batch eliminates resistance tolerance deviation during mass manufacturing of miniature resistive parts.
2. Optimized Thermoelectric Matching for Small Thermocouple Probes
As the standardized negative conductor for Type J and Type T thermocouple systems, CW50600 constantan generates highly linear thermoelectric voltage signals when matched with iron or copper positive alloy wires. The fine wire diameter supports production of slim, compact temperature sensing probes for narrow installation spaces, ensuring repeatable, low-deviation temperature reading output for miniature thermal monitoring modules.
3. Ultra-Fine Ductile Texture for Micro Precision Coiling & Forming
Low-stress full soft annealing thoroughly eliminates internal tensile stress generated during fine drawing, endowing the wire with exceptional softness and micro bending resilience. It tolerates ultra-tight small-radius winding, micro cutting and precise coiling without springback, splitting or diameter deformation. Uniform round cross-section guarantees even winding tension and evenly distributed resistance on mini resistor coils to stabilize electrical performance of finished components.
4. Medium Spool Dense Winding Design for Automated Processing
The fine CuNi44 wire is compactly layered on medium-capacity black plastic spools with orderly uniform winding to avoid wire tangling during high-speed automatic winding machine operation. Clear label positioning on spool flange facilitates quick specification identification for warehouse stock management and batch traceability, while smooth polished wire surface prevents surface abrasion during continuous unwinding.
5. Mild Atmospheric Anti-Oxidation & Long-Term Electrical Stability
CW50600 copper-nickel alloy possesses reliable resistance against dry air oxidation and mild atmospheric corrosion. It retains stable mechanical and electrical characteristics through repeated cyclic temperature changes, resisting performance aging and prolonging the service lifespan of mini resistive elements and slim thermocouple wires for general electronics and light industrial equipment.
Technical Specifications Table
| Attribute | Typical Specification |
|---|---|
| Alloy Designation | Domestic CuNi44 / International CW50600 Constantan (56Cu / 44Ni) |
| Standard Diameter | 0.40mm |
| Custom Diameter Range | 0.03mm ~ 2.5mm Fine & Medium Gauges |
| Surface Treatment | Low-Stress Full Soft Annealed, Mirror Polished, Burr-Free Round Surface |
| Operating Temperature | -70°C ~ 380°C (Dry Indoor & Light Industrial Atmosphere) |
| Reference Resistivity | 0.48 µΩ·m at 20°C ambient temperature |
| Temperature Coefficient of Resistance | Extremely low drift value within full working temperature band |
| Processing Performance | Ultra-high ductility, supports micro tight winding, no fracture after repeated tiny-radius bending |
Supply & Packaging Standard
Supply Form: Continuous ultra-fine solid CuNi44 wire densely and orderly wound on medium-size black industrial plastic spools; standard full-length medium reels and custom short cut small coil orders are both supported
Packaging: Individual dust-proof sealed outer bag for each spool plus shock-resistant foam padding, suitable for light bulk export shipment and clean indoor long-term inventory storage
MOQ: 1 medium black spool for small-batch prototype coiling testing; large-volume bulk supply for mini resistor manufacturers, compact thermocouple sensor factories and precision electronic component producers
Customization Service: Custom wire fine diameter, single spool winding length, annealing softness grade and surface gloss finish based on miniature resistance winding and slim temperature probe production demands
Typical Application Scope
Miniature Precision Resistor Winding: Core raw material for manufacturing micro low-drift wound resistors, tiny shunt resistors and compact load resistance coils for electronic circuits.
Slim Thermocouple Negative Leg Production: Matching negative alloy wire for narrow-diameter Type J & Type T temperature sensing wires and miniature surface contact thermocouple probes.
Micro Strain Measurement Equipment Components: Stable resistive wire for small laboratory testing instruments, mini strain detection modules and electrical calibration fixtures.
Compact Electronic Thermal Control Parts: Low-drift resistance coils for tiny precision temperature adjustment modules and portable electronic thermal regulators.
Light Industry Mini Electrical Resistance Components: Long-life resistive wire for small household appliance control circuits and miniature automation equipment signal balancing assemblies.
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