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Copper Coil

Available Configurations

Properties common to all products in this list

Composition: Cu Form: Coil Material: Copper CAS Number: 7440-50-8 Commodity: Metals
Purity Thickness Coil Width Length Temper ⓘ Other Variant
99.9% (3N) to 99.99% (4N) 0.005 mm to 0.7 mm 0.25 mm to 350 mm 0.1 m to 3000 m Annealed
Hard
Half Hard
As Rolled
Oxygen-Free High Conductivity

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Copper Coil is pure copper foil in a continuous spooled format, combining the well-documented electrical and thermal performance of copper with the consistent geometry and uninterrupted length that roll-to-roll processing and high-volume converting operations demand. With an electrical resistivity of just 1.69 µΩ·cm at 20 °C and thermal conductivity of 401 W/m·K, copper remains the benchmark conductor for applications where minimising resistive loss and maximising heat dissipation are critical design requirements. In the soft condition it offers a tensile strength of 224 MPa and excellent ductility for winding and forming operations; hard-drawn coil reaches 314 MPa for applications requiring greater mechanical integrity in the finished component. The coil format is well suited to automated winding for inductive components and transformers, battery current collector production, EMI and RF shielding layer converting, flexible circuit substrate fabrication, and busbar lamination — anywhere that consistent foil properties across the full roll length directly affect product performance and yield. Its face-centred cubic structure and good cold-working behaviour support tight winding tolerances and reliable layer-to-layer consistency without the surface variation that can arise from handling cut sheet. In research and pilot production, copper coil provides a reproducible, well-characterised metallic substrate for electrochemical studies, thin-film deposition, surface treatment development, and corrosion characterisation wherever traceability and dimensional consistency across extended lengths are experimental requirements.
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Key Features

Copper Coil is pure copper foil in a continuous spooled format, combining the benchmark electrical and thermal performance of copper with consistent geometry and uninterrupted length for roll-to-roll processing and high-volume converting operations:

Benchmark Electrical & Thermal Performance (1.69 µΩ·cm, 401 W/m·K)

With an electrical resistivity of 1.69 µΩ·cm at 20 °C and thermal conductivity of 401 W/m·K, Copper Coil remains the benchmark conductor for applications where minimising resistive loss and maximising heat dissipation are critical design requirements across the full roll length.

Mechanical Range from Soft to Hard-Drawn (224–314 MPa)

In the soft condition Copper Coil offers a tensile strength of 224 MPa and excellent ductility for winding and forming operations; hard-drawn coil reaches 314 MPa for applications requiring greater mechanical integrity in the finished component — allowing the same material system to serve both winding and structural applications.

Face-Centred Cubic Structure for Consistent Cold-Working

Copper Coil's face-centred cubic structure and good cold-working behaviour support tight winding tolerances and reliable layer-to-layer consistency without the surface variation that can arise from handling cut sheet — ensuring consistent foil properties across the full roll length in automated winding operations.

Continuous Spooled Format for Roll-to-Roll Processing

The coil format is well suited to automated winding for inductive components and transformers, battery current collector production, EMI and RF shielding layer converting, flexible circuit substrate fabrication, and busbar lamination — anywhere that consistent foil properties across the full roll length directly affect product performance and yield.

Reproducible Substrate for Research & Pilot Production

Copper Coil provides a reproducible, well-characterised metallic substrate for electrochemical studies, thin-film deposition, surface treatment development, and corrosion characterisation in research and pilot production, wherever traceability and dimensional consistency across extended lengths are experimental requirements.

Industrial Applications

Copper Coil is used across electronics, energy, and research sectors where a continuous, well-characterised copper foil in consistent geometry is required for roll-to-roll processing and precision converting:

Automated Winding for Inductive Components & Transformers
Used as winding stock for inductive components and transformers in automated production, where an electrical resistivity of 1.69 µΩ·cm minimises resistive losses and the continuous coil format with consistent foil properties across the full roll length supports reliable layer-to-layer electrical performance throughout high-volume winding operations.
Battery Current Collector Production
Employed as battery current collector stock in high-volume production, where consistent foil thickness and electrical performance across the full roll length directly affect cell yield and electrochemical consistency in lithium-ion and other battery chemistries requiring copper current collectors.
EMI & RF Shielding Layer Converting
Used in EMI and RF shielding layer converting where the continuous roll format supports automated cutting and lamination of shielding layers and the benchmark electrical conductivity of copper ensures maximum shielding effectiveness in finished assemblies.
Flexible Circuit Substrate Fabrication & Busbar Lamination
Applied in flexible circuit substrate fabrication and busbar lamination where good cold-working behaviour, tight winding tolerances, and consistent surface quality across the full roll length support reliable patterning, bonding, and lamination in precision electronic assemblies.
Electrochemical Studies & Surface Treatment Research
Used in electrochemical studies, thin-film deposition, surface treatment development, and corrosion characterisation in research and pilot production, where traceability and dimensional consistency across extended coil lengths provide a reproducible, well-characterised metallic substrate for experimental programmes.

Material Properties

Atomic Properties
Element Value
Atomic number 29
Crystal structure Face centred cubic
Electronic structure Ar 3d¹⁰ 4s¹
Valences shown 1, 2
Atomic weight( amu ) 63.546
Thermal neutron absorption cross-section( Barns ) 3.8
Photo-electric work function( eV ) 4.5
Natural isotope distribution( Mass No./% ) 65/ 30.8
Natural isotope distribution( Mass No./% ) 63/ 69.2
Atomic radius - Goldschmidt( nm ) 0.128
Ionisation potential( No./eV ) 4/ 55.2
Ionisation potential( No./eV ) 6/ 103
Ionisation potential( No./eV ) 1/ 7.73
Ionisation potential( No./eV ) 5/ 79.9
Ionisation potential( No./eV ) 3/ 36.8
Ionisation potential( No./eV ) 2/ 20.29
Mechanical Properties
Element Value
Material condition Soft
Material condition Hard
Poisson's ratio 0.343
Poisson's ratio 0.343
Bulk modulus( GPa ) 137.8
Bulk modulus( GPa ) 137.8
Tensile modulus( GPa ) 129.8
Tensile modulus( GPa ) 129.8
Izod toughness( J m⁻¹ ) 68
Izod toughness( J m⁻¹ ) 58
Hardness - Vickers( kgf mm⁻² ) 87
Hardness - Vickers( kgf mm⁻² ) 49
Tensile strength( MPa ) 314
Tensile strength( MPa ) 224
Yield strength( MPa ) 270
Yield strength( MPa ) 54
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 1.69@20°C
Temperature coefficient( K⁻¹ ) 0.0043@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV ) 0.76
Physical Properties
Element Value
Boiling point( C ) 2567
Density( gcm⁻³ ) 8.96@20°C
Thermal Properties
Element Value
Melting point( C ) 1083
Latent heat of evaporation( J g⁻¹ ) 4796
Latent heat of fusion( J g⁻¹ ) 205
Specific heat( J K⁻¹ kg⁻¹ ) 385@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 401@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 17@0-100°C
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Available Configurations

Properties common to all products in this list

Composition: Cu Form: Coil Material: Copper CAS Number: 7440-50-8 Commodity: Metals

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Tolerances

Coil
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%
Thickness >0.05mm ±10%
Coil Width <100mm ±1mm
Coil Width >=100mm +2% / -1%
Length +10% / -0%