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OFHC Copper Coil
Available Configurations
Properties common to all products in this list
| Purity | Thickness | Coil Width | Length | Temper ⓘ | Other Variant |
|---|---|---|---|---|---|
| 99.9% (3N) to 99.99% (4N) | 0.006 mm to 0.5 mm | 0.43 mm to 305 mm | 0.1 m to 1000 m | Annealed Hard Half Hard Soft |
Standard Copper (CP up to 99.99%) |
Need custom configurations? Please contact us.
Key Features
OFHC Copper Coil is a ≥99.95% pure copper foil in a continuous spooled format, produced by a casting and rolling process that eliminates dissolved oxygen — delivering the highest electrical and thermal performance available in a copper foil coil with full compatibility with high-temperature, vacuum, and reducing-atmosphere processing:
Maximum Electrical & Thermal Performance (101% IACS, 401 W/m·K)
With conductivity reaching 101% IACS, electrical resistivity of 1.69 µΩ·cm, and thermal conductivity of 401 W/m·K, OFHC Copper Coil delivers the highest electrical and thermal performance available in a copper foil coil — properties preserved in full because the absence of oxygen removes the oxide inclusions that contribute to electron scattering and resistivity increase in lower-purity grades.
Oxygen-Free Production Prevents Hydrogen Embrittlement
The elimination of dissolved oxygen prevents the hydrogen embrittlement and internal void formation that degrade standard copper under high-temperature brazing, vacuum processing, and reducing-atmosphere environments — making OFHC Copper Coil the material of choice wherever standard copper foil would fail under processing conditions.
Vacuum Compatibility & Low Outgassing
OFHC Copper Coil's low outgassing behaviour and compatibility with precision cleaning protocols make it well suited to vacuum chamber liners, beamline components, and ultra-high vacuum assemblies in accelerator technology and quantum electronics, where gas evolution from coil materials would contaminate the vacuum environment.
Continuous Spooled Format with Tight Thickness Tolerances
The coil format provides consistent geometry and uninterrupted length for roll-to-roll converting, automated winding, and precision strip-feeding operations, with tight thickness tolerances maintained across the full roll length to support reproducible results in demanding production environments.
Traceable Purity for Research Applications
At ≥99.95% purity with traceable electrical properties, OFHC Copper Coil provides the material consistency required in accelerator technology, quantum electronics, and surface science studies where low outgassing, high purity, and well-characterised physical properties are experimental requirements rather than simply commercial specifications.
Industrial Applications
OFHC Copper Coil is used across power electronics, cryogenics, vacuum technology, and research sectors where electrical performance, thermal stability, and vacuum compatibility must be combined in a continuous foil format:
- ✦ RF Cavity Shielding & EMI Shielding
- Used in RF cavity shielding and EMI shielding for sensitive electronics, where conductivity reaching 101% IACS and the absence of oxide inclusions ensure the lowest possible resistive losses and maximum shielding effectiveness in continuous roll-converted shielding layers.
- ✦ Cryogenic Heat Exchanger Strip & Superconducting Magnet Current Leads
- Employed as cryogenic heat exchanger strip and current lead stock in superconducting magnet assemblies, where OFHC copper's thermal conductivity of 401 W/m·K, freedom from hydrogen embrittlement, and vacuum compatibility support reliable performance at cryogenic temperatures under demanding thermal and electrical loading.
- ✦ Vacuum Chamber Liners
- Used as vacuum chamber liner material where low outgassing, compatibility with precision cleaning protocols, and freedom from oxygen-related contamination sources ensure that the copper lining does not degrade vacuum quality or introduce contaminants into sensitive vacuum-based processes.
- ✦ Inductive Winding Stock in Power Electronics
- Applied as inductive winding stock in power electronics where low-loss energy transfer is non-negotiable, and the continuous coil format with tight thickness tolerances across the full roll length supports consistent winding geometry and layer-to-layer electrical performance throughout automated production.
- ✦ Accelerator Technology & Quantum Electronics Research
- Used in accelerator technology, quantum electronics, and beamline components wherever the low outgassing, high purity, and traceable electrical properties of oxygen-free copper are experimental requirements — providing a specification-controlled foil stock for research applications where standard copper would introduce unacceptable contamination risk.
Tolerances
| 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% |