Oxygen Free Copper (OF / OFHC Copper)
High Conductivity Copper Solutions by Huaxiao-Alloy
1. What Is Oxygen Free Copper?
(Not Just Copper, but a High-Performance Metal Solution)
Oxygen Free Copper (OF Copper / OFHC Copper) is a high-purity copper material manufactured under strictly controlled oxygen-free conditions. By eliminating oxygen during melting and casting, this copper grade achieves exceptional electrical conductivity, thermal conductivity, and reliability in demanding environments.
At Huaxiao-Alloy, Oxygen Free Copper is not treated as a simple raw material.
We position it as a high-performance electrical and thermal solution, engineered for industries where signal stability, heat transfer efficiency, and material purity directly affect system performance.
Compared with standard electrolytic copper, OF copper completely avoids hydrogen embrittlement and delivers superior performance in vacuum, high-frequency, and high-temperature applications.
2. Oxygen Free Copper Grades & UNS Numbers
Huaxiao-Alloy supplies the full range of internationally recognized Oxygen Free Copper grades:
| Grade | UNS No. | Common Designation |
|---|---|---|
| C10100 | UNS C10100 | OFHC Copper (Oxygen Free High Conductivity) |
| C10200 | UNS C10200 | Oxygen Free Copper (OF) |
| C10300 | UNS C10300 | Oxygen Free High Conductivity Copper |
Technical Insight from Huaxiao-Alloy:
C10100 OFHC offers the highest purity and is preferred for semiconductor, vacuum, and aerospace electronics.
C10200 / C10300 provide an optimal balance between purity, performance, and cost for industrial electrical systems.
3. Chemical Composition of Oxygen Free Copper
| Element | C10100 (%) | C10200 (%) | C10300 (%) |
|---|---|---|---|
| Copper (Cu) | ≥ 99.99 | ≥ 99.95 | ≥ 99.95 |
| Oxygen (O) | ≤ 0.0005 | ≤ 0.001 | ≤ 0.001 |
| Other Elements | ≤ 0.01 | ≤ 0.05 | ≤ 0.05 |
Why This Matters:
Ultra-low oxygen content ensures stable conductivity, excellent brazing performance, and long-term reliability, especially in sealed or hydrogen-containing environments.
4. Mechanical & Physical Properties
| Property | Typical Value |
|---|---|
| Electrical Conductivity | ≥ 101% IACS |
| Thermal Conductivity | ~ 390 W/m·K |
| Density | 8.94 g/cm³ |
| Tensile Strength | 200–250 MPa |
| Elongation | ≥ 30% |
Huaxiao-Alloy supports custom heat treatment and processing to optimize these properties for specific applications.
5. Key Advantages of Oxygen Free Copper
Extremely high electrical and thermal conductivity
Zero risk of hydrogen embrittlement
Excellent weldability and brazability
Superior surface quality and cleanliness
Reliable performance in vacuum and high-frequency environments
These advantages make OF copper a preferred solution rather than a commodity metal.
6. Typical Applications
Huaxiao-Alloy supplies Oxygen Free Copper for:
Electrical busbars and power connectors
Semiconductor and vacuum equipment
High-frequency and RF components
Heat exchangers and cooling systems
Precision electronic parts
High-end audio and signal transmission cables
7. Available Forms & Supply Capabilities
As a one-stop metal solutions provider, Huaxiao-Alloy offers Oxygen Free Copper in:
Sheets & Plates
Bars & Rods
Tubes & Pipes
Wires & Strips
Supported Standards:
ASTM B170 / ASTM B187 / ASTM B152
UNS C10100 / C10200 / C10300
EN CW008A / CW009A
✔ Custom sizes
✔ Precision cutting & machining
✔ Export-ready packaging
8. Oxygen Free Copper vs ETP Copper (C11000)
| Property | Oxygen Free Copper | ETP Copper |
|---|---|---|
| Oxygen Content | Extremely low | 0.02–0.04% |
| Electrical Conductivity | Higher | Slightly lower |
| Hydrogen Embrittlement | No risk | Possible |
| Typical Use | Electronics, vacuum | General electrical |
Huaxiao-Alloy Recommendation:
If your application involves high frequency, hydrogen exposure, or vacuum conditions, OF copper is the technically correct choice.
9. Standards & Quality Assurance
ASTM / UNS / EN compliance
ISO quality management
ROHS & REACH available upon request
Full material traceability
Huaxiao-Alloy ensures every shipment meets international compliance and project requirements.
Yes. OFHC copper offers higher purity, better conductivity, and eliminates hydrogen embrittlement risks.
Absolutely. OF copper shows excellent welding and brazing performance due to its ultra-low oxygen content.
Yes. We support custom sizes, processing, and export standards based on your project needs.
11. Why Choose Huaxiao-Alloy?
One-stop supplier for copper and alloy materials
Strong expertise in material selection & application support
Stable supply chain and export experience
Competitive pricing with consistent quality
Engineering-oriented approach, not just trading
At Huaxiao-Alloy, we help customers choose the right material, not just buy metal.
12. Get a Quote – Work with a Professional Copper Supplier
📧 Email: [email protected]
📱 WhatsApp: +1 (579) 300-2733
Let Huaxiao-Alloy provide reliable Oxygen Free Copper solutions for your next project.
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