Oxygen-Free Copper Flat Bar | CW008A Cu-OF & CW009A Cu-OFE | EN13601
Cu-OF (CW008A) and Cu-OFE (CW009A) are high-purity oxygen-free copper grades supplied as flat bars for precision machining，demanding electrical applications and resistance to hydrogen embrittlement. Compared with electrolytic tough pitch copper (Cu-ETP), oxygen-free copper contains extremely low oxygen levels, making it suitable for applications involving vacuum environments, high-temperature processing, and high-reliability electrical systems.
Available in accordance with EN 13601, Cu-OF and Cu-OFE copper flat bars provide excellent machinability, weldability, and stable mechanical properties. They are commonly machined into electrical connectors, busbars, terminals, contact components, semiconductor parts, vacuum equipment, and other precision conductive components. While both grades offer outstanding purity and corrosion resistance, CW009A (Cu-OFE) provides higher copper purity and tighter impurity control than CW008A (Cu-OF), making it the preferred choice for demanding electronic and semiconductor applications.
CW008A (Cu-OF) vs CW009A (Cu-OFE)
CW008A (Cu-OF) is an oxygen-free copper grade offering excellent resistance to hydrogen embrittlement and high material purity. It is widely used for electrical, vacuum, and industrial applications requiring reliable conductivity.
CW009A (Cu-OFE) is a higher-purity oxygen-free electronic copper with superior electrical conductivity and stricter impurity control. It is primarily used in semiconductor, aerospace, ultra-high vacuum, and other high-end electronic applications.
| Property | CW008A | CW009A |
|---|---|---|
| EN Designation | Cu-OF | Cu-OFE |
| Oxygen Content | Extremely low | Extremely low (more tightly controlled) |
| Copper Purity | ≥99.95% | ≥99.99% |
| Electrical Conductivity | ≥100% IACS | ≥101% IACS (typically) |
| Applications | General high-purity electrical applications | High-end electronics, semiconductor, vacuum, aerospace |
cw008A CW009A COPPER FLAT BAR SIZES
Cu-OF and Cu-OFE copper Mechanical properties(h035 & h200 temper)
H035 — annealed condition
H200 — annealed condition
Cu-OF and Cu-OFE copper Applications
Busbars
Electrical connectors
Contact plates
Vacuum components
Semiconductor parts
How to choose between CW008A and CW009A
CW008A is suitable for most high-purity electrical and industrial applications, offering an excellent balance of performance and cost. CW009A provides higher copper purity and tighter impurity control, making it the preferred choice for semiconductor, aerospace, and other mission-critical applications.
| Grade | Typical Applications |
|---|---|
| CW008A (Cu-OF) | Vacuum equipment, electrical components, high-frequency conductors, industrial electronics, and other high-purity electrical applications. |
| CW009A (Cu-OFE) | Semiconductor equipment, electron beam systems, particle accelerators, aerospace electronics, ultra-high vacuum systems, cryogenic equipment, and other applications requiring maximum purity and conductivity. |
Shenzhen Chinalcometal Processing Services
Cutting to length
CNC machining
Surface finishing
Annealing
Precision drawing
Custom fabrication
