EN 13601 Oxygen-Free Copper Flat Bar Cu-OF (CW008A) Cu-OFE (CW009A)
Cu-OF (CW008A) and Cu-OFE (CW009A) are high-purity oxygen-free copper grades supplied as flat bars and rectangular bars for demanding electrical, electronic, and precision engineering applications. Cu-OF (CW008A) contains a minimum of 99.95% copper and offers excellent electrical conductivity, thermal conductivity, and formability. Cu-OFE (CW009A) is an electronic-grade oxygen-free copper with a minimum copper content of 99.99%, providing even higher purity and conductivity for critical applications such as vacuum systems, semiconductor equipment, scientific instruments, and high-performance electrical components.
Cu-OF VS Cu-OFE Grade comparison
Cu-OF · CW008A
Oxygen-free copper with purity ≥ 99.95%. Excellent conductivity and corrosion resistance, suitable for electrical and power distribution applications where oxygen content must be eliminated.
Cu-OFE · CW009A
Electrolytic-grade oxygen-free copper with purity ≥ 99.99%. The highest-purity option — ideal for vacuum equipment, semiconductor processing, electron beam devices and audiophile-grade conductors.
cw008A CW009A COPPER FLAT BAR SIZES
cOPPER EN 13601 Mechanical properties
H035 — annealed condition
H200 — annealed condition
Technical Notes
Current-carrying capacity is calculated in accordance with DIN 43671 at an ambient temperature of 35°C and a conductor temperature of 65°C. The values apply to AC, DC, and 16⅔ Hz systems. Actual current capacity depends on conductor dimensions, installation conditions, and cooling efficiency. Tin plating is available to improve corrosion resistance and solderability.
Typical Applications
Vacuum and controlled-atmosphere equipment — Vacuum furnaces, electron beam welding machines, magnetrons, klystrons, and other vacuum systems where low outgassing and material purity are critical.
Semiconductor and microelectronics manufacturing — Target materials, electrode components, and precision conductive parts requiring ultra-high purity and contamination control. Cu-OFE (CW009A) is commonly specified for these applications.
Hydrogen and reducing-atmosphere processing — Brazing, heat treatment, and other high-temperature processes where oxygen-free copper is required to eliminate the risk of hydrogen embrittlement.
Busbars and power distribution equipment — Busbar conductors, switchgear systems, transformer windings, and electrical distribution assemblies that require certified oxygen-free copper.
Renewable energy systems — Solar power equipment, inverter busbars, wind power systems, and other energy infrastructure projects specifying high-purity copper conductors.
Railway electrification — Power transmission and traction systems requiring reliable conductivity and long service life.
Induction heating equipment — Conductive components and current-carrying parts exposed to demanding thermal and electrical conditions.
High-frequency and RF applications — RF conductors, microwave components, and signal transmission systems where material purity helps maintain signal integrity.
High-end audio and specialty wiring — Audiophile-grade cables and precision wiring applications where oxygen-free copper is preferred for its high purity and conductivity.
Shenzhen Chinalcometal Processing Services
Cutting to length
CNC machining
Surface finishing
Annealing
Precision drawing
Custom fabrication
