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Oxygen-Free Copper

Oxygen-free copper is a high-quality copper material that is valued for its excellent electrical and thermal conductivity, ductility, and resistance to corrosion and oxidation. It is used for applications that require high electrical conductivity, such as in electrical wiring, transformers, and other electrical equipment. It is also used in high-performance audio and video equipment, where it can provide a clearer and more accurate signal.

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Oxygen Free Copper

Our wide range of oxygen-free copper is manufactured in Europe within our extended group. Many of our products are available from stock. We also have the capacity to create bespoke products, all of which are available on short lead times.

We carry a stock of oxygen-free copper C103 – CW008A and also C110 – CW009A (Certified Grade).

OFE-Cu Copper Certified Grade C110 – CW009A

This material is for electronic and similar applications. We supply an extremely high-purity certified grade copper with a minimum electrical conductivity as high as 101.5 IACS. The total content of impurities is less than 40 ppm (0.0040%), with no single impurity exceeding 25 ppm (0.0025%). This is to ensure high resistance to hydrogen embrittlement. The maximum oxygen content is restricted to 5 ppm (0.0005%).

The benefits of using oxygen-free copper are realised by the low content of highly volatile elements such as phosphorus, lead, arsenic, sulphur, zinc, cadmium and mercury resulting in low volatility under high vacuum and making OFE-Cu certified grade copper a product of major interest to the electronics industry. It is readily joined by brazing or welding and is the superior grade of copper for electron beam welding.

OF-Cu Copper C103 – CW008A

OF-Cu copper is immune to embrittlement when brazed, welded or held at high temperatures in a reducing atmosphere. It is also dimensionally stable when heated in a hydrogen atmosphere which can be a necessity in certain applications.


  • High purity
  • Highest possible electrical/thermal conductivity
  • Excellent formability, impact strength, weldability and brazability qualities
  • Brilliant for high-vacuum applications
  • Excellent surface quality
  • Very adherent oxide scale
  • High homogeneity and reliability
  • Immune to hydrogen embrittlement