Oxygen-free copper is typically specified according to the ASTM/UNS database. The UNS database includes many … See more

Conductivity is generally specified relative to the 1913 International Annealed Copper Standard of 5.8×10 S/m. Advances in the refining process now yield OF and ETP copper that can meet or exceed 101% of this standar… See more

For industrial applications, oxygen-free copper is valued more for its chemical purity than its electrical conductivity. OF/OFE-grade copper is used in plasma deposition (sputtering) processes, including the manufa… See more

The high-end speaker wire industry markets oxygen-free copper as having enhanced conductivity or other electrical properties that are supposedly advantageous to audio signal transmission. In fact, conductivity specificatio… See more

High-electrical-conductivity coppers are distinct from coppers deoxidized by the addition of phosphorus in the smelting process. Oxygen-free phosphorus-containing copper (CuOFP) is typically used for str… See more

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