C10100 Oxygen Free Copper Round Bar

With 99.99% copper content, 101 copper has higher purity than 110 copper, resulting in superior electrical conductivity. It's commonly called OFE and OFHC copper. Use it in electrical applications, such as for coaxial cables and terminal lugs.

All sizes are produced to ASTM B187.

1/8" Diameter - 6" Diameter: H04 Temper

6-1/2" Diameter - 9" Diameter: M30 Temper


C10100 Oxygen Free High Conductivity Copper is produced by the direct conversion of selected refined cathodes and castings under carefully controlled conditions to prevent any contamination of the pure oxygen-free metal during processing. The method of producing O.F.H.C. copper insures an extra high grade of metal with a copper content of 99.99%. With such small content of extraneous elements, the inherent properties of elemental copper are brought forth to a high degree. Among such characteristics are high ductility, high electrical and thermal conductivity, high impact strength, good creep resistance, ease of weldability and low volatility under high vacuum.

Typical Uses

Automotive rectifiers

Transistor component bases, high resistance-ratio cryogenic shunts, bus conductors, wave guides, hollow conductors, anodes for vacuum tubes, coaxial cable, coaxial tube, klystrons, microwave tubes, bus bars, lead-in wire, vacuum seals, conductors, glass-to-metal seals.

Other Designations

101 OFEC, C101, C10100, CA 101, CDA 101, OFE 101, OFEC, OFE Copper, OFE Cu, Electronic Grade Copper