Oxygen Free Copper Alloy (UNS C10930)

Topics Covered

Chemical Composition
Physical Properties
Other Designations


Copper and alloys of copper are mostly used in applications that need good electrical and thermal conductivities. Copper and its alloys exhibit excellent resistance to corrosion. Pure copper is denoted using the UNS numbers from C10100 to C13000. The amount and the nature of the added impurities decide the applications for which the alloys are to be used.

Copper alloys that are free from oxygen content are best suited for applications that require high ductility and conductivity. The copper C10930 alloy is available in the form of plates and sheets. It exhibits very good corrosion resistance, in the presence of atmospheric corroding agents and brackish or sea water. However, exposure to oxidizing environments or oxidizing acids or moist halogens must be avoided.

This datasheet will elaborate on the chemical composition and properties of oxygen free copper UNS C10930 alloy.

Chemical Composition

The chemical composition of oxygen-free copper UNS C10930 is given in the following table.

Element Content (%)
Copper, Cu 99.9
Oxygen 0.02
Silver 0.044

Physical Properties

The following table lists the physical properties of copper UNS C10930.

Properties Metric Imperial
Density 8.9 gm/cm3 0.323 lb/in3

Other Designations

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Some of the other designations that are used to denote copper UNS C10930 are as below:-

  • ASTM B187
  • FEDERAL QQ-B-650


Some of the methods adopted for fabricating this alloy are coining, bending, coppersmith, upsetting and drawing. Other methods of fabrication are knurling, roll threading, spinning, swaging and stamping.

Forging - Copper UNS C10930 alloy has good forging ability.

Hot working - Copper UNS C10930 alloy has excellent hot working abilities.

Cold working - Copper UNS C10930 alloy has excellent cold working properties.


Copper UNS C10930 is used in the following applications:

  • Waveguides, lead-in-wires, co-axial cables
  • Bus bars and bus conductors
  • Anodes for vacuum tubes, vacuum seals, transistor components
  • Glass-to-metal seals, klystrons, rectifiers
  • Microwave tubes


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