Fire-Refined High Conductivity Copper Alloy (UNS C11020)

Topics Covered

Chemical Composition
Physical Properties
Other Designations


Copper and alloys of copper are known for their excellent thermal and electrical conductivity and good corrosion resistance. UNS numbers C10100 to C13000 denote pure copper. The applications of the copper alloys are dependent on the type and quantity of the impurities that it is alloyed with.

Copper alloys that are free from oxygen content are best suited for applications that require high ductility and conductivity. This alloy is referred to as fire refined high conductivity (FRHC) copper alloy. It is used in the form of a brazing filler metal. It is used in applications such as roofing, flashing, fasteners and other industrial applications.

This datasheet will elaborate on the chemical composition and properties of copper UNS C11020 alloy.

Chemical Composition

The chemical composition of oxygen copper UNS C11020 is given in the following table.

Element Content (%)
Copper, Cu + Silver, Ag 99.9
Others balance

Physical Properties

The following table lists the physical properties of copper UNS C11020.

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

Other Designations

Some of the other designations that are used to denote copper UNS C11020 are as below:

  • FEDERAL QQ-B-650
  • ASTM B224


Copper UNS C11020 is used in the following applications:-

  • Architecture – for roofing, skylight frames, flashing and downspouts
  • Building – wire screening
  • Electrical – bus bars, panel boards, lead frames, terminal connectors
  • Fasteners
  • Industrial – chlorine cells, printing rolls, chemical process equipment, chimney cap screens and pressure vessels.


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