Chemically Refined Tough Pitch Copper Alloy (UNS C11030)

Topics Covered

Chemical Composition
Physical Properties
Other Designations


Copper and its alloys exhibit excellent thermal and electrical conductivity and good corrosion resistance. The UNS numbers C10100 to C13000 denote pure copper. By varying the type and amount of impurities we can make use of the copper alloys for various applications.

Copper alloy C11030 is referred to as chemically refined tough pitch (CRTP) copper. It is used in the form of a brazing filler metal. This alloy is registered with the US EPA as an anti-microbial.

This datasheet will elaborate on the chemical composition and properties of copper UNS C11030 alloy.

Chemical Composition

The chemical composition of copper alloy UNS C11030 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 alloy UNS C11030.

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 alloy UNS C11030 are as below:

  • FEDERAL QQ-B-650
  • ASTM B224


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 C11030 alloy has good forging ability.

Hot working - Copper UNS C11030 alloy has excellent hot working abilities.

Cold working - Copper UNS C11030 alloy has excellent cold working properties.


Copper UNS C11030 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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