C106 (DHP; phosphorus deoxidised copper) is a grade of copper from which oxygen is removed by the controlled addition of phosphorus during the melting cycle. It is the material normally used for the manufacture of copper tubes as it can be readily welded or brazed. C106 has deep drawing characteristics superior even to those of tough pitch copper (C101).

The presence of phosphorus acts as a deoxidant, removing copper oxide which would otherwise react with hydrogen. The residual phosphorus remains alloyed with the copper within the specified range 0.013-0.050%. The copper content is 99.85% minimum and the grade should be specified for all non-electrical applications, especially those involving assembly by welding or brazing. Phosphorus deoxidised copper is not susceptible to hydrogen embrittlement which is a serious risk with non-deoxidised grades.

Related Specifications of C106

  • C12200
  • C12210
  • C12300
  • CW024A
  • BS2870
  • BS2871
  • BS2874
  • 2.0090
  • Cu-DHP
  • SF-Cu (DE)

Nominal Composition of C106

Cu 99.85% min

Key Features of C106

  • Good thermal conductivity
  • Non-magnetic & spark resistant
  • Good electrical conductivity
  • Good corrosion resistance
  • Outstanding formability
  • Excellent joining properties
  • Ideal for plating and polishing

Applications of C106

Chemical processing | Heat exchanger plant, calorifiers, chemical plant, storage tanks, refrigeration plant, chemical pipework, water and gas installations and tubing; soil and waste disposal

Other | Roofing sheet, architectural and decorative metalwork, air conditioning equipment and pipework, central heating systems, marine and general engineering fasteners and masonry fixings

Case Study

C106: engine cylinder blocks

Columbia Metals – a leading supplier of C106

With decades of experience and a huge range of stock, Columbia Metals is an industry leader in the supply of C106 and other high quality specialist engineering alloys.

To buy or learn more about C106 contact us now, or fill in the enquiry form on the right hand side and we will be in touch shortly.

  Related Specifications Mechanical Properties
Alloy Name BS UNS BS EN Others Ultimate Tensile Strength N/mm² Minimum Yield Strength N/mm² Elongation % Hardness HB  
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