About Smiths

We are a world-class supplier of engineering raw materials. Our objective is to provide all our customers, from the small machine shop to the large multi-national corporation, a supply path that continuously delivers the highest levels of service, quality and value.

C109 Copper (CW118C)

Copper Alloy

C109 Copper Alloy

C109 (CW118C) is a free-machining, oxygen-free copper.

Improved Machinability

The introduction of Tellurium content raises the machinability of the alloy considerably (to 90%); this increase in machinability does not impact on conductivity or ductility performance. C109 is not susceptible to hydrogen embrittlement and has good hot and cold workability. To add further value, we process all your copper grade material in-house.


C109 (CW118C) copper benefits from exceptional machining qualities and excellent electrical & thermal conductivity. With good hot and cold workability, C109 is not susceptible to hydrogen embrittlement.

Typical Applications

Commercial applications for this engineering material include:

  • Complex and intricate electrical components
  • Electrical switches
  • Circuit breaker terminals
  • Transformer terminals
  • Connector pins
  • High currency carrying components
  • Clamps
  • Bolts, nuts & studs

We stock C109 in flats, round bar and square bar.

Technical Assistance

Our knowledgeable staff and resident metallurgists will be pleased to assist you further on any technical topic. Smiths Metal Centres Limited also boasts an in-house UKAS Accredited Testing Laboratory which is unique within the multi-metal and plastic stockholding sector. We believe this underlines our total commitment to quality and our ethos of being the complete service provider.

Additional Info

A technical datasheet for C109 is available in PDF file format. To view and download, please click here.

We offer in-house processing options - for more information, please refer to our processing services.

Read our corporate brochure by clicking here.

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