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C111 (CW114C) CopperC111 (CW114C) Copper

Free Machining Sulphur Copper

C111 (CW114C) is a free machining sulphur copper with a machinability rating of approximately 80% (free machining brass = 100%).

Commercially pure coppers are not the easiest metals to machine due to the materials softness. However, by introducing other alloying elements such as sulphur, this creates a ‘free machining copper’ with only slightly reduced conductivity. The addition of sulphur to the copper results in the effect of cutting the chips into short pieces - this enables a much higher machining speed than is possible with pure copper (up to 4 times). The material also promotes better tooling life expectancy.

C111 still retains high levels of electrical and thermal conductivity. It is a cost effective material since it can be machined at very high speeds without excessive tooling wear. C111 also offers a freedom from hydrogen embrittlement due to the addition of phosphorus in the deoxidisation process. Other benefits of the alloy include very good formability, it can be easily joined by soldering and offers high corrosion resistance.

Key Features:

C111 (CW114C) offers a freedom from hydrogen embrittlement which means it is suitable for use in areas such as sour gas applications. With high corrosion resistance, the alloy has good weldability and formability and retains its thermal and electrical conductivity characterstics, even though sulphur has been added as an alloying element. These characterstics are only slightly reduced.

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.

Download C111 (CW114C) Datasheet

Typical Applications:

  • Gas valve nozzles
  • Cable glands & fasteners
  • Circuit breaker terminals
  • Electrical contacts


We offer C111 (CW114C) in bar. Smiths Metal Centres has processing operations at all our UK service centre locations. We have a fully automated magazine feed CNC rod blanking line and with more than 30 power saws across the Group, we can cut your material to your size requirements.

Pick a Product

To find out more about Smiths Metal Centres extensive range of high quality copper, click on one of our products on the side menu of this web page. These products also include the new BS EN standard designation.

Have a question or need a detailed quote?

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on 0845 527 3331 or click here to contact us.