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Sulphur Copper Bar & Rod

S & D Non-Ferrous stocks Sulphur Copper bars in CW114C, a free-machining copper with a great, approximately 80% machinability rating. Adding sulphur to copper makes for a ‘free-machining copper’ as the sulphur acts as a chip breaker, making it noticeably easier to machine than pure copper and only having a minor effect on the conductivity of the metal.

The speed of machining can reach up to 4 times faster than those of pure copper. It has a greater tooling life span is also seen when using sulphur copper over pure copper. Sulphur Copper is a multipurpose metal as it combines the high thermal and electrical conductivity values that are usually only seen in pure copper, however, the ease of machining from the sulphur allows it to be used in a greater number of circumstances. Other qualities of CW114C have an easy solder ability and decent levels of corrosion resistance.

Our CW114C sulphur copper bars are readily available in a number of other formations, too. Our team will be happy to discuss these with you in further detail if you are unsure of the exact product you need.

We source all of our sulphur copper from UK and European suppliers to make sure our customers only receive top-quality stock that meets and exceeds industry standards. To discover more about our range of sulphur copper, please do not hesitate to contact a member of our knowledgeable S & D team today on 0121 525 5500. 

Sulphur Copper Bar & Rod CW114C Profiles we Stock

Flat Bar
Hexagon Bar
Hollow Bar
Round Bar
Round Bar
Square Bar
Square Bar

Need Sulphur Copper Bar & Rod CW114C in a hurry?

As one of the UK's largest independent metal stockists, we guarantee fast turn around and delivery!


Uses of Sulphur Copper Bar:

  • Electrical Contacts
  • Electrical Connectors
  • Cable Glands
  • Transformers
  • Circuit Breaker Terminals

Industries That Use Sulphur Copper Bar:

  • Electronics
  • Engineering
  • Automotive
  • Aviation

Sulphur Copper Bar Properties







Total Imps

0.1% max





Melting Point



8.94 g/cm³

Specific heat

385 J/Kg °K

Thermal conductivity

347 W/m°K

Thermal expansion coefficient (20-200°C)

17 x 10-6per °C

Electrical conductivity

93% IACS

Electrical resistivity

0.0181 microhm m

Modulus of elasticity

12500 Kg/mm²

Hot Working Temperature Range


Hot Formability


Cold Formability


Cold reduction between anneals

70% max.

Machinability rating (free cutting brass = 100)






Oxy-acetylene welding

Not Recommended

Gas-shielded arc welding

Not Recommended

Resistance welding: Spot and Seam Not Recommended
Butt Fair


Sulphur copper is the addition of sulphur to a standard copper. Pure copper has excellent thermal and electrical conductivity, as well as great ductility and corrosion resistance, but the metal has poor machinability.

When sulphur is introduced to copper, the workability of the metal significantly increases, without having to compromise on the favoured and beneficial aforementioned properties.  Pure copper has a machinability rating of 20%, in contrast to sulphur copper that has an 80% machinability rating.

Sulphur copper has machining speeds that are four times faster than pure copper and since the compound produces a much softer metal, it is less detrimental on tooling and machining components.

Sulphur copper is used in applications that require good corrosion resistance, excellent thermal and electrical conductivity, but also applications that demand easy forming and extensive machining that pure copper is unable to handle.

Some examples of these applications include:

  • Circuit Breakers

  • Electrical Connectors

  • Socket Connectors

  • Laser Nozzles

  • Transistor Bases

  • Relay Parts

  • Electrical Pins

Enquire About Sulphur Copper Bar & Rod CW114C Today

To discuss your requirements call S&D Non-Ferrous Metal Stockists today on 0121 525 5500

Quality Assured


Quality Assured

Why Choose Us?

  • Established for nearly 50 years
  • Extensive stock range of copper, brass and bronze
  • Same day / next day delivery on stock products
  • No job too big or too small
  • We tailor to your requirements
  • Able to source even unusual requirements

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