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ILF stock a full range of Copper square bar for use in a variety of industries, see below for full details of the sizes and thicknesses held in stock.

Due to its excellent conductivity, a copper square bar in grade C101, which we stock in considerable quantities This grade of copper is frequently used in electrical applications and also a popular material for use in general electronics, motor components, gas plants, sculpture, and architectural aspects.

Copper Square Bar Manufacturer and Stockholder in the UK

As the largest metal manufacturer and supplier within the United Kingdom, we’re able to provide high-quality copper, aluminium, steel, brass, bronze and many more alloys across the country in a short period. 

Our precisely manufactured copper busbars have the highest demand but we also supply square bars made of copper, aluminium, bronze, stainless steel and brass. We can manufacture a wide range of products in many different sizes. Our state-of-the-art EHRT metal bending and punching machines and CNC machining allow us to create custom profiles for any needs. ILF also has a large stock of copper wire, round bar, flat bar, sheet metal and tubes made of high-end alloys. 

Advantages of C101 Grade for Copper Square Bars

The formability of the copper square bar made from C101 is good, especially when using cold working techniques. Electric arc techniques like flux cored arc welding and soldering also provide great results.

A naturally hygienic material to use, copper square bar slows and kills viruses including e-Coli, MRSA, legionella, and flu and cold viruses because it is antimicrobial. Slugs are effectively repelled by it as well.

C101 is an oxygen-free electronic copper grade with a copper purity of 99.99 per cent and an oxygen value of 0.0005.

This grade is prized more for its chemical purity than for its electrical conductivity, and it has a minimum IACS conductivity rating of 101%. It is meticulously controlled and polished in an oxygen-free atmosphere.

One of the most expensive grades of copper is C101.

Copper square bar manufacturer and stockholder in the UK

Characteristics of C101 Copper Square Bar

  • Corrosion Resistance: Good
  • Cold Working: Good
  • Hot Working: Good
  • Heat Treatment: Fair
  • Machinability: Poor
  • Weldability: Excellent
  • Melting Point: 1083 °C
  • Thermal Conductivity: 391.1 W/m.K
  • Electrical Resistivity: 0.0171 x10^-6 Ω .m

Where to use C101 Copper Square Bar?

C101 copper is one of the most expensive alloy on the market because of its chemical purity. Some common uses of these square bars include high-end electronics, automotive, domestic appliances, general engineering and cold formed components.

5mm SQ - 120mm SQUp to 6000mm


British Standard (BS)Other designationsNominal composition
C101CW004A,C110,Cu-ETPCu 99.90% min
C103CW008A,C10200,Cu-OFCu 99.95% min
C109CW118C,C14500,CuTeCu 99%, Te 0.5%
C111CW114C,C14700,CuSPCu Rem, S 0.2%, Ph 0.003%


General engineering
CNC components

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Innovation, generation, transmission and connection are at the centre of what we do. We are proud to be leaders in our field of and offer a world-class service to UK and international brands.

We maintain excellent relationships with global suppliers of raw materials and have extensive experience in the sourcing, stockholding and distribution of nonferrous metals.

Customer satisfaction is of the utmost importance to us, which is why we ensure a premium service from Busbar design through to manufacture, plating and finishing, quality inspection and delivery. Our quality standards are matched only by our work ethic and the longevity of our customer relationships speaks volumes.

ILF guarantees:

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Offering quality and precision as standard in busbar and metal component supply