C103 / CW008A / OF Copper

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C103 / CW008A is a commercially pure oxygen free copper manufactured by re-melting and pouring in a protective gas atmosphere. The C103 has a minimum copper content of 99.95% and offers an electrical conductivity of greater than 100% IACS (the highest available from commercially pure copper) enabling it’s use in electronic applications.

Apart from the increase in thermal and electrical conductivity, the other benefit in the removal of oxygen is that C103 is not susceptible to hydrogen embrittlement when heated in a reducing atmosphere. This enables the Cu-OF alloy to be welded using gas shielded arc, butt and oxy-acetylene methods.

 Chemical Composition

Copper                            

99.95 min (incl.Ag)

Lead  

0.005% max

Bismuth                 

0.0010% max

Total Imps

0.03% max (excl. O2 & Ag)

Related Specifications

C103

BS EN 13601: CW008A

C10200

Cu-OF

2.0040

BS1433

Key Features

  • Excellent Conductivity Values
  • Freedom From Hydrogen Embrittlement
  • Excellent formability
  • Excellent Joining Characteristics

Typical Physical Properties

Melting Point  

1083°C

Density

8.9 g/cm³

Specific heat 

385 J/Kg °K

Thermal conductivity (RT)                      

393 W/m°K

Thermal expansion coefficient (20-200°C) 

17.3 x 10-6

Electrical conductivity                            

100-101.5% IACS 

Electrical Resistivity                               

0.01724 ohm mm2/m

Fabrication Properties

Hot Working Temperature Range

750-950°C

Hot Formability

Good

Cold Formability

Excellent

Cold reduction between anneals

95% max

Machinability rating

(free cutting brass = 100)  

20%

Annealing Temp. Range

200-650°C

Stress Relieving Temperature Range

150-200°C

  Joining Methods

Soldering

Excellent

Brazing

Excellent

Oxy-acetylene welding

Fair

Gas-shielded arc welding

Good

Resistance welding:   Spot and Seam

                               Butt                     

Not Recomended

Good

 Typical Uses:

Traditional uses for C103 copper include vacuum engineering, electronics, anodes, electrical instruments, rotor conductors for large generators and motors, flexible cables, cords, leads and electrical equipment at elevated temperatures in the presence of reducing gases, switch- gears and switching devices.

This technical information is given by Holme Dodsworth Metals without charge and the user shall employ such information at his own discretion and risk. For more detailed technical advice on temper selection, fabrication, joining, machining, physical and mechanical data please contact us as space does not permit the listing of every feature of the material.

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Holme Dodsworth Metals Limited.
59/69 Heaton Park Road.
Newcastle Upon Tyne NE6 1SQ
Registered in England. Company No. 00842702