Copper is available in a number of grades, with different properties, to suit different applications. All grades, except for CW024A (used for pipes and roofing) have electrical applications. The types of copper are oxygen free, tough pitch and phosphorus deoxidised, all of which may be alloyed with small amounts of silver which increases the temperature resistance. Compositions, properties and uses of wrought and unwrought coppers are provided in the table below.
The electrical conductivity is shown as % IACS (International Annealed Copper Standard), first used in 1913. Values greater than 100% reflect the higher purity copper now available. The mechanical properties of all the grades are very similar, shown in ranges from soft to hard.
Applicable product standards for wrought and unwrought coppers are provided elsewhere.
For more detail, the appropriate standard(s) should be consulted. Visit our page with details of standards and links to the BSI shop.