Copper and copper alloys
Selecting metal materials — Designation

Conventional designation (according to former French standards)

• For refined copper (at least 99.85% copper), the grade is indicated by :

  • the letters Cu, followed by the words :

    • a1 (a2, a3) for oxygen-containing copper,

    • b1 (b2, b3) for deoxidized copper with residual deoxidizer,

    • c1 (c2, c3) for deoxidized copper without residual deoxidizer.

• For copper alloys, the designation includes the symbol Cu, followed by the chemical symbols of the alloying elements, each followed by its percentage content.

  Example

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