4. Copper and copper alloys
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Conventional designation (according to former French standards)
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For refined copper (at least 99.85% copper), the grade is indicated by :
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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.
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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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Copper and copper alloys
Zinc and magnesium alloys
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