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CHEMICAL ITEM STANDARD RESULT Copper : % 99.99 Min 99.97 Carbon : % 0.03 Max 0.01 Cobalt : % 0.001 Max0.0005 Iron : % 0.005 Max 0.002 Phosphorus : % 0.01 Max 0.005 Sulphur : % 0.03 Max 0.01 Zinc : % 0.003 Max 0.0011.