tough pitch copper

tough pitch copper

[′təf ′pich ‚käp·ər]
(metallurgy)
Copper refined in a reverberatory furnace to adjust the oxygen content to 0.2-0.5%.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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According to him, other rod manufacturers in the region produce electrolytic tough pitch copper rods where the oxygen content is 300 to 55 ppm while Nuhas Oman's copper purity is 99.9 per cent with oxygen content of less than 5 per cent.