Copper

Commercially Pure Copper - Metal for which the specified minimum copper content is not less than 99.88%, silver being counted as copper. Modified Copper - Metal for which the specified minimum copper content is less than 99.88% and not less than 99.3%, silver being counted as copper.

1) Arsenical, Tough Pitch Copper (Copper No. 141) - A modified tough pitch copper containing substantial amounts of arsenic regardless of origin or treatment.

2) Cathode Copper - A commercially pure copper electrolytically refined in cathode form.

3) Electrolytic Tough Pitch Copper (Copper No. 110) - A commercially pure high conductivity copper of any origin which has been refined by electrolytic deposition, then melted, oxidized, and brought to tough pitch or controlled low oxygen content, and finally cast into cakes, billets, wire bars, etc., suitable for hot or cold working, or both.

4) Fire Refined Copper (Copper Nos. 125, 127, 128, 129, and 130) - A commercially pure copper of any origin or type which is finished by furnace refining without at any stage having been electrolytically refined.

5) Lake Copper (Copper Nos. 113, 114, 115, 116, 125, 127, 128, 129, and 130) - A commercially pure copper from the Lake Superior district generally fire refined and containing variable, but controlled amounts of silver and arsenic. Such copper of low arsenic content is called Prime Lake Copper, while that of higher arsenic content is called Arsenical Lake Copper--also Low, Medium, and High Arsenical Lake Copper. Also see Arsenical Copper and Silver Bearing Copper.

6) Oxygen Free Copper (Copper Nos. 101 and 102) - A commercially pure high-conductivity copper which has been produced in such a manner as to contain no oxide or residual deoxidants. It has very high resistance to hydrogen embrittlement.

7) Oxygen-Free, Silver Bearing Copper (Copper Nos. 104, 105, and 107) - A commercially pure high-conductivity copper containing the designated element (silver) in amounts as agreed upon between the supplier and the consumer for the purpose of raising the softening temperature.

8) Phosphorous Deoxidized Arsenical Copper (Copper No. 142) - A modified deoxidized copper containing the designated element (arsenic) in amounts as agreed upon between the supplier and the consumer mainly for the purpose of increasing corrosion resistance.

9) Phosphorous Deoxidized Copper, High Residual Phosphorous (Copper No. 122) - A commercially pure copper which has been deoxidized with phosphorous, leaving a relatively high residual phosphorous content. It is not susceptible to hydrogen embrittlement but is of relatively low electrical conductivity due to the amount of phosphorous content.

10) Phosphorous Deoxidized Copper, Low Residual Phosphorous (Copper No. 120) - A commercially pure copper which has been deoxidized with phosphorous in such a manner as to leave a very low phosphorous content. It is not readily susceptible to hydrogen embrittelment and has an electrical conductivity slightly lower than that of high-conductivity copper.

11) Phosphorous Deoxidized Copper, Silver Bearing (Copper Nos. 121 and 123) - A commercially pure deoxidized copper containing the designated element (silver) in amounts agreed upon between the supplier and the consumer.

12) Phosphorous Deoxidized Copper, Tellurium Bearing Copper (Copper No. 145) - A modified deoxidized copper containing the designated element (tellurium) in amounts as agreed upon between the supplier and the consumer to improve machinability. The electrical conductivity is somewhat lower than that of electrolytic tough pitch copper.

13) Silver Bearing (Argentiferous) Copper (Copper Nos. 104, 105, 107, 113, 114, 115, 116, 121, 123, 127, 128, 129, and 130) - Any copper containing substantial amounts of silver, regardless of origin or treatment.

14) Silver Bearing Tough Pitch Copper (Copper Nos. 113, 114, 115, and 116) - A commercially pure high conductivity tough pitch copper containing silver in amounts agreed upon between the supplier and the consumer for the purpose of raising the softening temperature.

15) Tough Pitch Copper (Copper Nos. 110, 111, 113, 114, 115, 116, 125, 127, 128, 129, 130, and 141) - Commercially pure or modified copper, either electrolytically or fire refined, containing a controlled amount of oxygen for the purpose of obtaining a level set in the casting.

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