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Annealing Copper

7 years 5 months ago #1239 by Archived Forum Admin
What is the annealing temperature range for copper CDA110? How can I tell whether it is over-annealed or not?

I annealed copper wire at 1600oF and found some bumps on the surface. What could have caused this defect?

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7 years 5 months ago #1240 by Archived Forum Admin
Hello wsc,

CDA #110 is 99.9% pure electrolytic tough pitch copper and the annealing temperature range is 600 to 1400 F. Keep in mind however that annealing is a time-temperature relationship. The degree of anneal is determined with a laboratory tension tester.

"Some bumps on the surface" is really not enough information to give us a clue as to what is going on. For instance we don't understand if this is over a whole spool of wire or perhaps just at one spot such as the end of the spool. We therefore suggest you read the following thread www.wirenet.org/forum/viewmessages.cfm?Forum=12&Topic=82

Looking at your company's website, we also suggest you discuss this further with a staff metallurgist or metallurgical engineer.

Peter J. Stewart-Hay
Stewart-Hay Associates
519 641- 3212

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