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?

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.

Regards,
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641- 3212