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Nonferrous topics such as copper and aluminum, annealing, etc. go here.
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TOPIC: Torsion Test

Torsion Test 2 years 6 months ago #1372

Dear Sir,

I am working in copper rod plant.I want some clarification with respect to Torsion Test.We are doing 25*25 RTF(25 rounds(counts) in forward direction and 25 rounds(counts) in reverse direction.Based on the counts(breakage of rod while in reverse direction),we are deciding the quality of the rod.If it comes 20 or more,we are grading as good.

The problem now is we are not getting the consistency in the values.Out of six coils,four coils will come above 20 and two coils come below 6.

Can you please tell me,what are all factors affecting the torsion test?
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Re: Torsion Test 2 years 6 months ago #1373

Hello again Copper,

We note from your public profile that you are a Process Engineer in a copper rod mill.

Your question today was discussed with "kishor" two weeks ago on the 21 of July (Thread No. www.wirenet.org/forum/viewmessages.cfm?Forum=12&Topic=720 ) . By IP Number, we also note that you and "kishor" are working in the same small country and I imagine that you both work for the same company. That is because, to my understanding, there is only one rod mill in the entire country.

Since you work for a copper rod mill, surely you have metallurgists on staff that you can discuss basic copper properties and testing in great detail with. Likewise, I am sure that you have a very good engineering faculty in a nearby university. If there is no metallurgical engineering department to discuss basic copper properties and testing with, I bet there are metallurgical engineers on staff in the mechanical engineering department.

The university bookstore may also sell one or two metallurgical engineering textbooks that may well enhance your company's technical library. Moreover non-specific torsion testing discussions may indeed be found in a second year mechanical engineering "Strength of Materials" textbook.

Your company still appears to seriously need a technical library ASAP. This has been mentioned twice before to you and once before to "kishor"


Regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641-3212
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Re: Torsion Test 2 years 6 months ago #1374

Many years ago there was an article in the Wire Journal regarding SouthWire using this test to grade rod. You might be able to get a copy for reference purposes.

richard
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Re: Torsion Test 2 years 6 months ago #1375

Dear Sir,

Thank you for the information.can you please tell me where and how i can get this ?
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Re: Torsion Test 2 years 6 months ago #1376

Hello again,

1) - Go to the WAI Abstract Search section.
2) - Type in Copper Rod in the description.
3) - Search - There are 84 abstracts available.
4) - Review the abstract detail and order what you want by following the appropriate link.

www.wirenet.org/technical/abstract/abstract.cfm

Regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641-3212
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Re: Torsion Test 2 years 6 months ago #1377

I am currently on tour in India, and by no means is it a small country. In my current 3 weeks I will be travelling close to 15,000kms in the country ( not counting the 25,000 to get there and back) and will be visiting 8 of the 9 copper rod plants in India as part of our product and technical support to our customers.
Im not sure which plant "copper" is at, if the moderator can help?
But 25 x 25 twist test return to failure is a one of the indicators of rod quality and in the most part low twist results are a indicator of bar / casting problems.

Regards
Lawrie White
RichardsApex AustralAsia
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