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Nonferrous topics such as copper and aluminum, annealing, etc. go here.

TOPIC: Copper Casting Problem

Copper Casting Problem 5 years 2 months ago #1730

Good Morning,

We need some help with copper rod casting.

We are producing 8mm copper rod by Continuus Properzi. Our line speed is 12.5 meters/minute.

We are receiving a lot of customer complaints regarding holes inside the rod (porosity) and resulting tensile breaks. (At around 1mm to 0.8mm during wire drawing.)

We are maintaining the oxygen range 300-360 ppm and the melt temperature at 1100C to 1120C. Our rod has hydrogen range of 0.1 ppm to 1 ppm.

Kindly suggest a solution for us.
Thank you.

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Re: Copper Casting Problem 5 years 2 months ago #1731

Hello Sanjay;

a) Please download and carefully read this PDF file titled "Caster Filtration for Continuous Cast Copper Rod" by Mr. Gary L. Spence of Encore Wire. It can be found at:

b) Please note the title "Wire Quality" about halfway down and re-read what it says about center-line voids and resulting "cuppy wire or central burst breaks during subsequent wire drawing." This is where your problems lie if indeed you are experiencing center-line voids inside your rod.

Peter J. Stewart-Hay
Stewart-Hay Associates
519 641- 3212
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The following user(s) said Thank You: Dr Ravindra Kumar
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