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Questions concerning iron and steel, steel making, rod rolling, galvanizing, springs, nails, fencing, and patenting go here.

TOPIC: elongation

elongation 2 weeks 1 hour ago #3127

Hi,

I have a question about elongation and how to get better results.

We are trying to get better elongation with a 1030 carbon rod being drawn down from a 7/32 or 5.5m rod being drawn down to two different sizes @.120 and 105. with the .120 using a .186, .160, .138, .120. We are only getting a .3% elongation with a tensile of 155 ksi.but we need 7% elongation so my question is will using more dies increase the elongation? We have a Frigerio 7 block machine so we can use all 7 dies if needed.. Moreover does a harder reduction at the first block improve the elongation?

We haven't tested the 105 yet.

This is a toll processing job so I'm not sure of the chemical makeup of the rod. The 1030 we're using is just something we had in house. In fact our customer wants us to tell them what we need for the job. Is there a way to process the rod to help with elongation?

We are considering using a 1020 carbon rod but we're not sure if it will meet the tensile requirements? The .120 has to be between 145-160 ksi and the.105 from 145-175 ksi.

Thanks in advance for any help
Last Edit: 1 week 6 days ago by Peter J Stewart-Hay.
The administrator has disabled public write access.

elongation 5 days 13 hours ago #3131

From Eduardo Anaya;

Try the following manufacturing methods:
  • C1018 Rod Reduction of Area Reduction of Area
  • Diameter Diameter

  • % %
  • 0.218" ---- 0.218” ----
  • 0 .195 20 0.190 24
  • 0 .175 19 0.167 23
  • 0.160 17 0.149 21
  • 0.146 16 0.134 19
  • 0.136 14 0.122 17
  • 0.127 12 0.113 15
  • 0.120 11 0 .105 13
Expected tensile Expected tensile
160 KSI 150 KSI

If the expected elongation is not met, work with your rod supplier for a special chemistry rod.
Regards,
Peter J. Stewart-Hay Principal
Stewart-Hay Associates
www.Stewart-Hay.com
This email address is being protected from spambots. You need JavaScript enabled to view it.
Last Edit: 23 hours 35 minutes ago by Peter J Stewart-Hay.
The administrator has disabled public write access.
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