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  1. erfannehmet

    copper backing

    Thank you for helping These copper apear when we remove slag from outer weld.
  2. erfannehmet

    copper backing

    Thank you for your helping As I said before we are producing spiral steel pipe by submerged arc welding and used copper backing for ID welding. we have copper taint on the OD surface for six month. At first we think these copper taints comes from the copper backing but copper density is more...
  3. erfannehmet

    copper backing

    In your idia which one is better for backing? Aluminium Bronze nickel or berrylium copper?
  4. erfannehmet

    copper backing

    Tkank you for your answering we used copper bar with 99.9% Cu amd .0001% Be with HB=71.8 and have that problem. On the other hand we can not use copper grade with high hardness because of our equipment limitation.I wana know how many amount of beryylium should be needed for good result?
  5. erfannehmet

    copper backing

    Hi I work in spiral gas pipe production. We use copper backing for internal welding but we have a copper polution problem. Are there any persons who know good grade of copper with good abrasive resistance?

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