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  1. tickfaw

    alloy 20 tube to tube sheet welding

    Because of the timing of this problem (re the holidays ) I was unable to contact some of the people I would normaly contact with this problem. Since then I have contacted the manufactor that supplied the tubes (welded not seamless),I was told that because of the joint design it could not be...
  2. tickfaw

    alloy 20 tube to tube sheet welding

    I`m sorry I did not give all the imformation required to answer my request. Iam using 320lr wire and using pulse arc welding,that does spread the bead to the width you are refering to. the company we are doing this job for has just changed there specs from a 3 tube mock up to a 12 tube mock...
  3. tickfaw

    alloy 20 tube to tube sheet welding

    Im having cracking problems on the root pass. Im welding 3/4" alloy 20 tubes (.065 wall) to an alloy20 tubesheet (2" thick). We are making a 2 pass strengh weld, saving the tube end. We are maintaining a 250 degree preheat and slow cooling, using ER320 filler on both passes (.045 on...

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