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Welding Unlike Sizes

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  • Welding Unlike Sizes

    This hasn't yet happened to me, but when welding unlike sizes of metal - let's say 1/8 plate to a 1/4 plate, do you weld at the smaller thickness setting to prevent burn-through? Or do you use the thicker size metal's setting? I'm inclined to think that you use the thinner metal's settings.

    Millermatic 210
    Lincoln AC-250
    Custom Harley FXR Pro-Street

  • #2
    brad i just did that last week, i was using a mm250 set it at 5 and 5 and favored the 1/4

    came out real warpage !

    i even suprised myself



    • #3
      use the setting for the heavier material and weld on that and push the puddle into the thinner material..
      Lincoln SP170T
      ESAB 875 Plasma
      Smith oxy set
      Dynasty 200DX
      pulsed mig is next...

      Long Island Cummins Ram Owners Club


      • #4
        Yup, heavier setting and wash it into the thin stuff. Concentrate most of the heat on the thicker side, and allow just enough to wash over to make a sufficient bead with out burning through. It takes some practice and patience at times, but it really is easy.

        '06 Trailblazer 302
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        Super S-32P feeder

        HH210 & DP3035 spool gun
        Esab Multimaster 260
        Esab Heliarc 252 AC/DC


        • #5
          Don has it, and is my philosophy as well whether mig or tig. Created a small pit of SS last week, had the bright idea to use 3/8" SS tubing for hinges on
          the sch 10 tube, was a bear till I screwed my head on correctly, LOL
          May the BLUE FORCE be with you