stainless steel mig welding

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  • k2thab81
    Junior Member
    • Jan 2013
    • 15

    stainless steel mig welding

    I have never welded stainless before but I might be faced with it soon. Any tips? Pointers? Things to expect ? Thank you
  • MMW
    Senior Member
    • Sep 2005
    • 2694

    #2
    Make sure you use a trimix gas.
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    • k2thab81
      Junior Member
      • Jan 2013
      • 15

      #3
      What kind of wire is best? I know between .030-.045 in size

      Comment

      • mikeswelding
        Senior Member
        • Nov 2007
        • 205

        #4
        Not to overstate the obvious, but you will need stainless wire, probably 308 - it depends on the parent metal alloy. Size, of course, will depend on thickness of material and amps.

        Stainless warps like crazy when heated, so clamp, clamp, and then clamp some more.

        What he said about tri-mix gas.

        Comment

        • mikeswelding
          Senior Member
          • Nov 2007
          • 205

          #5
          Two more thoughts - stainless wire is not required for welding stainless, but if you use regular E70[xx], then the weld itself will rust. Also, depending on the structure of what you are welding, back purging may be necessary to prevent contamination. A thread search will tell you all you need to know about that.

          Comment

          • k2thab81
            Junior Member
            • Jan 2013
            • 15

            #6
            Thanks

            Comment

            • Daniel
              Senior Member
              • Dec 2009
              • 723

              #7
              are you welding SS? we weld on dipper buckets parts made of manganese with 309 and use C25 and it is the same way as any other fluxcore, use the voltage specified and adjust your wire speed.

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              • k2thab81
                Junior Member
                • Jan 2013
                • 15

                #8
                I haven't welded stainless yet, the opportunity might be coming though

                Comment

                • jessehornberger
                  Senior Member
                  • Mar 2009
                  • 138

                  #9
                  ss wire

                  i would suggust getting the L Si in the wire, So if 308 L Si, 309 L Si, or 316 L Si, it will run much smother.
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                  150lb Anvil
                  10" Swing Logan Lathe

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                  • bob_e95482
                    Senior Member
                    • Feb 2007
                    • 264

                    #10
                    I just did some SStl MIG at work, and I must add that out of position welds suck, just like using 308 stick.
                    AutoArc 230 (MM 210)
                    3035 spoolgun
                    Spectrum 625
                    Dialarc HF w/Coolmate 4

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