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Help with Miller 252 and stainless

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  • Help with Miller 252 and stainless

    I am just an old farmer who welds to repair his equipment. I have a Miller 252 MIG and I have only used it for welding steel. I hope someone can help me set it up to weld some stainless. Do I need a different gun like I would with aluminum or just stainless wire and different gas? Thanks
    Just because you have one, doesn't mean you have to act like one.

    Miller 212
    Hobart 135
    Miller 375 X-treme
    Really antique Sears Arc N Spark
    O/A Torch Setup

  • #2
    You just need wire and trimix gas. You could use a spool gun so you could switch back and forth faster. That is handy if you don't do much ss.
    MillerMatic 251
    Maxstar 150 STH
    Cutmaster 42
    Victor Journeyman OA

    A rockcrawler, er money pit, in progress...

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    • #3
      Just buy some stainless wire and you can get the job done, In a perfect world you should use trimix gas, however if you at least using a 75% argon, 25%co2 you can get by with that, 90/10 works better yet.

      If its not critical than your good.

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      • #4
        Thanks guys. You covered both ends of the spectrum.
        Just because you have one, doesn't mean you have to act like one.

        Miller 212
        Hobart 135
        Miller 375 X-treme
        Really antique Sears Arc N Spark
        O/A Torch Setup

        Comment


        • #5
          You need to back purge I think you can use whatever shielding gas you have, Argon works with an oxygen regulator. Use a piece of metal big enough to reach past heat affected zone, tape it in place. Tape an acetylene torch nozzle in with a vent hole in the tape at the top. or you can use a paste made to substitute for back purge.
          I was able to remove part of my spool holder to fit a 1 lb spool. I think I remember needing different rollers.
          Dynasty 280DX
          Bobcat 250
          MM252
          Spool gun
          Twentieth Century 295
          Twentieth Century 295 AC
          Marquette spot welder
          Smith torches

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          • #6
            Originally posted by Portable Welder View Post
            Just buy some stainless wire and you can get the job done, In a perfect world you should use trimix gas, however if you at least using a 75% argon, 25%co2 you can get by with that, 90/10 works better yet.

            If its not critical than your good.
            exactly what I was going to say. ive welded stainless with 75/25. had no tri mix. it hasn't rusted but isn't in a corrosive environment.

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            • #7
              Originally posted by purplewg View Post
              I am just an old farmer who welds to repair his equipment. I have a Miller 252 MIG and I have only used it for welding steel. I hope someone can help me set it up to weld some stainless. Do I need a different gun like I would with aluminum or just stainless wire and different gas? Thanks
              I have tried to just stay out of this one. However, if you have no need to weld stainless per a spec or code and are ok with following some of the other suggestions, just weld it with your mild steel set up.

              Griff

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              • #8
                SStl wire does not weld out of position well. I would recommend Dual shield, flux core with shielding gas.
                AutoArc 230 (MM 210)
                3035 spoolgun
                Spectrum 625
                Dialarc HF w/Coolmate 4

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                • #9
                  Tri mix gas can be argon/CO2/oxygen or it can be helium/argon/CO2 so be careful what you ask for.

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