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MIG welding stainless steel

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  • MIG welding stainless steel

    I picked up a piece of stainless steel to practice with. I don't intend to do much with stainless but decided to try it. I've always heard a tri-mix gas is best and 75/25(which is what I used) leaves a lot of spatter. I didn't see much spatter but the brown stuff is what I didn't expect. I did brush it as best I could but would the correct gas still leave this brown color behind?

  • #2
    C25 doesn’t cause an increase in spatter in my experience, but the soot is from using the C25.

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    • #3
      Originally posted by breavis View Post
      ... I've always heard a tri-mix gas is best and 75/25(which is what I used) leaves a lot of spatter. I didn't see much spatter but the brown stuff is what I didn't expect. I did brush it as best I could but would the correct gas still leave this brown color behind?
      Where have you always heard that? It's well-documented that it's not a spatter issue, but a contamination issue from having CO2 in the shielding gas.

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      • #4
        Heard that on another forum. Thanks for the info

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