hobby weld gas?

  1. johnakay

    johnakay Member

    Messages:
    1,456
    teesside
    couldn't get Hobbyweld gas no 5 so I settled for no 15.
    this does burn a lot hotter.
    what I have notice on some of my welds is that the weld look as though it sitting on top rather than panertrating. also under cut. this I know cause by to much heat.
    have others experience this with hobby weld no15.
    never got it on no 5.
     
  2. Rrobson

    Rrobson Member

    Messages:
    247
    Location:
    West Yorkshire
    The higher the co2 content the hotter it will burn. Co2 is the active part of the mix, which is why pure co2 burns the hottest.
    It sounds like your welding thinner material, otherwise you likely wouldn’t notice. Because you’ve changed gas you’ll have to dial your settings in again to match.
    I thinks it’s something like 5mm+ is recommended for 15% co2 but with careful welder set up and good torch control you should easily manage thinner material.
    Sitting on top wouldn’t necessarily be a gas issue, likely incorrect settings
     
  3. johnakay

    johnakay Member

    Messages:
    1,456
    teesside
    yes thinner metal. 1,5-1.7 mm tubing,brackets 2.5, 10 mm bars etc.so a bit of mixed really.
     
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