what gas do you use for mig welding
Gas Choices and Selections for MIG Welding Various Metals. Gas for MIG welding is what makes MIG welding possible. The name informs us of this; âMetal Inert Gas weldingâ. The gasses used are what shield the weld from the air. When Carbon Dioxide or Oxygen is added to the mixture, MIG welding is not technically MIG welding anymore. This is due to the fact that both Carbon Dioxide and Oxygen are not inert gasses. The process then becomes GMAW or Gas Metal Arc Welding. How deep the weld penetrates the metal welded.