Shielding Gas For Mig Welding Mild Steel. Shielding gas protects the melting metals from being exposed to outside gases by using a steady stream of a different type of gas. What gas is best for MIG welding.
It is the least expensive of the shielding gases. For carbon Steel or any other carbon Steel the best MIG welding gas would be the mixture of 75 Argon and 25 CO2. Ad Find China Manufacturers Of Mig Welding.
ArgonCO2 mix or Argoshield result in easier and neater welds given an unrestricted choice of gas but a MIG welder can be used with CO2 pub gas if you can put up with increased spatter and a less steady arc.
Each of these gases has its pros and cons. Can I use argon for MIG welding mild steel. For ½ inch nozzles your typical flow setting should be around 22-27 CFH. Although all of the above can be used on mild steel you must make your selection based on the application.