How to weld > Shielding gas
Selection of shielding gas for MAG welding
Due to the influence of the shielding gas, the final welding performance is a combination of the properties from each individual gas component.
An increased fraction of a gas component leads to a greater influence of the characteristics for that specific gas.
The typical penetration profiles for different gas mixtures are illustrated below in the illustration below for the welding of fillet joints.
Schematic penetration profiles when varying the composition of the shielding gas during MAG welding: a) Ar+ and 2% CO2. b) Ar+ and 5% CO2. c) Ar+ and 10% CO2. d) Ar+ and 20% CO2. e) 100% CO2.
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