Carbon Dioxide for welding

The active gas most used in welding processes.

First gas in MAG (Metal Active Gas) welding

The characteristic of having a low ionisation potential, meant that this gas was chosen as a vehicle for the generation of an electric arc. Today almost always mixed with argon, it has the function of restoring part of the carbon that is lost during the welding process and of releasing oxygen as active gas in the process.

It makes the arc very stable and allows a wide penetration into the joint to be welded.
-78,5 °C
Boiling point.
1,688 gr/lt
Solubility in H2O.
Relative density.
Related Gases
Acetylene for welding
Extremely unstable combustible gas under normal conditions. It is treated in special cylinders stabilised with a solvent: usually acetone. It generates a high flame temperature and remains the most productive fuel gas in this type of process.
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Argon for welding
Inert gas, 1.38 times heavier than air. It has a low ionisation potential which facilitates the ignition and re-ignition of the arc, giving it a high stability, generating few fumes. Its low thermal input promotes conical penetration. Being heavier than air, it offers good air displacement. It is used as a base for welding mixtures.
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Hydrogen for welding
Reducing gas, which generates glossy finishes. Generates highly energetic arcs depending on the percentage in the mixture due to its high thermal conductivity and dissociation energy. It has a plasmogenic effect. Offers good arc stability and fluidity.
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