Multiple uses in the metal fabrication sector
Hydrogen can be used pure or in a mixture. The mixture consisting of small percentages of Hydrogen and Argon is frequently used in welding processes as shielding gas for the TIG / MIG process of austenitic and copper steels or in MAG welding of austenitic steels.
It is also used in gas mixtures intended for root protection. However, Hydrogen is not usable in processes involving materials such as carbon steel and aluminum.
Hydrogen is also used in plasma welding (always in a mixture) to generate the plasma itself. It is also used in significant percentages in the plasma cutting process for cutting austenitic and high-alloy steels.
-253°C
Boiling point
1,3120 J/mol
First ionization energy
0,0695
Relative density
Related gases
Acetylene for the metal fabrication industry
Acetylene is a fuel gas which, combined with Oxygen, generates a very high flame temperature and an atmosphere that can be used in braze-welding and other oxy-fuel technologies. Its instability is resolved by storing it in special cylinders that contain a porous mass that is first saturated with a solvent (Acetone or DMF). The Acetylene is than dissolved in the solvent to make it stable and safe to use.
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Argon for the metal fabrication industry
Argon is one of the most important gases for the metal fabrication industry. It is colorless, odorless, non-flammable and non-toxic, which ensures that the gas can be used on a very large scale. Argon is generally considered to be one of the best shielding agents, being present in the air. In addition, it is a very favorable gas to maintain the stability of the arc.
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Carbon Dioxide for the metal fabrication industry
Carbon Dioxide is the active gas par excellence, especially for carbon steel welding. The energy, coming from the electric arc, separates the Carbon Dioxide into Oxygen, the true active gas in the process, and Carbon. The carbon replaces the gas contained in the steel, which is lost in the welding process, leaving the chemical composition of the welded joint unchanged.
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Helium for the metal fabrication industry
Like Argon, Helium is an absolutely inert gas that does not react under any circumstances. Thanks to its ionization potential, it transfers more energy, bringing more heat into the welded joint. In addition, the low specific weight of Helium widens the protection cone, which facilitates the cooling of the welded joint.
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