All gases

Helium for welding

A rare but special gas.

A great help in welding processes

Rarely used pure, helium is an inert gas, very light with high ionisation potential which allows to work with extreme welding parameters.

Normally used in mixture with argon and other active gases, it increases the heat input on the process allowing to increase the productivity and the protection of the welding bath.

Suitable for all electric arc welding processes (TIG/MIG/MAG) but also plasma and laser, in particular on materials such as aluminium and copper that quickly disperse heat.

-269 °C

Boiling point

Close to absolute zero.

2,3720 J/mol

First ionisation energy

High ionisation energy = high efficient
welding process.

0,138

Relative density

Very light, it enlarge protection on melting pool.

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.

Helium for welding

Low density inert gas. It is not usually used pure. It has a high ionisation potential, which on the one hand provides low stability and costly ignitions, and on the other hand, the advantage of being able to work with extreme parameters. This, together with its high thermal conductivity, provides highly energetic arcs and very fluid baths, which increases the welding speed.

Nitrogen for welding

Inert gas at room temperature but reactive at arc temperature. It is used in small percentages providing good stability, increasing thermal input and fluidity and increasing speed. Thicker penetrations than argon. Widely used alone or mixed with hydrogen as a back-up gas. Assist gas in laser cutting.

Oxygen for welding

Oxidising gas par excellence, 1.11 times heavier than air. Its reaction with carbon is the basis of the cutting process of carbon steels. In welding it is used in small percentages generating surface oxides in the droplets and the bath giving a high fluidity, increasing the speed and improving the finish. High stability and conical penetrations.