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Please note that we continually improve our products, we reserve the right to make changes without prior notice and are not liable for any damage caused by improper use of our products.
JA - Forming Info
In addition to the desired effect, namely the melting of the material, the welding heat can also have undesirable effects. One of these is the formation of tarnish colours in stainless steel. Tarnish colours are an oxidation product and significantly reduce the corrosion resistance of stainless steel.
To ensure that stainless steel retains its properties after welding, it must be protected from oxidation during welding. On the weld seam side this is done by the shielding gas, while additional measures are necessary on the root side. If the oxygen responsible for oxidation is displaced by another shielding gas, this is called "Forming".
Various gases and gas mixtures can be used for forming. The choice of gas mainly depends on the material to be protected, but also on other criteria.
Argon, universally applicable for all materials-fusion
Argon-hydrogen mixtures, for austenitic stainless steels
Nitrogen, for austenitic stainless steels and duplex steels
Forming gases (nitrogen-hydrogen mixture) for austenitic stainless steels
The addition of hydrogen, due to its strongly reducing effect, provides improved protection against oxidation, even under unfavorable conditions. However, hydrogen-containing gases are not suitable for all materials!
...to ensure the welding quality in pipeline, container, plant and steel construction.
Our systems for gas shielded welding have proven themselves thousands of times in practice.
All advantages at a glance:
• suitable for all welding joints forms
• suitable for all welding processes
• suitable for all materials
• suitable for all pipes from 9 mm ID, large pipes and vessels
• Special devices according to customer requirements
• High temperature resistant
• the shielding gas consumption is significantly reduced by two factors
1) The effectively designed rinsing chambers reduce the volume to be fed to a minimum
2) The flushing times can be shortened to 1 to 3 minutes
• some shielding gas systems can be dismantled and removed through the smallest openings even after the weld is completed
• the compact system also includes a measurement option for residual oxygen determination
and monitoring using a residual oxygen meter. Extensive documentation options via
Interface and Software on a PC
• suitable for workshop and assembly use