TIG welding (Tungsten Inert Gas) for stainless steel
The process or TIG welding is the procedure that is used for welding stainless steel by Stainless
Steel Pipe manufacturer. In this process, the electric arc is going to be established between the
base metal and a non-consumable Tungsten electrode, under a protective atmosphere. The
atmosphere has been generated by the inert gas, which is usually argon.
Argon is used to protect the molten metal from welding from the surrounding air. Also, if
necessary, we can add filler metal in the form of a rod or wire inserted into the arc. You can add
it automatically or manually to melt it. The drops are spilt into the fusion bath.
This TIG welding process forms high-quality beads, without the presence of slag when using
non-consumable electrodes without coating or projections. This makes it used for highly
responsible stainless steel welds, where it is essential to achieve exquisite quality welding.
In addition to highly responsible welds, it is also widely used in thin pieces, approximately up to
6 mm. Since in welds of pieces that have more than these 6 or 7 mm it will not be economical. If
you have parts greater than this thickness, use submerged arc welding better.
Advantages of TIG welding for stainless steel
Some of the advantages of this type of procedure are the following:
• It usually does not generate slag in the bead, which will reduce cleaning tasks after
welding of Stainless Steel Tube.
• This process can be used in any position of the weld. This allows it to be highly
recommended for welding pipes and tubes.
• This type of welding does not generate any spatter around the bead.
• It does not affect the chemical composition and properties of the base metal being used
during the welding process.
MIG (Metal Inert Gas) welding for stainless steel
This MIG procedure and the MAG (Metal Active Gas) procedure are used to achieve the gaseous
protection of inert gas. It is done by establishing an electric arc between a consumable
electrode, and the base metal or part to be welded.
For this type of weld ideal for stainless steel, both the weld and the arc will protect the air from
the atmosphere. The action of a gaseous envelope is composed of inert gases, highlighting argon
and/or helium as the most widely used.
To obtain better arc action and better wettability in the weld, small amounts of active gases,
such as carbon dioxide, oxygen and hydrogen, are sometimes used.
The parts/equipment of the process:
1.nozzle
2.-Contact tube
3.-Protection gas
4.-Rod (solid or tubular)
5.-Flux in case of the tubular rod
6.-Free length of rod (stik-out)
7.-Transfer of the contributed metal
8.-Soldering bath and liquid slag
9.-Solid slag protecting the fusion bath
10.-Deposited metal
11.-Solidified slag
12.-Slag-free solidified welding metal
Advantages of TIG welding for stainless steel
Stainless Steel Welded Pipe manufacturer in India find the following advantages in MIG
welding, compared to other welds:
• It will allow us higher welding speeds.
• In the case of large productions, it allows easy automation of the process.
• It is a procedure that offers a very good transfer of the filler metal through the arch.
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