TIG Welding

What is TIG welding (or GTAW welding)?

TIG Welding stands for Tungsten Inert Gas welding. Another name you may come across is GTAW welding, which is an abbreviation for Gas Tungsten Arc Welding. When you want to join two pieces of metal together, TIG is the best option among many types of welding for precise high-quality welds.

This is how TIG welding works:

During the procedure of TIG welding, a scalding arc is comprised between a non-consumable tungsten electrode that runs through a column of gas from the torch and the metal workpiece. The high frequency generator provides a small flash, striking the welding arc and forming the conductive passage of electricity flow through the gas column.

Moving the ignited arc in a small circular motion creates a welding puddle. In case an edge, corner or butt joint suffices no filler metal is needed. These welds are called an autogenous or fusion welds. If required, a filler rod manufactured of a metal with a low melting temperature can be added manually to the welded puddle for a stronger and thicker weld.

TIG Welding

As this type of welding is different from MIG welding or stick welding, it is important to use appropriate welding supplies and acquire some welding skills. Although the equipment requires a higher budget, the advantage is that, thanks to the protective atmosphere of the inert gas, the welds used with TIG welding are clean and aesthethical.

TIG welding supplies include the following elements:

  • a welding machine (consider a machine that is especially designed for TIG-welding with a DCSP or AC current, as they come with a high-frequency unit which is needed for a stable arc)
  • a tungsten electrode
  • a torch or an electrode holder
  • shielding gas supply (argon is commonly used)
  • filler metal rod
  • personal safety equipment

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