TIG Welding Process

Tig Welding Overview

The Tungsten Inert Gas (TIG welding) process uses the heat generated by an electric arc struck between a non-consumable tungsten electrode and the work piece to fuse metal in the joint area and produce a molten weld pool. The arc area is shrouded in an inert or reducing gas shield to protect the weld pool and the non-consumable electrode. The process may be operated autogenously (without filler), or filler may be added by feeding a consumable wire or rod into the established weld pool.
• The addition of filler is optional
• Only inert or reducing gases can be used as the shielding gas
• TIG welding is a high-quality, versatile and commonly-used process
• TIG is suitable for welding ferrous and non-ferrous materials
• The TIG welding process can be run on DC-, DC+ or AC
• The TIG welding process is capable of producing very high-quality welds in a wide range of materials and in thicknesses up to about 8 or 10mm. It is particularly suited to welding of sheet material and for putting in the root run of pipe butt welds.
• The process tends to be very clean, producing little particulate fume, although it is capable of generating ozone in appreciable amounts and is not regarded as a high-productivity process.