Why is TIG called argon welding?

Because the arc and weld pool are shielded by argon gas. In Indian workshops TIG welding is commonly called argon welding.

Can TIG weld aluminium?

Yes, with an AC TIG machine. The AC current breaks up the aluminium oxide skin so the metal can fuse.

Is TIG stronger than MIG?

Not by nature: both can give full-strength welds. TIG gives more control and cleaner welds on thin and critical joints; MIG is faster on thicker fabrication.

TIG welding machine: argon welding, uses, AC and DC

A TIG welding machine joins metals with an arc from a tungsten electrode that does not melt, shielded by argon gas. Filler wire is added by hand. It gives clean, precise, spatter-free welds, so it is used for stainless steel, aluminium, thin sheet, pipes and repair of dies and moulds.

Quick facts

Process: Gas tungsten arc welding (GTAW)
Shielding gas: Argon (sometimes argon-helium)
Current: DC for steel and stainless; AC for aluminium
Thickness: From about 0.5 mm (0.0197 inch); thick parts need many passes
Weld quality: Clean, precise, no spatter
Speed: Slower than MIG

AC or DC?

Current	Metals	Why
DC (electrode negative)	Mild steel, stainless steel, copper, titanium	Deep, stable arc
AC	Aluminium and magnesium	Cleans the oxide layer while welding

TIG or MIG?

	TIG	MIG
Filler	Added by hand	Fed through the gun
Speed	Slow	Fast
Appearance	Neat, precise	Good, some spatter
Best for	Thin sheet, stainless, aluminium, pipes, die repair	Fabrication, structures, thicker steel

Typical uses

Stainless steel tanks, pipes and food equipment
Aluminium frames and parts
Root passes on pressure pipes
Repair welding of dies and moulds (with matching filler)
Thin sheet where distortion must be low

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Questions

Why is TIG called argon welding?: Because the arc and weld pool are shielded by argon gas. In Indian workshops TIG welding is commonly called argon welding.
Can TIG weld aluminium?: Yes, with an AC TIG machine. The AC current breaks up the aluminium oxide skin so the metal can fuse.
Is TIG stronger than MIG?: Not by nature: both can give full-strength welds. TIG gives more control and cleaner welds on thin and critical joints; MIG is faster on thicker fabrication.

The figures on this page are typical values for guidance, written by Diemeco from standard engineering practice. They are not a specification: confirm grades and properties with the relevant standard or the supplier's mill test certificate, and tolerances with your workshop. Last checked 16 October 2026.