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What Is the
Difference Between TIG Welding & MIG Welding?
By Susan Kristoff
Tungsten inert gas (TIG) and metal inert gas
(MIG) are two types of arc welding processes.
There are a few similarities between the two
methods and many differences.
Electrode
TIG welding uses a tungsten electrode that is
not consumed during the welding process.
MIG welding uses a metal electrode that
doubles as filler material for the weld and is consumed during welding.
Shielding Gas
TIG welding primarily uses argon as a
shielding gas, with helium occasionally used.
Argon is also the primary shielding gas used
in MIG welding, but argon mixtures and carbon dioxide are often used for
different applications.
Filler Material
TIG welding requires a separate filler
material in rod or wire format because the electrode is not consumed.
MIG welding delivers the filler material via
the electrode.
Work Piece Materials
TIG welding can be applied to just about any
metal, from steel to aluminum and exotic alloys.
MIG welding was developed for nonferrous
metals, but can be applied to steel.
Difficulty
TIG welding is considered to be more difficult than MIG welding because tighter tolerances have to be maintained between the electrode, the filler rod and the work piece.
Susan
Kristoff has been writing engineering
content for 13 years. Her articles have appeared on eHow.com, Suite101, her
personal websites, and the websites of many ghostwriting clients. Kristoff's
expertise includes design, structures, sensors, data acquisition, and
fabrication.
https://sciencing.com/difference-tig-welding-mig-welding-5616007.html
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