Strata ADVANCEMULTI205P, Руководство по эксплуатации

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4.3 Tungsten Electrodes
Tungsten is a rare metallic element
used for manufacturing TIG welding
electrodes. The TIG process relies on
tungsten’s hardness and high-temperature
resistance to carry the welding current to
the arc. Tungsten has the highest melting
point of any metal, 3,410 degrees
Celsius. Tungsten electrodes are non-
consumable and come in a variety of
sizes, they are made from pure tungsten
or an alloy of tungsten and other rare
earth elements. Choosing the correct
tungsten depends on the material being
welded, amps required and whether you
are using AC or DC welding current.
Tungsten electrodes are colour-coded at the
end for easy identification. Below are the most
commonly used tungsten electrodes found in
the New Zealand and Australian market.
Thoriated (Colour Code: Red)
Thoriated tungsten electrodes (AWS
classification EWTh-2) contain a minimum of
97.30 percent tungsten and 1.70 to 2.20percent
thorium and are called 2 percent thoriated.
They are the most commonly used electrodes
today and are preferred for their longevity and
ease of use.
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