Jasic MIG SERIES - TIG Welding Consumables; TIG Welding Arc Starting - Lift TIG

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GUIDE TO TIG WELDING
Before starng any welding acvity ensure that you have suitable eye protecon and
protecve clothing. Also take the necessary steps to protect any persons within the welding
area.
TIG welding consumables
The consumables of the TIG welding process are ller wires and shield gas.
Filler wires
Filler wires come in many dierent material types
and usually as cut lengths, unless some automated
feeding is required where it will be in reel form.
Filler wire is generally fed in by hand.
Always consult the manufacturer’s data and
welding requirements.
Gases
Shielding gas is required when welding to keep the weld pool free of oxygen. Whether you are welding
mild steel or stainless steel the most commonly used shielding gas used in TIG welding is argon, for more
specialised applicaons an argon helium mix or pure helium maybe used.
TIG welding arc starng - Li TIG (li arc)
Not to be confused with scratch start, this arc starng method allows the tungsten to be in direct contact
with the work piece rst but with minimal current so as not to leave a tungsten deposit when the
tungsten is lied and an arc is established.
With li TIG start the open circuit voltage (OCV) of the welder folds back to a very low voltage output
when the unit senses it has made connuity with the work piece. Once the torch is lied the unit
increases output as the tungsten leaves the surface. This creates lile contaminaon and preserves the
point on the tungsten although this is sll not a 100% clean process. The tungsten can sll get
contaminated but li TIG is sll a much beer opon than scratch starng for mild and stainless steel
although these methods of arc starng are not a good opon when welding aluminium.
Filler Wire Diameter DC Current Range (Amps)
1.0mm 20-90
2.4mm 65-115
3.2mm 100-165
4.8mm 200-350
Filler Wire Selecon Guide