Gas Tungsten Arc Welding (GTAW), commonly known as Tungsten Inert Gas (TIG) welding is the preferred choice of many professional welders and hobbyists. The process grants the operator greater control over the weld but also requires a high degree of hand-eye coordination compared to other welding methods. TIG welding provides the most precise and controllable form of welding, resulting in stronger and higher quality welds.
Hobbyists and enthusiasts who weld occasionally usually hire TIG welders. Businesses that use other welding methods also hire these machines for special projects or temporary requirements. One can easily find TIG welders in Perth at hardware shops and stores stocking welding equipment and supplies. Many online stores also offer TIG welders for hire.
Certain things need to be kept in mind when hiring TIG welders. They are briefly discussed below.
- Nature of Job: The nature of work and accompanying requirements determine the type of welder required. High precision professional work requires sophisticated-complex TIG welders while hobbyists do fine with basic machines. Also, a combination welder which offers both constant voltage and constant current modes may be required if you intend to use different types of processes like MIG or MMA aside from TIG welding.
- AC or DC Power: For welding different metals, an AC/DC TIG welder makes more sense . The metal and thickness determine the type of power required. For softer metals like aluminium and magnesium, AC output is appropriate. On the other hand, DC is preferred for harder ferrous materials including iron and steel. If one has to weld a variety of metals, a TIG welder supporting both AC and DC output will be required.
- Duty Cycle: The welder duty cycle indicates how long one can weld without overheating and damaging the welder. A rating of 40-60% at maximum output is sufficient for most handheld TIG applications.
- Weld Thickness: Depending on the thickness of the weld required, one may require different amperage from the welder. As a rule, 30 amps for every millimetre of aluminium thickness and 25 amps per millimetre of mild steel thickness is required. For thin sheets that require less than 10 amps AC, rectification may be a problem. To avoid this, a welder should have high-frequency AC or square wave output.