Current Category Tig welders On Sale Tig welding machines Tig welding accessories Tig welding consumables Tig torches & parts
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Brief overview
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Brief overview
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DC Tig Welder Plasma Cutter (Multi-164) Portable inverter welder Tig Stick Plasma
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DC Tig Welder (TIG200P) Portable inverter welder Tig Stick |
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Brief overview
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AC DC Tig Welder Low Cost Economical Entry Level Welding Machine
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AC DC Tig Welder (Alupulse 200) |
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AC DC Tig Welder (Alupulse 200) Includes Foot Control and Argon Gas Regulator |
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AC DC Tig Welder & Plasma Cutter (Alusync) |
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AC DC Tig Welder & Plasma Cutter (Alusync) Includes Foot Control and Argon Gas Regulator
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AC DC Tig Welder (Alupulse 315DX) Includes Foot Control and Argon Gas Regulator |
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Current Category Tig welders On Sale
Tig Welders Tig Welding Machines
Selecting the correct tungsten size and current
Tungsten size is determined by the thickness of the metal to be welded and the welding current used, a rough rule of thumb is 30 to 40 amps per millimetre of metal thickness, Typical current ranges are: 1.6mm, 30 to 120 amps, 2.4mm, 80 to 240 amps, 3.2mm, 200 to 380 amps. For more information see Tungsten Electrodes
The welding torch
TIG torches are fairly simple items, but knowing what the individual components are called can save time when buying spares, and correct assembly can prevent simple operating problems, See TIG Torch
Gas flow
Gas flow is set by adjusting the cylinder regulator, flow rates will vary slightly depending on working conditions, joint type and ceramic cup size, but would not be expected to be less than 4 litres per minute, and may rise to as much as 12 litres per minute, See Argon Gas Regulators
Shielding Gases
Gas Choice
Pure Argon is the most common shielding gas for Tig welding, it will cope with all common materials, for some specialised and automated processes Helium and Argon Helium mixes are sometimes used. Argon mix gases and CO2 as used in Mig welding cannot be used with TIG, the CO2 in the mix is an active gas and will destroy the tungsten electrode as soon as an arc is struck.
TIG Welding Steel and Stainless Steel
Welding Machines
A TIG welder with an DC output is required to weld Stainless and mild steels, these may be transformer based, or Inverter based, most modern DC inverter Arc welding sets can be used as a basic TIG welder
Electrodes For DC
Thoriated electrodes are the traditional choice for welding mild and stainless steel, because of a slight radiation risk from the dust produced by grinding they are increasingly being replaced by Ceriated or Lanthanated tungstens,
Preparing the tungsten
Tungsten electrodes used on DC need to be ground to a point, the length of the taper is usually about 2 to 3 times the diameter of the electrode, grinding should be carried out so that grinding marks are length-ways, and not radial.
TIG Welding Aluminium
TIG Welders
A TIG welder with an AC output is required to weld aluminium and its alloys, AC TIG welders have either a high frequency generator on board or clever electronics to initiate and maintain the arc, cheap AC buzzbox welders are not suitable.
Electrodes for Aluminium
Traditionally, Zirconiated electrodes are used for Aluminium, there are also all purpose electrodes, such as Ceriated, and lanthanated, which can be used both with Aluminium, and mild and stainless steels. In AC welding the tip of the electrode will form a ball, up to and including 1.6mm will need no preparation, with electrodes of 2.4mm and above a very shallow point may be ground to assist with the formation of the ball, the length of the taper being about one third of the electrode diameter. Zirconiated Tungsten
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