6 BASIC WELDING GUIDE
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TIG welding is generally regarded as a specialized process that requires operator competency.
While many of the principles outlined in the previous arc welding section are applicable a
comprehensive outline of the TIG welding process is outside the scope of this Instruction Manual.
6 BASIC WELDING GUIDE
6.7 Electrode wire size selection
The choice of electrode wire size and shielding gas used depends on the following:
• Thickness of the metal to be welded
• Type of joint
• Capacity of the wire feed unit and power source
• The amount of penetration required
• The deposition rate required
• The bead profile desired
• The position of welding
• Cost of the wire
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