TRANSTIG 220AC/DC AND 300AC/DC POWER SOURCE
BASIC WELDING GUIDE
4-14
Manual 0-5293
4.03 TIG (GTAW) Basic Welding Technique
Gas Tungsten Arc Welding (GTAW) or TIG (Tungsten Inert Gas) as it is commonly referred to, is a welding
process in which fusion is produced by an electric arc that is established between a single tungsten (non-
consumable) electrode and the work piece. Shielding is obtained from a welding grade shielding gas or welding
grade shielding gas mixture which is generally Argon based. A filler metal may also be added manually in some
circumstances depending on the welding application.
Welds Made With or Without
Addition of Filler Metal
Work Piece
Can Be Any Commercial
Metal
Gas Cup
Either Ceramic,
High-lmpact or
Water Cooled
Metal
Inert Gas
Shields Electrode
and Weld Puddle
Tungsten Electrode
Non-Consumable
Art # A-09658_AC
Figure 4-28: TIG Welding Application Shot
Tungsten Electrode Current Ranges
Electrode Diameter
DC Current (Amps)
0.040” (1.0mm)
30-60
1/16” (1.6mm)
60-115
3/32” (2.4mm)
100-165
1/8” (3.2mm)
135-200
5/32” (4.0mm)
190-280
3/16” (4.8mm)
250-340
Table 4-3: Current Ranges for Various Tungsten Electrode Sizes
Guide for Selecting Filler Wire Diameter
Filler Wire Diameter DC Current Range (Amps)
1/16” (1.6mm)
20-90
3/32” (2.4mm)
65-115
1/8” (3.2mm)
100-165
3/16” (4.8mm)
200-350
Table 4-4: Filler Wire Selection Guide
Summary of Contents for A-12030
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