Tweco 400i Transmig - Manual (Page 36)

TRANSMIG 400 i
5-2 July 18, 2008
5.01.4 Guide for Selecting Filler Wire Diameter
Filler Wire Diameter AC Current Range
(Amps)
DC Current Range
(Amps)
1/16” (1.6 mm) 30 - 95 20 - 90
3/32” (2.4 mm) 125 - 160 65 - 115
1/8” (3.2 mm) 180 - 240 100 - 165
3/16” (4.8 mm) 220 - 320 200 - 350
NOTE 1
The filler wire diameter specified in the above table is a guide only, other diameter wires may be
used according to the welding application.
5.01.5 Shielding Gas Selection
Alloy Shielding Gas
Aluminum & alloys Welding Argon
Carbon Steel Welding Argon
Stainless Steel Welding Argon
Copper Welding Argon
5.01.6 TIG Welding Parameters for Low Carbon & Low Alloy Steel Pipe
Electrode Type &
Diameter
Current Range DC
Amperes
Filler Rod for
Root Pass
Joint Preparation
Thoriated 2%
3/32” (2.4 mm)
120 - 170 Yes
Thoriated 2%
3/32” (2.4 mm)
100 - 160 Yes
Thoriated 2%
3/32” (2.4 mm)
90 - 130 No