4 guide for selecting filler wire diameter, 5 shielding gas selection, Transmig 400 i – Tweco 400i Transmig User 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