Tweco 300 TS Arcmaster(April2006) User Manual
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7.04 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
Table 9 – Filler Wire Selection Guide
NOTE 6
The filler wire diameter specified in Table 9 is a guide only. Other diameter wires may
be used according to the welding application.
7.05 Shielding Gas Selection
Alloy
Shielding Gas
Aluminium & alloys
Welding Argon, Argoshield 80T, 81T
Carbon Steel
Welding Argon
Stainless Steel
Welding Argon, Argoshield 71T, 80T, 81T
Nickel Alloy
Welding Argon, Argoshield 71T
Copper
Welding Argon, Argoshield 81T
Titanium
Welding Argon, Argoshield 80T, 81T
Table 10 – Shielding Gas Selection
7.06 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
Table 11 – TIG Welding Parameters for Low Carbon & Low Alloy Steel Pipe