Guide For Selecting Filler Wire Diameter; Shielding Gas Selection; Tig Welding Parameters For Low Carbon & Low Alloy Steel Pipe - Thermal Arc ARCMASTER 300 MST Operating Manual

5.04 Guide for Selecting Filler Wire Diameter

Filler Wire Diameter
1/16" (1.6 mm)
3/32" (2.4 mm)
1/8" (3.2 mm)
3/16" (4.8 mm)
The filler wire diameter specified in the above table is a guide only, other diameter wires may be
used according to the welding application.

5.05 Shielding Gas Selection

Alloy
Aluminium & alloys
Carbon Steel
Stainless Steel
Nickel Alloy
Copper
Titanium
5.06 TIG Welding Parameters for Low Carbon & Low Alloy Steel Pipe
Electrode Type &
Diameter
Thoriated 2%
3/32" (2.4 mm)
Thoriated 2%
3/32" (2.4 mm)
Thoriated 2%
3/32" (2.4 mm)
Table 11 – TIG Welding Parameters for Low Carbon & Low Alloy Steel Pipe
AC Current Range
(Amps)
30-95
125-160
180-240
220-320
Table 9 – Filler Wire Selection Guide
NOTE 8
Argoshield is a registered trademark of BOC Gases Limited.
Welding Argon, Argoshield 80T, 81T
Welding Argon
Welding Argon, Argoshield 71T, 80T, 81T
Welding Argon, Argoshield 71T
Welding Argon, Argoshield 81T
Welding Argon, Argoshield 80T, 81T
Table 10 – Shielding Gas Selection
Current Range DC
Amperes
120 - 170
100 - 160
90 - 130
31
DC Current Range
100 - 165
Shielding Gas
Filler Rod for Joint Preparation
Root Pass
Yes
Yes
No
(Amps)
20 - 90
65 - 115
200-350