Tweco 300 TS Arcmaster(Feb2006) - Manual (Page 40)

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7.04 Guide for Selecting Filler Wire Diameter
Filler Wire Diameter DC Current Range
(Amps)
1/16” (1.6 mm) 20 - 90
3/32” (2.4 mm) 65 - 115
1/8” (3.2 mm) 100 - 165
3/16” (4.8 mm) 200-350
Table 9 – Filler Wire Selection Guide
NOTE 7
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 Argon
Carbon Steel Argon
Stainless Steel Argon
Nickel Alloy Argon
Copper Argon
Titanium Argon
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