Tweco 160 S Arcmaster - Manual (Page 32)

ARCMASTER ® 160 S
March 31, 2006 7-2
7.05 Shielding Gas Selection
Alloy Shielding Gas
Aluminium & alloys Welding Argon
Carbon Steel Welding Argon
Stainless Steel Welding Argon
Nickel Alloy Welding Argon
Copper Welding Argon
Titanium Welding Argon
Table 7 – 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 8– TIG welding parameters for low carbon & low alloy steel pipe
7.07 Welding Parameters for Steel
Base Metal
Thickness
DC Current for
Mild Steel
DC Current
for Stainless
Steel
Tungsten
Electrode
Diameter
Filler Rod
Diameter
(if required)
Argon Gas
Flow Rate
Liters/min Joint Type
0.040”
1.0mm
35-45 20-30 0.040”
1.0mm
1/16”
1.6mm
5-7
Butt/Corner
40-50 25-35 Lap/ Fillet
0.045”
1.2mm
45-55 30-45 0.040”
1.0mm
1/16”
1.6mm
5-7
Butt/Corner
50-60 35-50 Lap/ Fillet
1/16”
1.6mm
60-70 40-60 1/16”
1.6mm
1/16”
1.6mm
7
Butt/Corner
70-90 50-70 Lap/ Fillet
1/8”
3.2mm
80-100 65-85 1/16”
1.6mm
3/32”
2.4mm
7
Butt/Corner
90-115 90-110 Lap/ Fillet
3/16”
4.8mm
115-135 100-125 3/32”
2.4mm
1/8”
3.2mm
10
Butt/Corner
140-165 125-150 Lap/ Fillet
¼”
6.4mm
160-175 135-160 1/8”
3.2mm
5/32”
4.0mm
10
Butt/Corner
170-200 160-180 Lap/ Fillet
Table 9 – DC TIG welding parameters