Tweco 300 S Arcmaster - Manual (Page 34)

ARCMASTER ® 300 S
March 31, 2006 7-2
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 7 – Shielding gas selection
7.06 TIG Welding Parameters for Low Carbon & Low Alloy Steel Pipe
Current Range DC
Amperes
Thoriated 2%
3/32” (2.4 mm)
Thoriated 2%
3/32” (2.4 mm)
Thoriated 2%
3/32” (2.4 mm)
Electrode Type &
Diameter
Filler Rod for Root
Pass
Joint Preparation
120 - 170 Yes
100 - 160 Yes
90 - 130 No
Table 8 – TIG welding parameters for low carbon & low alloy steel pipe
7.07 Welding Parameters for Steel
Filler Rod
Diameter
(if required) Joint Type
0.040” 35-45 20-30 0.040” 1/16” Butt/Corner
1.0mm 40-50 25-35 1.0mm 1.6mm Lap/ Fillet
0.045” 45-55 30-45 0.040” 1/16” Butt/Corner
1.2mm 50-60 35-50 1.0mm 1.6mm Lap/ Fillet
1/16” 60-70 40-60 1/16” 1/16” Butt/Corner
1.6mm 70-90 50-70 1.6mm 1.6mm Lap/ Fillet
1/8” 80-100 65-85 1/16” 3/32” Butt/Corner
3.2mm 90-115 90-110 1.6mm 2.4mm Lap/ Fillet
3/16” 115-135 100-125 3/32” 1/8” Butt/Corner
4.8mm 140-165 125-150 2.4mm 3.2mm Lap/ Fillet
¼” 160-175 135-160 1/8” 5/32” Butt/Corner
6.4mm 170-200 160-180 3.2mm 4.0mm Lap/ Fillet
7
10
10
Argon Gas
Flow Rate
Liters/min
5-7
5-7
7
DC Current
for Mild
Steel
DC Current for
Stainless
Steel
Tungsten
Electrode
Diameter
Base Metal
Thickness
Table 9 – DC TIG welding parameters