Shielding Gas Selection; Tig Welding Parameters For Low Carbon & Low Alloy Steel Pipe; Welding Parameters For Steel - Boss ARC 140 Operating Manual

6.05

Shielding gas selection

6.06 TIG welding parameters for low carbon & low alloy steel pipe
Tungsten type &
diameter
Thoriated 2%
3/32" (2.4mm)
Thoriated 2%
3/32" (2.4mm)
Thoriated 2%
3/32" (2.4mm)
Table 11 TIG welding parameters for low carbon & low alloy steel pipe
6.07

Welding parameters for steel

Base metal DC current
thickness for mild
(mm) steel (A)
35— 45
1.0
40— 50
45— 55
1.2
50— 60
60— 70
1.6
70— 90
80— 100
3.2
90— 115
115— 135
4.8
140— 165
160— 175
6.4
170— 200
BOSS ARC 140¡¢ 160 Operating Manual
Alloy
Aluminium & alloys
Carbon steel
Stainless steel
Nickel alloy
Copper
Titanium
Table 10 Shield gas selection
Current range DC
(Amperes)
120— 170
100— 160
90— 130
DC current Tungsten
for stainless diameter
steel (A) (mm)
20— 30
1.0
25— 35
30— 45
1.0
35— 50
40— 60
1.6
50— 70
65— 85
1.6
90— 110
100— 125
2.4
125— 150
135— 160
3.2
160— 180
Table 12 DC TIG welding parameters
- 16 -
Shielding gas
Argon
Argon
Argon
Argon
Argon
Argon
Filler rod for root pass
Yes
Yes
No
Filler rod Argon gas
diameter (if
require) (mm) (litres/min)
1.6
1.6
1.6
2.4
3.2
4.0
Joint preparation
flow rate Joint type
butt/ corner
5— 7
lap/ fillet
butt/ corner
5— 7
lap/ fillet
butt/ corner
7
lap/ fillet
butt/ corner
7
lap/ fillet
butt/ corner
10
lap/ fillet
butt/ corner
10
lap/ fillet