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BOSS TIG 160HF
、
200HF Operating Manual
6.05 Shielding gas selection
Alloy
Shielding gas
Aluminium & alloys
Argon
Carbon steel
Argon
Stainless steel
Argon
Nickel alloy
Argon
Copper
Argon
Titanium
Argon
Table 12 Shield gas selection
6.06 TIG welding parameters for low carbon & low alloy steel pipe
Tungsten type &
diameter
Current range DC
(Amperes)
Filler rod for root pass
Joint preparation
Thoriated 2%
3/32” (2.4mm)
120— 170
Yes
Thoriated 2%
3/32” (2.4mm)
100— 160
Yes
Thoriated 2%
3/32” (2.4mm)
90— 130
No
Table 13 TIG welding parameters for low carbon & low alloy steel pipe
6.07 Welding parameters for steel
Base metal
thickness
(mm)
DC current
for mild
steel (A)
DC current
for stainless
steel (A)
Tungsten
diameter
(mm)
Filler rod
diameter (if
require) (mm)
Argon gas
flow rate
(litres/min)
Joint type
1.0
35— 45
40— 50
20— 30
25— 35
1.0
1.6
5— 7
butt/ corner
lap/ fillet
1.2
45— 55
50— 60
30— 45
35— 50
1.0
1.6
5— 7
butt/ corner
lap/ fillet
1.6
60— 70
70— 90
40— 60
50— 70
1.6
1.6
7
butt/ corner
lap/ fillet
3.2
80— 100
90— 115
65— 85
90— 110
1.6
2.4
7
butt/ corner
lap/ fillet
4.8
115— 135
140— 165
100— 125
125— 150
2.4
3.2
10
butt/ corner
lap/ fillet
6.4
160— 175
170— 200
135— 160
160— 180
3.2
4.0
10
butt/ corner
lap/ fillet
Table 14 DC TIG welding parameters
