30
Metal
gaUge
joint
type
tUngsten
siZe
filler rod
siZe
cUp
siZe
shield gas floW
Welding
aMperes
travel
speed
type
cfh
(l/Mn)
psi
1/16
(1.6mm)
BUtt
1/16
(1.6mm)
1/16 (1.6mm)
4, 5, 6
argon
15 (7)
20
60-80
12
(307.2mm)
fillet
70-90
10
(256mm)
1/8
(3.2mm)
BUtt
3/32
(2.4mm)
3/32 (2.4mm)
1/8 (3.2mm)
6, 7
argon
17 (8)
20
125-145
12
(307.2mm)
fillet
3/32 (2.4mm)
1/16 (1.6mm)
140-160
10
(256mm)
3/16
(4.8mm)
BUtt
1/8 (3.2mm)
1/8 (3.2mm)
7, 8
argon/
heliUM
21 (10)
20
195-220
11
(258.6mm)
fillet
210-240
9
(230.4mm)
1/4
(6.4mm)
BUtt
3/16
(4.8mm)
1/8 (3.2mm)
8, 10
argon/
heliUM
25 (12)
20
260-300
10
(256mm)
fillet
280-320
8
(204.8mm)
Welding alUMinUM
Welding MagnesiUM
the use of tig welding for aluminum has
many advantages for both manual and
automatic processes. filler metal can be
either wire or rod and should be compatible
with the base alloy. filler metal must be dry,
free of oxides, grease, or other foreign matter.
if filler metal becomes damp, heat for 2 hours
at 250°f (121°c) before using. although achf
is recommended, dcrp has been successful
up to 3/32” (2.4mm), dcsp with helium shield
gas is successful in mechanized applications.
Metal
gaUge
joint
type
tUngsten
siZe
filler rod
siZe
cUp
siZe
shield gas floW
Welding
aMperes
travel
speed
type
cfh
(l/Mn)
psi
1/16
(1.6mm)
BUtt
1/16
(1.6mm)
3/32 (2.4mm)
1/8 (3.2mm)
5, 6
argon
13 (5)
15
60
20
(512mm)
fillet
60
1/8
(3.2mm)
BUtt
3/32
(2.4mm)
1/8 (3.2mm)
5/32 (4.0mm)
7, 8
argon
19 (9)
15
115
17
(435.2mm)
fillet
115
1/4
(6.4mm)
BUtt
3/16
(4.8mm)
5/32 (4.0mm)
8
argon
25 (12)
15
100-130
22
(563.2mm)
fillet
110-135
20
(512mm)
1/2
(12.8mm)
BUtt
1/4 (6.4mm)
3/16 (4.8mm)
10
argon
35 (17)
15
260
10
(256mm)
fillet
Magnesium was one of the first metals to
be welded commercially by tig. Magnesium
alloys are in three groups, they are: (1)
aluminum-zinc-magnesium, (2) aluminum-
magnesium, and (3) maganese-magnesium.
since magnesium absorbs a number of
harmful ingredients and oxiodize rapidly
when subjected to welding heat, tig welding
in an inert gas atmosphere is distinctly
advantageous. the welding of magnesium
is similar, in many respects, to the welding
of aluminum. Magnesium requires a positive
pressure of argon as a backup on the root
side of the weld.
Metal
gaUge
joint
type
tUngsten
siZe
filler rod
siZe
cUp
siZe
shield gas floW
Welding
aMperes
travel
speed
type
cfh
(l/Mn)
psi
1/16
(1.6mm)
BUtt
1/16
(1.6mm)
none
4, 5, 6
argon
15 (7)
20
90-110
10 (256mm)
fillet
110-150
8
(204.8mm)
1/8
(3.2mm)
BUtt
3/32
(2.4mm)
1/16
(1.6mm)
5, 6, 7
argon
15 (7)
20
190-220
9
(230.4mm)
fillet
210-250
7
(179.2mm)
3/16
(4.8mm)
BUtt
3/32
(2.4mm)
1/8 (3.2mm)
6, 7, 8
argon
20 (10)
20
220-250
8
(204.8mm)
fillet
240-280
7
(179.2mm)
1/4
(6.4mm)
BUtt
1/8 (3.2mm)
1/8 (3.2mm)
8, 10
argon
30 (15)
20
275-310
8
(204.8mm)
fillet
290-340
7
(179.2mm)
Welding titaniUM
small amounts of impurities, particularly
oxygen and nitrogen, cause embrittlement
of molten or hot titanium when above 500°f
(260°c). the molten weld metal in the
heat-affected zones must be shielded by
a protective blanket of inert gas. titanium
requires a strong, positive pressure of argon
or helium as a backup on the root side of
the weld, as well as long, trailing, protective
tail of argon gas to protect the metal while
cooling. purge chambers and trailing shields
are available from ck Worldwide to assist in
providing quality results.
alUMinUM
titaniUM
MagnesiUM
