Gas Selection For Gas Metal Arc Welding - Thermal Arc Fabricator 140 Service Manual

FABRICATOR 140, 180

4.15 Gas Selection for Gas Metal Arc Welding

Base Plate
Metal Type
Thickness
Carbon Greater than
Steel 22 gauge
(.030")
Greater than
22 gauge
(.030")
Greater than
22 gauge
(.030")
Greater than
10 gauge (1/8")
Low Alloy Greater than
and 22 gauge
High Alloy (.030")
Steel
Greater than
22 gauge
(.030")
Greater than
3/32"
Greater than
14 gauge
(.075")
Stainless Greater than
Steel 22 gauge
(.030")
Greater than
3/32"
Aluminum Greater than
18 gauge
(.045")
Note 1: Contact your Filler Metal Supplier for recommended filler metal for the base metal to be welded.
Manual 0-4992
Filler
Transfer Suggested
Metal
Mode Shielding Gas
ER70S-X Short 100% CO
Circuit
ER70S-X Short 75% Argon
Circuit 25% CO
ER70S-X Short 92% Argon
Circuit 8% CO
ER70S-X Spray 92% Argon
Transfer 8% CO
See Note 1 Short 75% Argon
Circuit 25% CO
Globular
See Note 1 Short 92% Argon
Circuit 8% CO
See Note 1 Spray 92% Argon
transfer 8% CO
See Note 1 Short 98% Argon
Circuit 2% CO
ER308-X Short 90% Helium
ER309-X Circuit 7.5% Argon
ER316-X 2.5% CO
81% Argon
18% Helium
1 % CO
ER308-X Spray 90% Helium
ER309-X Transfer 7.5% Argon
ER316-X 2.5% CO
81% Argon
18% Helium
1 % CO
ER4043 Spray Argon
ER5356 Transfer
Welding
Positions
All Position High welding speeds. Good
2
Welding penetration and pool control.
All Position Suitable for high-current and high-
Welding speed welding.
2
All Position Higher deposition rates without melt-
Welding through. Minimum distortion and
2
spatter. Good pool control for out-of-
position welding.
Flat & HV Good arc stability, weld soundness,
Fillet and increasing width of fusion.
2
All Position High welding speeds. Good
Welding penetration and pool control.
2
Applicable for out-of-position welds.
Suitable for high-current and high-
speed welding.
All Position Good coalescence and bead contour.
Welding Good mechanical properties.
2
Flat & HV Reduces undercutting. Higher
Fillet deposition rates and improved bead
2
wetting. Deep penetration and good
mechanical properties.
All Position Good control of melt-through and
Welding distortion. Used also for spray arc
2
welding. Pool fluidity sometimes
sluggish depending on the base alloy.
All Position Low CO
Welding minimizes carbon pickup, which can
cause intergranular corrosion with
2
or some alloys. Helium improves wetting
action and contour. CO
above 5% should be used with caution
on some alloys.
2
Flat & HV Good arc stability. Produces a fluid
Fillet but controllable weld pool, good
coalescence, and bead contour.
2
or Minimizes undercutting on heavier
thickness.
2
All Position Excellent cleaning action. Provides
Welding more stable arc than helium-rich
mixtures.
4-14
OPERATION
Comments
percentages in Helium mix
2
percentages
2
January 25, 2008