Gas Selection For Gas Metal Arc Welding - Firepower FP-125 Operating Manual

OpERATION

4.16 Gas Selection for Gas Metal Arc Welding

Base Plate
Metal Type Thickness
Carbon Greater ER70S-X
Steel than
22 gauge
(.030")
Greater ER70S-X
than
22 gauge
(.030")
Greater ER70S-X
than
22 gauge
(.030")
Greater ER70S-X
than
10 gauge
Low Alloy Greater See Note 1
and than
High Alloy 22 gauge
Steel (.030")
Greater See Note 1
than
22 gauge
(.030")
Greater See Note 1
than
3/32"
Greater See Note 1
than
14 gauge
(.075")
Stainless
Greater
Steel than
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.
Operation
Filler Transfer Suggested
Metal Mode Shielding Gas
Short 100% CO
Circuit
Short 75% Argon
Circuit 25% CO2
Short 92% Argon
Circuit 8% CO2
Spray 92% Argon
Transfer 8% CO2
Short 75% Argon
Circuit 25% CO2
Globular
Short 92% Argon
Circuit 8% CO2
Spray 92% Argon
transfer 8% CO2
Short 98% Argon
Circuit 2% CO2
ER308-X Short 90% Helium
ER309-X Circuit 7.5% Argon
ER316-X 2.5% CO2 or
81% Argon
18% Helium
1 % CO2
ER308-X Spray 90% Helium
ER309-X Transfer 7.5% Argon
ER316-X 2.5% CO2 or
81% Argon
18% Helium
1 % CO2
ER4043 Spray Argon
ER5356 Transfer
Table 4-3: Gas Selection GMAW
FIREpOwER Fp-125, 135, 165
Welding
Positions
All Position High welding speeds. Good penetration and
2
Welding
All Position Suitable for high-current and high-speed
Welding
All Position Higher deposition rates without melt-through.
Welding Minimum distortion and spatter. Good pool
control for out-of-position welding.
Flat & HV Good arc stability, weld soundness, and
Fillet increasing width of fusion.
All Position High welding speeds. Good penetration and
Welding pool control. Applicable for out-of-position
welds. Suitable for high-current and high-
All Position Good coalescence and bead contour. Good
Welding
Flat & HV Reduces undercutting. Higher deposition rates
Fillet and improved bead wetting. Deep penetration
and good mechanical properties.
All Position Good control of melt-through and distortion.
Welding Used also for spray arc welding. Pool fluidity
sometimes sluggish depending on the base
All Position Low CO percentages in Helium mix minimizes
2
Welding carbon pickup, which can cause intergranular
corrosion with some alloys. Helium improves
wetting action and contour. CO
above 5% should be used with caution on some
Flat & HV Good arc stability. Produces a fluid but
Fillet controllable weld pool, good coalescence,
and bead contour. Minimizes undercutting on
All Position Excellent cleaning action. Provides more stable
Welding arc than helium-rich mixtures.
4-13
Comments
pool control.
welding.
speed welding.
mechanical properties.
alloy.
percentages
2
alloys.
heavier thickness.
Manual 0-5123