innert gas metal arc welding
Post on 07-Jan-2017
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GAS METAL ARC WELDING (GMAW)SHIELDING GAS COMPARISON
Items
Shielding Gas
RemarksArgon, Ar Mix (Ag +
CO2)
Carbon Dioxide,
CO2
Quality
Spatter Low Medium High• Post weld cleaning frequency is high as spatter produced high
Weld Penetration Low Medium High
Arc Stability High Medium Low • Weld bead weave level
Power Consumptio
nArc Energy Low Medium High
• For CO2, high current setting required to get good quality result (arc stability)
Cost Cost / Cylinder High Medium Low
WELD PENETRATION PROFILE SHIELDING GAS MATRIX
CO2 100%
ARC STABILITY
Ar 80%, CO2 20%
Ar 100%
Less Stable
More Stable
Note : 1. Mix Argon & CO2 that currently used at Body shop is 80% Argon & 20% CO2 2. Argon is use for ‘fillet’ weld (ferrous metal)
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