| Carbon
Dioxide
The majority of flat-position
large-diameter (> 1/16") flux-cored wires that use a secondary
shielding gas use carbon dioxide. The arcs are generally quiet with
high deposition rates and are good for welding over rust and mill scale
on heavy plate.
Argon-Carbon
Dioxide Mixtures -- Praxair's StarGold™ Blends
Most of the small-diameter
(< 1/16") and all position cored wires use an argon-based shielding
gas. These gas blends provide greater weld puddle control lower welding
fume and are preferred by welders because of ease of use.
Argon-Oxygen
Mixtures -- Praxair's StarGold™ Blends
Small amounts of oxygen
may be added to argon for welding carbon steels; however, shielding
gas blends, such as argon-2% oxygen, are used primarily for Gas Metal
Arc Welding (GMAW) of stainless steels. |
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