Argon-Helium-Carbon Dioxide Mixture -- Praxair's HeliStar® GV Blend
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HeliStar® GV gas blend is a specially formulated mixture of argon, helium and carbon dioxide designed for joining a variety of coated steels. The HeliStar GV gas blend reduces the spatter and porosity problems commonly associated with the welding of coated steels. Both galvanized and galvannealed materials can be successfully joined without the need for additional post-weld cleanup and rework.
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HeliStar GV blend is superior to two part gas blends for welding coated steels because of the increased arc stability it provides. The addition of helium to this gas blend also makes higher travel speed possible in a number of applications. While optimized for pulsed-GMAW, the HeliStar GV blend performs well in all types of metal transfer (short-circuiting, pulsed, and conventional spray).
Benefits
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Performance on coated steels unmatched by other gas blends.
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Reduces clean-up and rework, with reduced spatter and porosity formation.
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A single shielding gas can be used for multiple materials/applications
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Less need to recoat material after welding; reduced welding costs.
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No need to purchase expensive metal-cored wires specifically designed for coated steels.
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Typical Applications
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When used with pulsed-spray transfer and ER70S-3 wire, the Helistar GV blend provides superior results on coated steels.
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Agricultural applications including grain handling/storage equipment and farm implements.
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Automotive applications including exhaust system parts and body component fabrication such as the attachment of galvanized door hinges to galvannealed body panels.
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Refrigeration equipment and appliance cabinets.
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Joining thin gauge coated steels for HVAC ductwork in industrial applications.
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