Aluminum is a valued metal thanks to its high strength-to-weight ratio and versatility. It is commonly used in marine, automotive, aerospace, railroads and shipping applications.
Compared to welding steel, aluminum is a unique type of metal that poses its own set of challenges. It is not necessarily more difficult to weld than other metals, but these unique challenges force certain methods and selection of material to be used when welding.
Managing aluminum welding involves a number of factors, including choosing the right filler metal and shielding gas blend. Praxair’s Stargon™ AL welding blend is an advanced shielding gas for welding aluminum. Versatile for use in both GMAW and GTAW processes, Stargon AL gas blend is a carefully prepared proprietary blend of argon with precisely controlled parts per million additions of active gases.
When compared to commonly used pure argon, Stargon AL blend provides better arc control, penetration and weld puddle placement, resulting in improved weld speeds and weld quality.
For GMAW welding specifically, Stargon AL provides a consistent, regular arc with reduced surface tension for better wetting, improved fusion and a smoother bead. Additionally, the Stargon AL welding gas blend provides greater penetration and enhanced stability when compared to that of pure argon. These features, when combined with proper welding techniques, helps to improve weld quality and operator appeal.