Is an argon/helium based mixtures and are inert, non-toxic, colourless and odourless. Supplied in high pressure metal cylinders.
Used in GMAW and GTAW for aluminium and aluminium alloys (Argon 25 up to 6mm).
Is faster than argon, producing flatter, smoother, broader weld beads with greater penetration, fewer defects and improved productivity. It does not produce as fierce an arc as Argon 75 and gives less chance of burn through in thin sections.