Union AlMg 5

Union AlSi 7 Mg is a modified 4010 alloy (alloy 4008) with low levels of impurities, specially designed for joining or repairing 7% Si aluminium cast components like 356.0, A356.0 and A357.0. The mechanical properties can be increased by heat treatment. Thorough cleaning of the workpiece bevels is necessary prior to welding.

Solid wire for AlMg alloys containing up to 3% Mg. Seawater-resistant weld metal. Good colour matching with base metal after anodizing. Thorough cleaning of the workpiece bevels is necessary. Thicker plate materials require preheating to 150°C.

Rods for GTAW of AlSi containing up to 5% Si. Oxyacetylene welding respectively brazing with suitable fl uxes possible. The weld metal is not suitable for anodizing for decorative purposes. Very fl uid weld pool. Base material should be cleaned near the seam. Pre-heating 150 - 200°C for plates > 15 mm. Do not use for welding hardenable alloys is highly stressed zones.

Zirconium micro-alloyed aluminium TIG rod. The weld metal is uncritical in terms of hot cracks. Suitable especially for complicated welding constructions with critical tensions. Base material should be cleaned near the seam. Pre-heating 150°C for plates > 15 mm.