Electrode for aluminium castings AlSi12, CHEM-WELD 812

Product detailed description

CHEM-WELD 812

AlSi12 electrode for welding aluminium castings

Applications: engine blocks, cylinder heads, combustion engines, fans, platforms, manufacture of window and door frames, staircases, decorative elements.

For materials: G-AlSi 10Mg, 3.2381, G-AlSi12, 3.2581, G-AlSi10Mg(Cu), 3.2383, G-AlSi12(Cu), 3.2583, AlMg1SiCu, 3.3211, PA45, 6061, AlMg0,5Si, 3.3206, PA38, 6063, AlMgSi1, 3.2315, PA4, 6082, G-AlSi5Mg, 3.2373.

How to weld aluminium with electrode?

CHEM-WELD's specific aluminum electrode coating reacts with aluminum oxides to form a protective gas shield over the weld bath, which reduces oxygen absorption and thus significantly prevents the formation of inclusions.

When welding aluminium with an electrode, it is necessary to remove the aluminium oxide by cleaning the welded parts (removal of dirt, degreasing and grinding). Also clean the surface of the material at the clamping point of the grounding clamp. The actual welding must follow immediately after cleaning, otherwise the material will be degraded again. Only dried electrodes should be used due to possible hydrogen problems and subsequent porosity of the weld.

Material up to thickness of. 5-8 mm can be welded without preheating, larger thicknesses with 80-250°C preheating.

Connect the welding cable with the electrode to the + pole. Set the welding parameters. Use the HOT START function to ignite the electrode, if the welding machine allows it, setting the welding parameters to approximately 130% of the standard welding current. Guide the electrode perpendicular to the material to be welded. Weld with a very short arc at a higher speed. If the weld shape is high, it is necessary to use preheat, or increase the welding current, or increase the welding speed. The slag formed can be easily removed, thus eliminating the formation of corrosion.