L 109
Pure aluminum covered electrode (model E 1 100) is an aluminum covered electrode with pure aluminum as welding core and salt-based coating. Used for welding aluminum plates, pure aluminum containers and aluminum alloy components with low requirements.
L209
Al-Si covered electrode (E4030) is an aluminum alloy covered electrode with Al-Si alloy as the core and salt-based coating. It has great versatility, good thermal cracking resistance and certain mechanical strength of weld metal. Used for welding aluminum plates, aluminum-silicon alloy castings, forged aluminum, hard aluminum and other general aluminum alloys. But it is not suitable for welding Al-Mg alloy.
L309
Al-Mn covered electrode (model E3003) is an aluminum alloy covered electrode with Al-Mn alloy as the welding core and salt-based coating, which is characterized by high welding strength and corrosion resistance similar to that of aluminum. Used for welding Al-Mn alloy, pure aluminum and other aluminum alloys.
L409
Al-Mg covered electrode (E5 183) is an aluminum alloy covered electrode with Al-Mg alloy as the welding core and salt as the coating. It is a versatile welding material. The cast-forged aluminum alloy suitable for welding or surfacing magnesium has high strength, good ductility and good corrosion resistance. Mainly used for aluminum-manganese alloy welding in sports equipment such as bicycles and aluminum scooters, locomotive carriages, chemical pressure vessels, ordnance production, shipbuilding and other industries.