Standard: GB/T10858 SAI4043 AWS A5.1 ER4043
Ingredients: Si=4.5-6.0%; Fe≤0.8%； Al surplus.
Explanation: ER4043 is an aluminum silicon alloy welding wire containing 5% silicon, with a melting point of 573-625 ℃. It has good fluidity and strong resistance to thermal cracking, but insufficient ductility. Due to the high silicon content, brittle Mg2Si is easily generated in the weld seam when used for high welding, which reduces the plasticity and corrosion resistance of the joint. In addition, the surface color of the weld seam appears darker, and after anodizing treatment, it is even more different from the color of the base metal.
Usage: Used as a filling material for argon arc welding and gas welding of aluminum alloy workpieces and castings other than aluminum. Commonly used for welding 600 series aluminum alloys such as 6061, 3000 series and 2000 series aluminum alloys, and cast aluminum. Widely used in industries such as railway locomotives, chemicals, and food.

Name: ER4047 Aluminum Silicon Solder
Standard: GB/T13815 BA188Si AWS A5.1 ER4047
Explanation: ER4047 silicon alloy aluminum welding wire has a lower melting point of about 500 ℃ and higher fluidity (12% silicon content) than ER4043, and can also be used as a welding material. Can be used as a substitute for ER4043, with higher silicon content, which helps reduce hot cracks and generate higher fillet weld shear strength.
Usage: Commonly used for various difficult welding of aluminum (thin) parts, condensers, air conditioning pipes, high-pressure aluminum pipes, automotive water tanks, fuel tanks, etc.