ER4043 Aluminium Filler Wire is a 5% silicon, all position weld wire designed for welding heat-treatable base alloys and more specifically the 6000 series alloys. ER4043 Aluminium Welding Filler Wire has a lower melting point and more fluidity than the 5000 series filler alloys and low sensitivity to weld cracking with the 6000 series base alloys. ER4043 Aluminium Filler Wire is recommended for welding 3003, 3004, 5052, 6061, 6063, and casting alloys 43, 355, 356, and 214. Alloy 4043 Welding Filler Wire has a melting range of 1065 – 1170 degrees F and a density of .097 lb./cu in. Tensile strength average of ER4043 Aluminium Filler Wire is 29,000 psi.
ER4043 alloy welding wire is less sensitive to weld cracking and produces brighter, almost smut free welds. ER 4043 Aluminium Filler Wire is used in a wide range of applications like automotive components such as frame and drive shafts, bicycle frames, trucks, trailers, and equipment. Silicon with this alloy gives improved wetting action yielding a less crack sensitive bright weld bead.
ER4043 Filler Wire has a lower melting point and more fluidity, and is preferred by most welders because it "wets and flows better" and it's less sensitive to weld cracking with the 6xxx series base alloys. 4043 can also be used for welding castings.