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4043 aluminum MIG welding alloy is an all-position, 5% silicon alloy used to weld heat treatable base alloys. It is most often used to weld the 6XXX series of alloys. The silicon addition improves puddle fluidity, producing an appealing bead profile. It is less crack sensitive on the 6XXX series than other welding alloys. It is commonly used for welding automotive parts, truck trailers and repairing bicycles.
Features
AWS A5.10 ER4043, ABS
ISO Designation AlSi5
4043 aluminum/silicon GMAW (MIG) welding alloy
Designed for welding heat treatable base alloys, specifically 6XXX series alloys
Lower melting point and more fluidity than 5XXX series filler alloys
Low sensitivity to weld cracking with 6XXX series base alloys
Suitable for sustained elevated temperature service, i.e. above 150°F (65°C)
All position, except vertical down welding
Gray (post anodized) color
Specifications
Liquidus 1170°F (632°C) (as welded 6061 base plate)
Solidus 1065°F (574°C) (as welded 6061 base plate)
Tensile Strength 27,000 psi (as welded 6061 base plate)
Yield Strength 18,000 psi (as welded 6061 base plate)
Density 0.097 lbs./cu.in. (as welded 6061 base plate)
Elongation in 2" 8% (as welded 6061 base plate)
Applications
Automotive components - frames and drive shafts
Truck trailers
Bicycles
6XXX alloys
Casting alloys
Caution
All parameters are suggested as basic guidelines and will vary depending on joint design, number of passes and other factors.