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WARNING: This product can expose you to chemicals including Nitrogen Dioxide, which is known to the State of California to cause cancer, and Carbon monoxide, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

.035" ER4043 Harris Products Group Aluminum MIG Wire 1 lb 4" Spool

Airgas Part #:HAR04043F1

Manufacturer Part #:04043F1

$13.60 /US Pound
Package Size Options
$13.60 US Pound
$272.00 Carton 20 US pound / Carton

Item Details

  • 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 qualified to AWS A5.10 ER4043, ABS, ISO Designation AlSi5. It is commonly used for welding automotive parts, truck trailers and repairing bicycles.


  • 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


  • Liquidus 1170°F (632°C) (as welded 6061 base plate)
  • Solidus1065°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)


  • Automotive components - frames and drive shafts
  • Truck trailers
  • Bicycles
  • 6XXX alloys
  • Casting alloys


  • All parameters are suggested as basic guidelines and will vary depending on joint design, number of passes and other factors.

Product Attributes


» .035"


» 1 lb

AWS Classification

» ER4043

Trade Name

» Harris Products Group

Spool Diameter

» 4"


» Spool