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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.

.025" ER4043 Harris® 4043 Aluminum MIG Welding Wire 1# 4" Spool

Airgas Part #:HAR04043D1

Harris Welco

Manufacturer #:04043D1



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$25.54 /US Pound
Package Size: 1 US pound
$25.54 US Pound
$25.54 US Pound
$510.80 Carton 20 US pound / Carton

Typically in Stock

Item Details

  • Harris Welco® ER4043 .025" Aluminum MIG Welding Wire comes in 4" spool of 1 lb and is suitable to weld heat-treatable base alloys. 4043 Series alloy is less sensitive for cracks and addition of silicon improves puddle fluidity while offering appealing bead profile. Alloy that is an all-position 5% silicon alloy can be used to weld 6XXX series alloys. Alloy is suitable for bicycles, truck trailers and automotive parts application. Wire meets AWS A5.10, ABS/CWB/designation AlSi5 specification.


  • Alloy 4043 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


  • ANSI/AWS A5.10
  • ASME SFA 5.10
  • QQ-R-566B
  • AMS 4190


  • Automotive parts
  • Truck trailers
  • Bicycles

Product Attributes

AWS Classification

» ER4043


» .025"


» 1 lb

Spool Diameter

» 4"