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5/32" X 36" ER4043 Harris® 4043 Aluminum TIG Rod 10 lb Box

Airgas Part #:HAR0404370

Manufacturer Part #:0404370

$9.49 /US Pound
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Item Details

  • 4043 aluminum GTAW (TIG) welding alloy is an all-position 5% silicon alloy used to weld heat-treatable base metals. 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.


  • Designed for welding heat treatable base alloys, specifically 6XXX series alloys
  • Lower melting point and more fluidity than the 5XXX series filler alloys
  • Low sensitivity to weld cracking with the 6XXX series base alloys
  • All position welding rod
  • Often used to for repair welding aluminum/silicon cast alloys such as grades 353/A356
  • Common choice for welding 6061
  • Gray (post anodized) color
  • Embossed on each end for easy identification after use


  • Chemical Composition: Aluminum Remainder %, Magnesium 0.05% max., Manganese 0.05% max., Titanium 0.20% max., Copper 0.30% max., Silicon 4.5-6.0%, Zinc 0.10% max., Iron 0.80% max., Others Each 0.05% max., Total 0.15% max.
  • Color: Gray (post anodized)
  • Density: 0.097 (lbs./cu.in.)
  • Elongation: 8% in 2" (as welded 6061 base plate)
  • Liquidus: 1170°F (632°C)
  • Polarity: AC - Hemisphere tip shape tungsten electrode
  • Solidus: 1065°F (574°C)
  • Tensile Strength (psi): 27,000 psi (as welded 6061 base plate)
  • Yield Strength (psi): 18,000 psi (as welded 6061 base plate)
  • Warranty: 1 Year
  • Welding Position: All


  • Welding 6XXX series alloys
  • Repair welding of aluminum/cast alloys
  • Automotive components


  • Warning: Protect yourself and others. Read and understand this information.
  • Fumes and Gases can be hazardous to your health.
  • Heat Rays (infrared radiation) from flame or hot metal can injure eyes.
  • Before use, read and understand the manufacturer’s instructions, Material Safety Data Sheets (MSDS), and your employer's safety practices.
  • Keep your head out of fumes. Use enough ventilation, exhaust at the flame, or heat source, to keep fumes and gases from your breathing zone and the general area.
  • Wear correct eye, ear, and body protection.
  • See American National Standard Z49.1, Safety in Welding, Cutting, and Allied Processes, published by the American Welding Society, 8669 Doral Blvd., Doral, Florida 33166
  • OSHA Safety and Health Standards, available from the U.S. Government Office, Washington, DC 20402.
  • All parameters are suggested as basic guidelines and will vary depending on joint design, number of passes and other factors.

Product Attributes


» 5/32"

AWS Classification

» ER4043


» 10 lb

Trade Name

» Harris®
» Harris® 4043


» 36"


» Box