AlcoTec ER 4043 ALMIGWELD Aluminium Wire

AWS A5.10 (ER & R 4043)

0.8mm – 6.35kg spool
1.0mm – 7.26kg spool
1.2mm – 9.07kg spool
1.6mm – 9.07kg spool

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AlcoTec ER 4043 or Alloy 4043 is one of the oldest and most widely used welding and brazing alloys. Almigweld 4043 can be classed as a general purpose type filler alloy. The silicon additions result in improved fluidity (wetting action) to make the alloy a preferred choice by welders. The alloy is less sensitive to weld cracking and produces brighter, almost smut free welds.

Typical Applications –

  • Welding Filler Wire.
  • Spray and Flame Metallizing Wire.

General Information – 

  • Trade designation: Almigweld (GMAW Filler Wire)
  • Non-Heat treatable – Similar to AlSi5 (Germany), BS N21 (United Kingdom)
  • EN ISO 18273 designation: AlSi5
  • Principle alloying elements: Silicon
  • Applicable specifications: ANSI/AWS A5.10 (ER & R), AMS 4190 (Chemistry Only)

AlcoTec ER 4043 Specifications (Almigweld GMAW Filler Wire):

ESAB produces the world’s top-selling aluminum MIG / GMAW wires and rods, known for best-in-class performance and productivity plus optimized chemistry for excellent weld appearance.

Reference: Manufacturer’s Page.
Check out other AlcoTec wires here.

Additional information

Weight N/A

0.8 (404315036X), 1.0 (404315040X), 1.2 (404320047X), 1.6 (404320062X)


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AlcoTec aluminum welding wire alloys, aluminum metallizing wires and mechanical wire products are industry-leading aluminum process solutions. Product range includes: Aluminum TIG (GTAW) welding wire, Aluminum MIG (GMAW) welding wire, Brazing wire, Metallizing wire, Tie Wire.

Complete Traceability - Each lot of electrode is marked for traceability and certified to meet American Welding Society Specifications. Expert Support - Industry leading Metallurgical Engineers are available to consult with customers in all areas of welding and proper metal selection and have been technically trained to solve your production challenges. Protective Packaging - Engineered to ensure superior quality retention from the production facility to your shelves.

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ESAB Corporation is a world leader in fabrication and specialty gas control technology, providing our partners with advanced equipment, consumables, automation, robotics, and digital solutions which enable the everyday and extraordinary work that shapes our world.

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