welding Consumables > MIG Aluminum ER4043
Aluminum MIG welding wire ER4043

ER4043 aluminum-silicon welding wire is the go-to solution for welding heat-treatable aluminum alloys, especially the popular 6XXX series. Its special 5% silicon formula creates smoother, more stable welds with fewer defects compared to standard aluminum wires – perfect for projects where appearance and reliability matter.

Standards: AWS A5.10 ER4043

  • Manufactured in modern Chinese facilities with consistent quality
  • Mass production capacity for bulk orders
  • Flexible FCL/LCL ocean shipping options
  • Samples available upon request
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  •  Easier Welding Experience

5% silicon, which provides lower melting point and higher fluidity than 5XXX series filler metals

  • Superior Crack Resistance

Silicon compensates for magnesium (Mg) loss, reducing hot cracking sensitivity. Specifically matched for 6XXX heat-treatable alloys

  • Welding Parameters

Vertical down welding

Shielding gas: 100% Argon

  • Recommended Applications

Transportation: Train cars, shipbuilding, aircraft components
Industrial Systems: Chemical equipment, cooling systems, piping
Specialty Fabrication: High-end furniture, sports gear, architectural elements


Chemical Composition
%Al%Si%Fe%Cu%Mn%Zn
remainder50.150.130.020.05

Diameter
mminch
0.80.030
0.90.035
1.00.040
1.20.045
1.61/16