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? Böhler UNION AlSi 5 1.2 mm x 7 kg welding wire – Professional quality for aluminum welders

Böhler UNION AlSi 5 welding wire with a diameter of 1.2 mm and a weight of 7 kg is a high-performance solid GMAW (MIG) wire for welding aluminum alloys containing up to 2% alloying elements and up to 7% silicon (Si). Importantly, thanks to its excellent weld pool fluidity, it provides a stable arc and aesthetically pleasing welds, making it an ideal choice for industrial and workshop applications.

Not without significance is the fact that Böhler UNION AlSi 5 is characterized by exceptional resistance to atmospheric corrosion. Therefore, it is ideal for truck body manufacturing, tank construction and aluminum casting repairs. What’s more, its chemical composition minimizes the risk of hot cracks, resulting in better quality and durability of the weld.

? Key features of Böhler UNION AlSi 5 1.2 mm x 7 kg wire

✅ Professional GMAW (MIG) welding wire – ideal for aluminum and its alloys.
✅ Diameter 1.2 mm, spool 7 kg – optimal for a wide range of applications.
✅ Compliance with international standards:

• AWS A5.10 – ER4043
• EN ISO 18273 – S Al 4043A (AlSi5(A))
  ✅ Very smooth weld pool – provides easy weld guidance.
  ✅ Excellent corrosion resistance – increases the durability of the joints.
  ✅ Not suitable for anodizing for decorative purposes.
  ✅ Thorough cleaning of the edges of the welded material is required before welding.

Due to these properties, Böhler UNION AlSi 5 wire is excellent for use in:
? Aluminum constructions
? Production and repair of truck bodies
? Construction of tanks and architectural elements
? Repairs of aluminum castings

? Technical specifications – Böhler UNION AlSi 5 1.2 mm x 7 kg

? Wire type: Solid, GMAW (MIG)
? Wire diameter: 1.2 mm
? Spool weight: 7 kg
? Classification:

• AWS A5.10 – ER4043
• EN ISO 18273 – S Al 4043A (AlSi5(A))
  ? Wire chemical composition (%):
  • Si (silicon): 4.5 – 6.0%
  • Fe (iron): < 0.6%
  • Cu (copper): < 0.3%
  • Mn (manganese): < 0.15%
  • Mg (magnesium): < 0.2%
  • Zn (zinc): < 0.10%
  • Al (aluminum): balance
    ? Mechanical properties of the alloy:
  • Yield strength (Rp0.2): ≥ 70 MPa
  • Tensile strength (Rm): ≥ 130 MPa
  • Elongation (A): ≥ 16%
    ? Recommended welding conditions:
  • Shielding gas: Argon (I1) or argon-helium mixtures (I3).
  • Welding current: DC (+).
  • Material preparation: Heating to 150 – 200°C for thicker materials.

? Why should you choose Böhler UNION AlSi 5 wire?

✔ Top quality from Böhler, the world leader in welding technology.
✔ Excellent resistance to corrosion and hot cracking – durable and aesthetically pleasing welds.
✔ Minimal chipping and stable arc – comfort and precision work.
✔ Ideal for professional applications – it will work well in both workshops and large industrial plants.

As an official distributor of Böhler Welding, we offer original products at competitive prices. Check out our offer and see why professionals choose Böhler UNION AlSi 5!