Bohler Union AlSi5 MIG Wire

Böhler Union AlSi5 (ER4043) MIG Wire

A premium aluminium MIG wire engineered for welding Al-Si alloys up to ~7% Si, offering excellent fluidity and smooth arc for reliable results.

Key Features

• Solid MIG wire compliant with EN ISO 18273 S-Al 4043A and AWS A5.10 ER4043 standards
• Ideal for welding various Al-Si aluminium alloys, including common structural grades
• Fluid weld pool ensures smooth bead appearance; suitable for filler use on thicker plate and cast alloys
• Copper-coated to promote consistent feed and reduce contact-tip wear

Ideal For

• MIG welding of Al-Si alloys (e.g., 4043, 4060, 6082, 6061 series)
• Structural fabrications, repairs, and maintenance involving aluminium
• Applications in automotive, transport, and construction

Specifications

• Base Material: Aluminium alloy with 5% silicon
• Standards: EN ISO 18273 S-Al 4043A; AWS A5.10 ER4043

Böhler Union AlSi5 is a go-to MIG wire for professional aluminium welding, delivering versatility, quality welds, and dependable feed performance - even on less-than-perfect metal surfaces.