SAl 4043 is a premium aluminum-silicon alloy welding wire containing approximately 5% silicon, offering outstanding weld fluidity and crack resistance. Classified as AWS A5.10 ER4043 / R4043 and EN ISO 18273 S Al 4043, it is specifically engineered for MIG and TIG welding of 6XXX series and cast aluminum alloys.
Its low melting point, smooth arc characteristics, and bright weld appearance make it a go-to choice for fabrication, casting repairs, and structural applications.
Key Features
Excellent arc stability with low spatter
Smooth, aesthetically bright weld beads
Outstanding resistance to thermal cracking
Ideal for joining heat-treatable 6000 series aluminum alloys
Also suitable for brazing and welding aluminum castings
Specifications
Alloy Type: ER4043 / S Al 4043
Diameter: 1.0 mm
Spool Weight: 2 kg
Standards: AWS A5.10 / EN ISO 18273
Melting Range: 574–632 °C
Density: 2.68 g/cm³
Recommended Use
SAl 4043 is ideal for welding:
6000 series aluminum alloys such as 6061 and 6063
Forged and cast aluminum components with silicon content ≤7%
Brazing and overlay applications requiring bright, clean finishes
Commonly used across:
Transportation: shipbuilding, automotive, railcar structures
Industrial and consumer goods: chemical equipment, sports frames, furniture
Manufacturing: molds, containers, tools, general fabrication
Important Note:
Not recommended for welding aluminum-magnesium alloys, as it may form brittle Mg₂Si phases, reducing joint ductility and corrosion resistance.
Also not suitable where anodised colour match is required.
Aluminum 4043 MIG Wire 1.0mm 2.0kg
Proper Storage:
To maintain wire quality, store in a dry, well-ventilated area (10–40°C, max 60% humidity). Keep wire on pallets or racks, never directly on the floor or near walls. Do not remove anti-oxidation packaging until use. Once opened, use promptly to avoid moisture exposure. Follow First-In-First-Out (FIFO) handling.