TIG FILLER WIRE 4043 ALUM - 5% SILICON 3.2MM
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Availability: 10 In stock, ready to be shipped!
ER4043 Aluminum TIG Welding Rod | 3.2mm (1/8") | 5% Silicon Alloy
Product Description
This premium ER4043 aluminum TIG filler wire is engineered for professional and industrial welding applications requiring superior weld quality on aluminum and aluminum alloy base metals. Formulated with a 5% silicon content, this filler wire delivers excellent fluidity, reduced crack sensitivity, and a smooth, clean weld bead — making it the go-to choice for welding cast aluminum, automotive components, and general-purpose aluminum fabrication.
With a diameter of 3.2mm (1/8 inch), this filler rod is ideal for medium-to-thick section aluminum welding, offering stable arc performance and consistent puddle control for both manual TIG (GTAW) welding.
Key Features
- Alloy Type: ER4043 (AlSi5) – 5% Silicon Aluminum Alloy
- Diameter: 3.2mm (1/8")
- Process: TIG (GTAW) Welding
- Excellent flow characteristics for smooth, uniform weld beads
- Low crack sensitivity — ideal for welds with high restraint
- Good corrosion resistance and weld appearance
- Wide melting range, offering forgiving puddle control for various skill levels
- Anodizes to a dull grey/black finish (note for cosmetic/anodized applications)
Common Applications
- Welding cast aluminum alloys (356, 357, 319, A356, etc.)
- Automotive and marine aluminum components
- General fabrication and repair of aluminum sheet, plate, and castings
- Aluminum truck bodies, wheels, and structural parts
- HVAC and architectural aluminum welding
Recommended Base Metals
Compatible with 6061, 6063, 356, 5052 (lower strength joints), and other common wrought and cast aluminum alloys.
Why Choose ER4043 3.2mm Filler Wire?
ER4043 is one of the most widely used and versatile aluminum filler alloys due to its balance of weldability, crack resistance, and mechanical performance. The 3.2mm diameter offers the ideal deposition rate for medium-gauge aluminum welding, reducing burn-through risk while maintaining strong penetration and bead control.
This product is priced “per KG”. The minimum quantity available to purchase is shown in the "Pack Qty".
