4043 filler metal is a popular aluminum/silicon filler alloy for general purpose welding applications. Features/Benefits: – Moderate strength (28 ksi typical) – Low melting temperature/high fluidity – Low welding smut and discoloration – Low ductility, formability, and lower toughness – Moderate electrical conductivity and thermal conductivity – Excellent corrosion resistance – Low shrinkage rate/reduced distortion – Low hot cracking sensitivity in most applications.

Qualified to AWS A5.10, ABS / CWB / Designation AlSi5, Alloy 4043 is an all-position 5% silicon alloy used to weld heat-treatable base alloys. It is most often used to weld the 6XXX series of alloys. The silicon addition improves puddle fluidity, producing an appealing bead profile. It is less crack sensitive on the 6XXX series than other welding alloys.

4043 aluminum GTAW (TIG) welding alloy is an all-position 5% silicon alloy used to weld heat-treatable base metals. It is most often used to weld the 6XXX series of alloys. The silicon addition improves puddle fluidity, producing an appealing bead profile. It is less crack sensitive on the 6XXX series than other welding alloys. It is qualified to AWS A5.10 ER4043, ABS, ISO Designation AlSi5. It is commonly used for welding automotive parts, truck trailers and repairing bicycles.

Features

• The manufacturing process precisely controls the alloy and chemical composition to produce consistent physical characteristics
• Pristine surface condition monitored in the manufacturing process to ensure excellent weld quality
• 36″ cut length rods embossed on each end for ease of alloy identification even after the rod is partially consumed
• Manufactured under a quality system certified to ISO 9001 requirements
• Use on many weldable cast and wrought aluminum alloys
• Generally recommended for welding 5052, any 6XXX series alloys and castings
• Alloy embossed on each rod for easy identification
• Designed for welding heat treatable base alloys, specifically 6XXX series alloys
• Lower melting point and more fluidity than the 5XXX series filler alloys
• Low sensitivity to weld cracking with the 6XXX series base alloys
• All position welding rod
• Often used to for repair welding aluminum/silicon cast alloys such as grades 353/A356
• Common choice for welding 6061
• Gray (post anodized) color
• Embossed on each end for easy identification after use

Applications

• All-position welding
• Sheet metal applications on the appropriate aluminum base metals
• Bicycle frames
• Pressure vessels
• Electrical bus bars

Properties

• ALloy composition%: Si 4.5-6.0 Al Balance
• Melting range: 573-625℃
• Density: 2.68g/cmm³
• 2-permanent elongation limit（N/mm）: ≥40
• Tensile strength（N/mm）: ≥120
• Expansion（A5）: ≥8%
• Certification: DB, TUV, CE

Specifications

• Chemical Composition: Aluminum Remainder %, Magnesium 0.05% max., Manganese 0.05% max., Titanium 0.20% max., Copper 0.30% max., Silicon 4.5-6.0%, Zinc 0.10% max., Iron 0.80% max., Others Each 0.05% max., Total 0.15% max.
• Color: Gray (post anodized)
• Density: 0.097 (lbs./cu.in.)
• Elongation: 8% in 2″ (as welded 6061 base plate)
• Liquidus: 1170°F (632°C)
• Polarity: AC – Hemisphere tip shape tungsten electrode
• Solidus: 1065°F (574°C)
• Tensile Strength (psi): 27,000 psi (as welded 6061 base plate)
• Yield Strength (psi): 18,000 psi (as welded 6061 base plate)
• Warranty: 1 Year
• Welding Position: All

⚠️Caution

All parameters are suggested as basic guidelines and will vary depending on joint design, number of passes and other factors.