40430351C - Nexalloy 4043 Aluminum MIG Wire 0.035 1lb Spool

Premium ER4043 Aluminum MIG Wire for Industrial Fabrication

The Nexalloy 4043 Aluminum MIG Wire is a high-performance filler metal designed for professional and industrial welding applications involving heat-treatable base alloys. Formulated with a 5% silicon content, this ER4043 alloy is specifically engineered to lower the melting point of the weld pool, thereby increasing fluidity and wetting action. This metallurgical characteristic makes it the preferred choice for welding 6XXX series alloys, such as the widely used 6061-T6, as well as 3003, 5052, and cast aluminum alloys like 356.0.

One of the primary technical advantages of the Nexalloy 4043 is its ability to minimize solidification cracking. The silicon addition helps bridge the solidification temperature range, reducing the sensitivity to hot cracking that can occur in rigid structures or complex joint configurations. This makes it an essential consumable for automotive manufacturing, trailer fabrication, and aerospace component repair where structural integrity is paramount. The wire produces a bright, aesthetically pleasing weld bead with less surface smut compared to magnesium-alloyed wires like 5356, reducing post-weld cleaning time.

Packaged in a convenient 1lb spool, this product is optimized for use with spool guns and push-pull systems often employed for feeding softer aluminum wires. The 0.035-inch diameter offers a versatile balance between deposition rate and heat input control, suitable for thin-gauge sheet metal as well as medium-thickness plate. Nexalloy ensures precision winding and consistent diameter tolerance, guaranteeing stable arc characteristics and jam-free feeding, which is critical for maintaining productivity in high-volume industrial environments.

Key Industrial Benefits:

• Crack Resistance: Superior performance on heat-treatable alloys prone to hot cracking.
• Fluidity: High silicon content ensures excellent wetting at the toes of the weld.
• Versatility: Suitable for all-position welding using standard DCEP polarity and 100% Argon shielding gas.