49433641C - Nexalloy ER4943 Aluminum MIG Wire 3/64" 1lb Spool

High-Performance Aluminum Welding with Nexalloy 4943

Unlock the full potential of your aluminum fabrication projects with Nexalloy 4943 MIG Wire. This 1 lb spool of 3/64" (approximately 1.2mm) wire represents a modern advancement in aluminum filler metals, designed to bridge the gap between the ease of use of 4043 and the strength requirements of structural applications. Nexalloy, a leader in aluminum welding consumables, has formulated this alloy to address common limitations found in traditional filler metals.

Superior Strength and Fluidity

For decades, welders have relied on 4043 for its crack resistance and general usability, often sacrificing strength. Nexalloy 4943 changes the game by offering higher tensile and yield strength in the as-welded condition. Unlike 4043, which relies heavily on dilution with the base metal to achieve its mechanical properties, 4943 maintains high strength independently. This makes it an exceptional choice for welding 6061-T6 and other 6xxx series alloys where structural integrity is paramount.

Beyond strength, the wetting action of 4943 is noticeably superior. The molten pool flows more freely, allowing for faster travel speeds and flatter bead profiles. This improved fluidity helps reduce the "mounding" often seen with aluminum MIG welding, resulting in smoother transitions at the toes of the weld and reducing potential stress risers.

Ideal for Spool Guns and Portable Applications

This product comes in a convenient 1 lb (4-inch) spool, specifically designed for use with spool guns. Whether you are performing mobile repairs, automotive modifications, or intricate fabrication work where a standard push-pull system is too bulky, this compact spool ensures you have premium filler metal ready to go. The 3/64" diameter is a versatile size, offering good deposition rates while remaining manageable for thinner gauge materials often encountered in general repair work.

Key Benefits of Switching to 4943

• Enhanced Mechanical Properties: Delivers up to 25% higher ultimate tensile strength compared to standard 4043.


• Heat Treatable: Responds better to post-weld heat treatment, maintaining properties closer to the base metal.


• Clean Finishes: Produces welds with low smut and discoloration, reducing post-weld cleaning time.


• Versatility: Excellent for automotive frames, motorcycle components, ladders, and recreational equipment.

Choose Nexalloy 4943 for your next aluminum project and experience the difference that a premium, modern alloy can make in both weld quality and ease of operation.