404311616C - Nexalloy ER4043 Aluminum MIG Wire 1.6mm (1/16") - 16 lb Spool

Premium Nexalloy 4043 Aluminum MIG Wire for Industrial Fabrication

The Nexalloy 4043 Aluminum MIG Wire is a high-performance filler metal designed for professional welding applications requiring precision, strength, and excellent cosmetic appearance. This specific spool contains 16 lbs of 1.6mm (1/16") diameter wire, making it an optimal choice for medium-to-heavy duty industrial fabrication where higher deposition rates are required. The ER4043 classification indicates a 5% silicon content, which significantly lowers the melting point of the wire relative to the base metal. This characteristic improves the fluidity of the weld pool, allowing for better wetting action and smoother bead profiles.

One of the primary technical advantages of Nexalloy 4043 is its ability to minimize solidification cracking, a common issue when welding heat-treatable alloys such as the 6000 series (e.g., 6061, 6063). The silicon addition acts as a crack suppressant, ensuring structural integrity in critical components. Furthermore, this alloy produces welds with a bright, clean finish and very little smut, reducing post-weld cleaning time. It is widely used in the automotive industry, for bicycle frames, and for general repair of aluminum castings (grades 43, 355, 356, and 214).

This 1.6mm wire requires a MIG welding system capable of handling thicker aluminum wires, typically utilizing a push-pull gun or a spool gun designed for larger diameters to ensure consistent feeding. The 16 lb spool size is designed for production environments, reducing downtime associated with frequent spool changes. For optimal results, use with 100% Argon shielding gas or Argon/Helium mixtures for thicker sections.