404336416C - Nexalloy 4043 Aluminum MIG Wire 3/64" 16lb Spool

Nexalloy 4043 Aluminum MIG Wire – Precision & Performance

The Nexalloy 4043 Aluminum MIG Wire is a premium-grade filler metal designed for professional industrial applications. Classified as ER4043, this wire contains approximately 5% silicon, a key additive that lowers the melting point and enhances the fluidity of the weld pool. This characteristic makes it an exceptional choice for welders seeking superior wetting action and a smooth, consistent bead profile. It is widely recognized in the industry for its ability to minimize hot cracking, particularly when welding heat-treatable base alloys such as the 6000 series (e.g., 6061-T6).

This 16 lb spool is precision-wound to ensure tangle-free feeding, which is critical for automated or high-volume manual welding operations. The 3/64" (approximately 1.2mm) diameter is a standard size for medium-to-heavy fabrication tasks, offering a balance between deposition rate and control. The wire produces a bright, aesthetically pleasing finish with significantly less smut than magnesium-alloyed wires like 5356, reducing post-weld cleanup time.

At Josef Gas, we recommend Nexalloy 4043 for general purpose aluminum welding where high shear strength is not the primary concern. It is compatible with 100% Argon shielding gas or Argon/Helium mixtures for thicker sections. Whether you are fabricating structural frames or repairing cast aluminum components, this wire delivers reliable, high-quality results.