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Welders looking for a reliable and forgiving aluminum wire will find the Nexalloy 4043 1 lb spool to be an essential addition to their consumables inventory. Classified as ER4043, this wire is an aluminum-silicon alloy containing approximately 5% silicon. This composition provides distinct advantages over magnesium-based alloys like 5356, particularly regarding weldability. The silicon content increases the fluidity of the puddle, allowing the metal to flow smoothly into the joint toes, which helps reduce the risk of lack of fusion defects and creates a more aesthetically pleasing profile.
This specific spool is a 1 lb (0.45 kg) package, designed primarily for direct-connect spool guns. Feeding aluminum wire through a standard 10-15 foot MIG torch liner is notoriously difficult due to the wire's softness; using a spool gun with this 4-inch diameter spool eliminates bird-nesting and ensures consistent arc stability. The wire diameter is nominally 3/64", which is frequently interchangeable with 0.045" drive rolls and contact tips in the aluminum welding context.
While ER4043 has slightly lower tensile strength and ductility than ER5356, it compensates with superior crack resistance. It is the preferred filler metal for welding 6000-series base metals (Al-Mg-Si) and is also suitable for welding 5000-series alloys with less than 2.5% magnesium. It is also capable of operating at higher temperatures than 5356, making it suitable for service temperatures above 150°F (65°C). Whether you are repairing a cracked transmission housing or fabricating a custom aluminum bracket, Nexalloy 4043 delivers the performance and consistency professional welders demand.
| Additional Information |
|---|
| Brand:Nexalloy |
| AWS Spec:ER4043 |
| Diameter:1.2mm (0.045") |
| Packaging:1 lb Spool |
| Weld Process:MIG (GMAW) |
| Material:Aluminum |
| Polarity:DCEP |
| Alloy Type:AlSi5, Aluminum-Silicon |
| Shielding Gas Requirement:100% Argon, Argon/Helium Mixtures |
| Tensile Strength:27,000 - 29,000 PSI |
| Melting Range:1065°F - 1170°F |
| Spool Size:4 in (1 lb) |
| Packaging Description:1lb spool |
| Position:All Position |
