EX4043000000930T00 - Exocor ER4043 Aluminum TIG Welding Rod - 3/32 in. Diameter

Industrial Grade ER4043 Aluminum TIG Filler Metal

The Exocor ER4043 Aluminum TIG Welding Rod is a premium quality filler metal designed to meet the rigorous demands of industrial aluminum fabrication. Composed of approximately 5% silicon, this alloy (UNS A94043) is formulated to significantly reduce the melting temperature of the filler relative to the base metal. This characteristic is critical in minimizing solidification cracking, a common issue when welding heat-treatable aluminum alloys such as the 6xxx series. The product complies with AWS A5.10 specifications, ensuring consistent chemical composition and mechanical properties for code-compliant work.

In manufacturing environments, the fluidity of ER4043 is a primary advantage. The silicon addition increases the wetting action of the weld pool, allowing for faster travel speeds and smoother tie-ins at the toes of the weld. This makes it the preferred choice for automotive components, bicycle frames, and general structural aluminum applications where 6061-T6 is the base material. While ER4043 possesses slightly lower shear strength than ER5356, its superior resistance to hot cracking makes it indispensable for complex joint configurations where constraint is high.

This product is supplied in standard 36-inch cut lengths, cleaned and packaged to prevent oxide contamination during storage. It is suitable for use with 100% Argon shielding gas or Argon/Helium mixtures for thicker sections requiring greater heat input. Note that while ER4043 provides excellent weldability, it is not recommended for parts that will be anodized after welding, as the silicon content causes the weld bead to turn a dark gray color during the anodizing process.

Technical Specifications

• Classification: AWS A5.10 ER4043
• Diameter: 3/32" (2.4mm)
• Tensile Strength: ~29,000 psi (typical)
• Yield Strength: ~10,000 psi (typical)
• Elongation: 8% in 2 inches
• Melting Range: 1065°F - 1170°F