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

Smooth Flowing Aluminum TIG Rod for Clean Welds

If you are TIG welding aluminum, specifically 6061 or cast aluminum parts, the Exocor ER4043 rod in 3/32" diameter is likely the best filler metal for the job. Known among welders as the "forgiving" alloy, 4043 contains 5% silicon. Why does that matter? The silicon makes the molten puddle more fluid and wet out better than other alloys like 5356. This means you get a flatter, smoother bead profile with less effort, and the puddle flows nicely into the corners of T-joints and fillets.

One of the biggest headaches in aluminum welding is "hot cracking"—when the weld cracks as it cools. ER4043 is specifically formulated to resist this. It stays molten slightly longer and freezes in a way that relieves stress in the joint. This makes it the standard choice for welding 6061-T6 tubing, automotive brackets, and general repairs on aluminum castings (like 356.0). The 3/32" diameter is a versatile size, perfect for material thicknesses ranging from 1/8" up to 1/4", giving you good control over your deposition rate.

When using this rod, ensure your base metal is thoroughly cleaned with a stainless steel wire brush and acetone to remove oxides and oils. Use pure Argon gas and an AC TIG setting with a balance appropriate for cleaning action. The rod feeds smoothly and leaves a bright, shiny weld that looks professional. Just remember: if you plan to color-anodize your part later, this rod will turn dark gray; for clear anodizing or painting, it works perfectly fine.

Why Choose Exocor ER4043?

• Great Puddle Control: The silicon content makes the puddle easy to move and manipulate.
• Crack Resistant: Reduces the chance of centerline cracks in rigid assemblies.
• Versatile: Bonds well to 3003, 5052, and 6061 base metals.
• Clean Finish: Produces less smut and soot compared to magnesium-alloyed rods.