Aluminum Tig Rod - ER4043
ER4043 aluminum TIG rod is the general-purpose aluminum GTAW filler (AWS A5.10), an aluminum-silicon (~5% Si) alloy that flows smoothly and resists cracking. It's the go-to for welding and repairing 6xxx-series castings and extrusions like 6061. 36" cut lengths in 1/16", 3/32", and 1/8", welded under 100% argon on AC.
| AWS Classification | AWS A5.10 ER4043 |
| Alloy | Aluminum-silicon (~5% Si) |
| Shielding Gas / Polarity | 100% Argon · AC |
| Form | 36" cut lengths — 1/16", 3/32", 1/8" |
Frequently Asked Questions
Why choose ER4043 for TIG?
Its lower crack sensitivity and smooth, fluid puddle make it forgiving on 6xxx-series castings and extrusions — the easiest aluminum rod for most repair and fabrication.
Does ER4043 anodize to match the base metal?
It tends to turn slightly gray after anodizing. For a closer color match, use ER5356.
