Stainless Tig Rod - ER309L
ER309L stainless TIG rod is a high-alloy GTAW filler (AWS A5.9) for joining dissimilar metals — stainless to carbon or mild steel — and for buffer and overlay layers. Its higher chromium and nickel handle the dilution of mixed joints, keeping the weld austenitic and crack-resistant. 36" cut lengths in 1/16", 3/32", and 1/8", under 100% argon, DCEN.
| AWS Classification | AWS A5.9 ER309L |
| Typical Use | Dissimilar joints (SS ↔ carbon steel), 309, overlay |
| Shielding Gas / Polarity | 100% Argon · DCEN |
Frequently Asked Questions
Why use ER309L for dissimilar TIG joints?
Its extra alloy content compensates for carbon-steel dilution when welding stainless to mild steel, keeping the weld fully austenitic and crack-resistant.
Can ER309L be used for stainless overlay?
Yes — it's a common first/buffer layer when cladding carbon steel with stainless.
