UGIWELD 309LM (TIG 309LSi)
Tig-rod for welding of corrosion resistant material and dissimilar materials.
AWS A5.9 ER309LSi
EN ISO 14343-A 23 12 L Si
General description:
UGIWELD 309LM (TIG 309LSi) is a TIG filler rod intended for welding corrosion‑resistant stainless steels of similar composition, as well as for dissimilar welding between stainless steels to carbon steels and cladding applications. An increased silicon (Si) content enhances weld pool fluidity and wetting characteristics, resulting in improved bead appearance and reduced risk of lack of fusion. Purity is a critical factor when welding high‑alloyed materials. The weld zone shall be kept completely free from contamination to avoid defects and to preserve corrosion resistance. When cladding carbon steel, the chemical composition of the first weld layer will typically correspond to AISI 304, due to dilution from the base material. The interpass temperature shall not exceed 150 °C, and the heat input should be limited to a maximum of 2.0 kJ/mm to ensure proper weld metal properties and microstructure.
Chemical composition of welding wire:
| C | Si | Mn | Ni | Cr | Mo | Cu |
|---|---|---|---|---|---|---|
| Max 0,03 | 0,65 - 1,0 | 1,0 - 2,5 | 12,0 - 14,0 | 23,0 - 25,0 | Max 0,5 | Max 0,5 |
Packaging information:
1,0 mm: 1000mm x 5kg / 500mm x 2,5kg
1,2 mm: 1000mm x 5kg / 500mm x 2,5kg
1,6 mm: 1000mm x 5kg / 500mm x 2,5kg
2,0 mm: 1000mm x 5kg / 500mm x 2,5kg
2,4 mm: 1000mm x 5kg / 500mm x 2,5kg
3,2 mm: 1000mm x 5kg / 500mm x 2,5kg
4,0 mm: 1000mm x 5kg / 500mm x 2,5kg
Approvals:
DB, CE.
Reference/date:
UGIWELD 309LM (TIG 309LSi), English, 15.04.2026.
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