Thermanit 309L is a high alloyed austenitic stainless submerged arc (SAW) wire for special applications. It works on pressure vessels, pipework and austenitic steel structures where corrosion resistance matters.
Submerged arc welding gives a very high deposition rate on long, repeatable welds. The wire also serves for cladding carbon steel surfaces, and its deposit has an austenitic structure that resists corrosion.
- Classification EN ISO: 14343-A S 23 12 2 L
- AWS classification: A5.9 / SFA-5.9 ER309LMo (mod.)
- Shielding: flux matched to the wire, no shielding gas
- Diameters: 2.4 / 3.2 / 4.0 mm
Use brushes and discs kept only for stainless steel, carbon steel particles cause rust staining on the bead face. Match the flux to this wire and check how dry it is, drying the flux decides the hydrogen level in the weld. Keep an even flux layer over the arc, too thin a layer exposes the arc and too thick a one spoils the bead shape.
