Thermanit H-347 is a high alloyed austenitic stainless submerged arc (SAW) wire. It is used on process installations, heat exchangers, sanitary structures and parts exposed to corrosion.
The wire joins grades such as 1.4301, X5CrNi18-10, 1.4306, X2CrNi19-11, 1.4311, 1.4312 and 1.4541, along with related materials. It also serves for cladding carbon steel surfaces, and its composition protects the joint against intergranular corrosion.
- Classification EN ISO: 14343-A S 19 9 Nb
- AWS classification: A5.9 / SFA-5.9 ER347
- Shielding: flux matched to the wire, no shielding gas
- Diameters: 1.5 / 2.0 / 2.4 / 3.0 / 3.2 / 4.0 mm
Keep the interpass temperature low and the beads narrow, overheating austenitic steel promotes carbide precipitation and distortion. Keep an even flux layer over the arc, too thin a layer exposes the arc and too thick a one spoils the bead shape. Watch the wire stick-out and the position of the head against the weld centre line, under a flux you cannot see the pool and a mistake shows only after the slag is chipped off.
