Sandvik SX is a filler wire for joining Sandvik SX steel (UNS S32615, ASME Code Case 2029-3) used in concentrated sulfuric acid. Sandvik SX wire can be used for MIG-, TIG- and PAW welding.
Chemical composition (nominal) %
Microstructure (all-weld metal)
Austenitic matrix with a ferrite content of about 16FN according to DeLong.
MIG TIG – typical for non-heat treated weld metal
|Yield strength, Rp0.2||MPa||327|
|Tensile strength, Rm||MPa||668|
Corrosion resistance (all-weld metal)
Sandvik SX has excellent corrosion resistance in concentrated sulfuric acid, both in static and dynamic conditions. The corrosion resistance is close to that of the parent material.
Recommended welding data
Always weld with as low heat input as possible (max 1,0 kJ/mm). Keep interpass temperature below 60°C (140°F). Clean joints before welding and use pickling paste for post weld cleaning.
No weaving except for vertical up position. Recommended shielding gas: pure Argon or Argon/Helium mixture (20-30% He).
Always weld Sandvik SX tube and plate with filler metal. Recommended shielding gas: pure Argon or Argon/Helium mixture (20-30% He).