NST MIG Duplex 2209

NST MIG Duplex 2209 is a low-carbon, solid MIG/MAG wire for welding of Duplex materials such as SAF2205. Normally, Argon/CO2 or Argon/O2 mix are used as the shielding gas. This provides a user friendly, stable welding arc with minimum spatter, excellent visual bead appearance and smooth transition to the parent material. The wire can be used both with or without Pulse-syncing. ”Purity” is the keyword when welding high alloyed materials. Impurities in the weld, will cause porosity. Inter-pass temperature should not exceed 150°C. Heat input needs extra attention with regards to the cooling rate in order to ensure the correct balance between Austenite and Ferrite, typically between 0.5 and 2.0kJ/mm. The wire gives an Austenitic-Ferrite weld metal with good mechanical properties combined with good corrosion ability (typically 45-55% ferrite).