NST MIG 309 LSi
Solid wire for welding corrosion resistant materials (without Mo) to carbon steel.
AWS: A5.9 ER 309LSi
EN ISO 14343: 2009 23 12 LSi
NST MIG 309LSi is a low-carbon, solid MIG/MAG wire for welding of corrosion resistant materials such as AISI 304, EN 1.4301, EN1.4307 against carbon steel. The wire is also used for cladding of carbon steel. Normally an Argon/CO2 or Argon/O2 mix are used as the shielding gas. This ensures a user friendly stable welding arc, with less spatter, good visual bead appearance and smooth transition to the parent material. The wire can be used both with or without Pulse-syncing. When cladding carbon steel, the analysis of the weld metal in first layer is equivalent to AISI304. ”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 should not exceed <2.0kJ/mm. The weld metal will have an Austenitic structure with a low portion of Ferrite, typically 5-9%.
Chemical composition of welding wire:
1,0mm x 12,5kg spool D300 -ArticleNo.:1263023
1,2mm x 12,5kg spool D300 -ArticleNo.:1263021
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NST MIG 309LSi, English, 08.02.2016.