ISOARC 2209 is a rutile flux coated electrode which deposits a 24%Cr, 10%Ni,3%Mo, 0.014%N duplex stainless steel weld metal having a ferrite content of about Fn30
ISOARC 2209 is designed for welding similar composition duplex stainless steels which offer an excellent combination of high strength and very good resistance to chloride induced pitting or stress corrosion cracking. Applications include offshore platform work, pipework, pipelines process vessels for chloride environments.
Avoid excessive amperage, and use AC or DC straight polarity. Maintain a short arc and use stringer bead or weaving technique. To maintain the good properties of a duplex steel it is of the utmost importance to have a good ferrite content in the weld. Make sure the root gap is sufficient to ensure good penetration. Deformation during welding is a lot less than standard grades of stainless steel
Should electrodes become moist re-dry at 300° C for 1 hour.