Hi friend,
I use Tig rode ER2549 to weld Supper Duplex thickness 8mm. However, it failed 2 times because ferrit content is out of requirement range (35-60%). On the other hand, Pitting corrosion also doesn't meet requirement. Pls give me advice (Range heat input, interpass temparature, U, I) for how to weld so that it pass.