What welding wire is used for welding Q345R, 20, and S31603?
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What welding wire should be used for welding Q345R, 20, and S31603: ER309 or ER309LMo?
It’s supposed to be ER309LMo, but I found that it really can’t withstand impacts at -20 degrees Celsius! Now, I plan to try using ER309L and ER309 in turn; if that doesn’t work, then I’ll have to use ENiCrFe-2. It’s going to be a bit more troublesome