Not sure what the gap is between the coupons, but it should be no more than the diameter to the root pass rod. Where I used to work all root passes for mild steel was done with 6013 rod. It splatters a lot but easier to control. You may get burn through holes if you go too slow. Grind any flux off the root and rest is done with 7018, in this case probably 1/8 dia.
-
Welcome back Guest! Did you know you can mentor other members here at H-M? If not, please check out our Relaunch of Hobby Machinist Mentoring Program!
Carbon Steel Pipe Coupons & Welding
- Thread starter erikmannie
- Start date