Weld Porosity
Greetings all!
I started welding up the new cart this week and found I'm having problems with weld porosity.
The material is 1/8" wall by 1" square mild steel tubing. All basic butt joints - nothing fancy.
Using 3/32, 2% Lanth. electrodes.
Filler - 3/32 ER70S-2
Amps set between 80 and 90.
Material is cleaned with flap disk.
Pre and post flow set to 5 and 8 respectively. I'll start the weld, puddle forms, add filler and start moving. About 7-8 second in, I SEE THE PUDDLE START TO BOIL BEHIND ME!
Tried reducing amps
increasing flow rate - reducing rate. slowing down, speeding up
went to larger cup size.
Arrrg!!!!
Used almost a whole 60CF bottle of gas this afternoon trying to figure this
out and,............
Wait for it....
I'm absolutely sure I doing something stupid.
Recommendations welcome. THANKS!
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