With the metal thickness that you are using I would suggest using .030 wire or less. Your running just slightly cold for the size of wire but its to hot for the the thickness of plate, see your number 6 bead. The brown around it is an indicator. Also, you need to brace yourself, use both hands, and may need to add a cheater lenses to your hood, and adjust the shade setting to where you see the puddle the best.. Watch the stickout, leave it about 3/8" to 1/2". Gas should be set 10 to 15 cfh. Play with the gas and see what works best. Pushing and moving quicker will allow the bead to flatten some if your angle of your torch is correct. You may also use a scribe line that will allow you to follow a straighter line.
Risk Control Consultant, Boiler and Machinery
Boiler and Pressure Vessel inspector-National Board Commission
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