1st attempt at stainless steel with O/A

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I had a 12x12" 16ga piece of stainless 304 that I wanted to practice on before the main event which is going to be an exhaust modification on my car.  I used a victor 100FC torch with a #0 tip and a 1/16th ER308L rod.  I used solar B flux and really liked how it helped out.  Before I had played with a couple of coupon with no flux and a R45 rod mainly just to see how stainless behaves since all prior welding has been done on mild steel. Is the black residue a sign that my mixture of Solar B flux was off or is that normal?  I only went over the welds with a SS brush. There is a small spot in the backside of the weld on the middle picture, its a shadow lol.  Thanks for looking.  My next goal is to weld aluminum Last edited by wtfmarine; 04-17-2015 at 04:29 PM.Reason: forgot to add somethingAHPTIG 200xO/A - Victor Torch Did you try using a hammer? What about duct tape? What about a bigger hammer?
Reply:Hmmm, there's something kind of nauseating about those welds SqWave 200Millermatic 190Airco 200 ACHypertherm PM45Boice-Crane Band SawVictor O/A
Reply:Not sure I follow lolAHPTIG 200xO/A - Victor Torch Did you try using a hammer? What about duct tape? What about a bigger hammer?