Cast to steel

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I had these dropped off to weld the steel dividers in the cast housings.First, grind off the bark.  NOTICE the sparks from cast iron.  They only travel about a foot.Now some preheat to about 400* F using an infrared thermometer.Here is the final productand a close up of the cast welds.NI55, 100 amps arc force all the way up.Real world weldin.  When I grow up I want to be a tig weldor.
Reply:And?Way to go Dave!Nice demo....zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:good work... but what are they for? look pretty heavy-dutyLater,Andy
Reply:They are covers for A heat exchanger of some kind.  The dividers go between the tubes.  He said if it works he will order the castings like that.He had marks and gave me 1/16" to work with.  They are a little warped even though I alternated sides and worked from the center out.  I  think if I preheated the dividers too, it would help keep em straight.So I guess I made a prototype.Today we unloaded 2 small skids of pipe and flanges.  80 to 100 of each.  I have to bid the job.  You will see em.David Real world weldin.  When I grow up I want to be a tig weldor.