MIG welding cast iron

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Just used my old lincoln 225 engine welder to weld a cast iron housing on my tractor using nickel rods from Muggy Weld.  They worked great.  However I would have liked to have done it with my Miller 200.  Is it practical to weld cast iron with a mig?  Do they make nickel wire for mig welders welding cast iron?
Reply:The purpose of wire feed is to do things faster.  Stick welding is more suitable for repair of cast because the welds are relatively small and specialized.  You are not running tens or hundreds of feet of weld.  I am sure there is a nickel based wire available but consider the cost for a spool of wire.  I once saw aluminum bronze wire on a MIG.  After the demo the guy released the rolls and wound the wire back to the spool.  The stuff is ideal for surfacing castings and repair sliding surfaces.  I was told the spool was worth around 500 dollars.
Reply:Iv'e done it with ER70s wire on non-structural pieces, it works great too. There will be a lot of splater, crazy things jumping out of the puddle, big balls of fire flying, but it can be done, and water tight too.....
Reply:I agree i used the same wire to fix my exhuast manifold it was broke into two pieces everyone said you cant fix that and if it does hold it wont last long two years later a case of beer on a bet and about 60.000 klms later she still looks the same as when i layed it down very possible.
Reply:I'm surprised a pre/ post heat process was not addressed. It's a good idea any time you weld cast, helps maintain ductility, especially in parts that go through heat/ cool cycles
Reply:Originally Posted by Robinson Welding I'm surprised a pre/ post heat process was not addressed. It's a good idea any time you weld cast, helps maintain ductility, especially in parts that go through heat/ cool cycles