If you had welded it cross ways rather than length ways you would have likely had different results. SS welds cast well, but has very little flexability. Even with preheating a crack beside the weld would likely happen. The shape of a cast iron piece is the most important fact to take into account when picking a filler material.
Re: Mig Welding Cast Iron with Stainless Wire (Video) in reply to DKase, 04-12-2013 10:50:20
I agree, If the manifold had been broken completely off on one cylinder, and that is the way most of them break, and it was welded completely around, when put back in service and it comes up to temperature and cools back off 90% of the time it will crack again in the heat affected zone about 1/4 in. beside the weld. Ask me how I know. BTDT. I do not arc weld manifolds any more.
Re: Mig Welding Cast Iron with Stainless Wire (Video) in reply to welding man, 04-12-2013 14:27:28
I agree,welding manifolds with any type of arc is not a good idea. After he gets 15 or 20 years experience , he will want to get acquainted with a torch cast rod and flux ,and have a pile of fire bricks to build an oven.
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