The first is about welding cast iron. I know that you need a DC Stick welder and that you need to preheat the joint to be welded, not so much as to melt it but enough so that the weld or the surrounding area does not crack when it cools. I also heard of Brazing being used also. Does all that seem correct so far? Are there any other methods and/or preperation I need to know about?
The second is about welding dissimiliar metals. I need to weld a 90 degree joint between stainless and mild steel, How is this done? I have a Hobart Handler 175 MIG welder, would this one work? If so, which wire do I use and any advice on voltage and wire speed would be appreciated.
Just to let everybody know, I am fairly new to welding. Thanks alot in advance.