so im about to weld a on a cast iron manifold. i know i should be using its rod for welding on it but what if i just used Carbon Steel wire instead?

 

cast iron requires a nickel rod SMAW process or a fusion weld where a oxy/acetalene flame is used to meld the new cast filler in and fuse the two parts together.

other then that its not recomended

 

the one time that i have welded on cast iron i preheated the area being welding and used mild steel rod, using a tig welder of course.

 

nickel.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ladyfriend &raquo;</TD></TR><TR><TD CLASS="quote">cast iron requires a nickel rod SMAW process or a fusion weld where a oxy/acetalene flame is used to meld the new cast filler in and fuse the two parts together.

other then that its not recomended</TD></TR></TABLE>

ohok. well then looks like i might have to wait to take it to work and have it done there.

 

you can get nickel rod for gtaw as well. **** I think I've even seen mig wire. If might have been for copper though.

 

Use hastelloy if you can, if not 309l works in a pinch just do a really long post heat.

 

I will only weld to cast if need be for mounting a bracket or something not terribly load bearing. regardless, i get best results heating it almost glowing red, then throwing a lot of heat at it while welding. thats mig btw.

 

I have welded some cast iron before. I used an old AC/DC stick machine with some high nickel rod. There's a few types of cast iron rod out there. Only the high nickel rod is machinable. It, however, is rather expensive, usually 20 bucks a pound or so. I also preheated with a rose bud tipped oxy-acetylene torch.