Why can't cast iron be welded while cast steel can be welded?
The cast iron can be welded, but the welding effect is not as good as the steel with lower carbon content under 30. Cast iron welding needs preheating and requires similar cast iron electrode or stainless steel electrode. Cast steel welding is also not rolled, the following 30 steel welding solid, and welding needs preheating.
There is no saying that it can not be welded. The weldability of grey cast iron and nodular cast iron in cast iron is very good. Times are different. Take a look at it more!
Because cast iron contracts very fast, easy to crack, welding is not strong, so it is generally not welded.
