Cast iron

[Gingle]

Cast iron to steel,what stick rod do I need,and amps please, UK rods

 

[Erie Fred]

Need some more information about the part to be welded.

 

[Turbo]

309 or 312 nickel rod.

 

[Turbo]

Lovely rod to weld with

 

[Dcal]

As above, but high nickel cast iron welding rods should do it, they will weld steel fine and the malleable nature of the nickel stops the cast cracking in the HAZ.
They are expensive but an advantage over the stainless rods @Turbo recommended are they can be bought in small quantities.

 

[hotponyshoes]

I've used e312 before with no problems.
Think I've got an open box here if you want a small quantity rather than buying a whole box

 

[Tigman]

I'm going with a 312 !

 

[Brad93]

312 may stick but it's not the right rod for the job.

You want 50/50 NiFe or pure nickel electrodes.

 

[Memmeddu]

I've bought 309 for those occasions but be aware about the nature of the welding joint...
Steel and cast iron have different heat dissipation properties and they have different expansion rates.
So if it's not a critical component or something exposed to temperature variations like heating and cooling cicles, you should not have any problems even using regular stainless or at an extreme just 7018.
Otherwise you have to use NiFe rods because chrome in stainless rods reacts with carbon and manganese contained in both steel and cast iron creating an extremely hard alloy not machinable and most likely very brittle.
If you need to make an anti wear surface on a budget you can use a stainless and a 7018 rod together to get a pretty good result.
That's an example to better understand what I've said above