carbon steel to ductile iron

[MACH4]

I was asked to weld a 3' pipe and flange to an existing pipe, no problem there right. Then the guy tells me that the other pipe is "ductile iron" and I really am not sure of what it is. I've welded cast iron together with good results and I've welded cast to carbon but, I'm not sure about "ductile iron"! !
If anyone can give me any help on this I would really appreciate it!!!!!!!!!
Mike
MACH4

[HAWK]

MACH4,

I welded a 4" carbon steel pipe to a ductile iron barrel on a post indicator valve. I used 55% nickel rods and burned them on 60% dig setting to help wet out the puddle. There is minimal stress on the joint and it is holding up fine. I noticed good penetration when welding because I was worried that it would not burn in good on both materials (DI and MS). Maybe I was lucky or maybe it just works. If there is much stress on this joint or if it is structural, then I am not sure what would do well. I hope this helps.

[MACH4]

Hawk,
Got your reply,thanks. Did you do this stick or tig??I'll be using the Bobcat 225 or the 200DX.
Mike
MACH4

[Paul Seaman]

I welded a crack in a ductile iron 9" ford differential case using Ni99 stick at 150 amps. The crack was stop drilled at the ends and v grooved to aid penetration. Two passes and it was fabulous, never leaked until it met the wall at 100mph and the diff housing exploded and the gear housing shattered. This material is tough but it doesn't flex- it shatters.

Peace,

[HAWK]

MACH4,

I utilized the adjustable dig feature on the Maxstar 200DX to burn a 3/32" NI 55 stick (SMAW). I powered the Maxstar 200DX from a Bluestar 180 5KW generator. I did this rather than burn the stick on the Bluestar so I could have the dig feature of the Maxstar. Your Dynasty 200DX will do the same thing.