[TheForge] Welding Cast Iron

[Woolley]

Phil,

I may be late on this thread but I stick weld cast iron with high nickel
content DC rod.  There are two rods where I buy it.  I'm pretty sure they
are Ni55 and Ni99.  I use the 99 for most stuff although I don't do a lot of
cast welding.  You must preheat, weld, then let air cool under a blanket if
possible so it cools slowly.  If you have cracks in sections, make sure you
drill a hole at the end of the cracks so it doesn't run when you weld it.
I've used TIG for ductile iron but only when cladding.  That's not to say it
can't be done.  Cast rod is pricey.  Good luck

Regards,
Bill Woolley


---- Original Message -----
From: "Phil" <mobjak at yahoo.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Thursday, April 14, 2005 7:40 AM
Subject: [TheForge] Welding Cast Iron


> I was wire brushing a piece of 1" square with the
> pedestal grinder yesterday evening.  The grinder
> grabbed the piece of 1" square.  I don't know exactly
> what happened (it happened too quickly), but the next
> thing I know, there was a big BANG, and the piece of
> 1" square was laying on the floor.
>
> Somehow, the work support bracket got cracked.  It's
> cast iron.  I looked around for some nickel ARC
> welding electrodes, and I either lost them (which is
> easy in the shop) or I had used them all.
>
> My question is this, is it better to ARC weld or TIG
> weld cast iron?  And, what process do you recommend?
>
> Thanks
>
> Phil Rosche
> Summerville, SC
>
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