[TheForge] cast iron welding

Sat Mar 20 00:41:04 2004

Ralph,
  The rod I've used is just called "cast iron rod".  It's square, fairly
rough-finished and bare (no flux).  I'm pretty sure that the flux I used
with good success was a Peterson's brand...I can check the specifics if you
need them.  Preheat to 400 F., weld, post-heat, peen lightly, cool slowly.
Cast iron is a bit different than gas welding steel, the puddle is much more
sluggish (the flux helps this, but doesn't completely cure it)- I think that
I read somewhere that it has to do with the oxides melting at a higher temp
than in steel(?)  I've also had good results with arc welding with Ni rod -
and unless a color match is needed, that's my preferred approach.  I've
welded cast with TIG as well, using both SS (ER-310) and one of the Ni rods
(Monel...?).

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Ralph Sproul
Sent: Friday, March 19, 2004 9:29 AM
To: [email protected]
Subject: Re: [TheForge] cast iron welding

        John, What is the cast rod called for torch welding? is there a name
or alloy to it?

        I wanted to experiment with the Tig as well.  What rods will work
with the Tig welder on cast iron?  anyone have any good input on this?

Ralph