[TheForge] disintegrating welding rod

[Justin Fellenz]

Ah, yes, of course. That fits with the failure pattern. Duh.

Thanks Ralph.

JRF

--- Ralph Sproul <brhlbsmt at mcttelecom.com> wrote:

> Justin, I found unless you do a full penetration weld the material on
> the
> inside that is not welded stays put (the core) then the skin moves
> around
> it - stretches and will make most welds fail.  On something like 2
> 1/2" bar,
> your tig is maybe penetrating 1/8 - 316 of an inch....... That would
> certainly come apart unless you V'd it to the center and worked your
> way
> out.
> 
> Ralph
> 
> ----- Original Message -----
> From: "Justin Fellenz" <sunironworks at yahoo.com>
> To: <mspencer at tallships.ca>; "Sponsored by ABANA"
> <theforge at mailman.qth.net>
> Sent: Tuesday, December 21, 2004 6:19 PM
> Subject: [TheForge] disintegrating welding rod
> 
> 
> > All,
> >
> > I've been finding that electric welds, especially tig, disintegrate
> in
> > the forge. Last session I cheated and tigged a couple of pieces of
> bar
> > together rather than forge-weldng them. I used a general purpose
> mild
> > steel gas welding rod (probably RG-45, copper coated) and 2 1/2"
> round
> > bars of 1018 or 1020, or, my supplier said, maybe a38. I cleaned
> the
> > rods up with a flap wheel, beveled the edges, and burnt em
> together.
> > Looked like good penetration,a little sparking from junk on the
> metal
> > but not too bad. But when I heated it up and beat on it with a
> hammer,
> > the filler just sort of diappeared leaving gaps between the bar
> ends.
> >
> > Maybe I didnt get it all the way clean and carbon or scale deposits
> or
> > whatever heated up and blew the filler or the HAZ metal out. My
> best
> > guess. Anyone else experience this? I find that mig welds hold up
> ok as
> > long as the penetration's really good, but where it's not it looks
> like
> > the HAZ again just kind of powders and the bead pulls away from the
> > bar.
> >
> > Thoughts?
> >
> > Cheers,
> >
> > JRF
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