[TheForge] oxy/acet welding 1 1/2" square

Sat Jan 26 20:07:11 2002

Thanks Pete.  Do you know at what temperature a braised joint would come
apart?
For example, would a braised joint holdup in a fireplace? RW

----- Original Message -----
From: Peter Fels and Phoebe Palmer <[email protected]>
To: <[email protected]>
Sent: Saturday, January 26, 2002 1:31 AM
Subject: Re: [TheForge] oxy/acet welding 1 1/2" square

> At 07:14 AM 1/25/02, you wrote:
> RW, for this sort of thing  , I'll often preheat with a rosebud ( a multi
> flame torch tip) then switch to a welding tip. Yes, the right size tip is
a
> necessity  . Yup that big stuff sure can suck a tank dry fast. There is a
> limit to how much acet will come  out of the acetone it is dissolved in
per
> hour....especially on smaller tanks it is necessary to keep track.
> Sometimes it is more cost effective to braise joints like that if you dont
> have a buzz box......Pete
>
>
>
> >Thanks Peter.  The next time I want empty my 74 cu ft acetylene tank
(after
> >its refilled), I will try it again per your advice.  I also believe I
need
> >the right size tip next time.
> >RW
> >----- Original Message -----
> >From: Peter Fels and Phoebe Palmer <[email protected]>
> >To: <[email protected]>
> >Sent: Thursday, January 24, 2002 10:55 PM
> >Subject: Re: [TheForge] welding 1 1/2" square
> >
> >
> > > RW: Sure...lots of little stringer beads.
> > > That is a pretty big bead to be practical for oxy acet but it can be
done,
> > > economics be damned.
> > > First, V out the weld all the way around so you can get good
penetration.
> > > Next enclose the pieces to be welded in fire-bricks below and on both
> > > sides. That will contain the heat to a great degree. Sometimes , if
you
> > > have almost enough heat to wet the surfaces of the base metal, but not
> > > quite enough, Heat as hot as you can get it  and  turn up the acet so
a
> > > feather of unburned  fuel shows  around the inner cone of the flame.
This
> > > will introduce some extra carbon to the surface of the metal and lower
> >it's
> > > melting temperature enough to look wet and  thus get the weld to
stick.
> > >
> > >
> > > At 05:31 AM 1/24/02, you wrote:
> > > >Is it possible to butt weld 1 1/2" solid mild steel with a 230 amp
max.,
> >AC
> > > >220v welder?
> > > >It does not need to be a "structural weld", just to hold a fireplace
> >grate
> > > >frame together.
> > > >I tried it with a #7 oxy/acet tip which is for 1 1/4" max and it is
not
> >much
> > > >better than if I had used chewing gum.
> > > >RW
> > > >
> > > >
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