[TheForge] Re: Burning Metal

Wed Nov 5 07:32:01 2003

Thanks Pete, that gives me a base line to try it out on.  I have some broken
cast sections(legs and frames) with radiating fractures.  I'd like to remove
and put sawn in sections from cast plates I have.  This is an interesting
solution.  I also have plasma and carbon arc torches to play with so it
should be a fun project testing all these out .....just after a rainy day of
course down in the field where this all lays in wait.

Ralph
----- Original Message -----
From: "Peter Fels And Phoebe Palmer" <[email protected]>
To: <[email protected]>
Sent: Wednesday, November 05, 2003 12:18 AM
Subject: Re: [TheForge] Re: Burning Metal

>
>
> Hi Ralph:
> It depends on how much extra heat you need to sustain the cut, which is
> to say, how thick the cast iron is. My recollection is using 1/2" scrap
> to fuel  a cut in 3/4" cast iron and it was a ragged cut. Could be it is
> more controllable with practice....Pete F
>
> Ralph Sproul wrote:
>
> >Hi Pete, That's an interesting idea - I've never tried that, but would
like
> >to.  Do you use something light like 1/4" or does it take 1/2 to keep the
> >oxidizing stream going?
> >
> >Ralph
> >
> >----- Original Message -----
> >From: "Peter Fels And Phoebe Palmer" <[email protected]>
> >To: <[email protected]>
> >Sent: Monday, November 03, 2003 9:13 PM
> >Subject: Re: [TheForge] Re: Burning Metal
> >
> >
> >
> >
> >>One can use a sacrifice piece of steel to sustain a torch cut  in cast
> >>iron..carbon isn't the critical factor..plain iron seems to be...PF
> >>
> >>Andy Gladish wrote:
> >>
> >>
> >>
> >>>>I think if the carbon content was the accelerating factor, cast
> >>>>iron should
> >>>>cut easily.
> >>>>The  best I can do on cast iron with an O/A torch is a very sloppy
cut.
> >>>>My plasma torch however cuts it easily.
> >>>>chuck-
> >>>>
> >>>>
> >>>>
> >>>>
> >>>I think that what is happening when I use an O/A torch to cut cast iron
> >>>
> >>>
> >is
> >
> >
> >>>that the preheat is melting the metal and the oxygen jet is blowing it
> >>>aside. Way different from the sharp, clean cut (burn) I get with steel
> >>>
> >>>
> >when
> >
> >
> >>>things are set up correctly.
> >>>So, a torch will 'cut' things that it can't 'burn'.
> >>>Andy G.
> >>>
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