[TheForge] Re: Porous Cast Iron

[Larry Brown]

The porousness should not extend through the piece. Watch HD's Chinese 
fittings, a lot of bad castings with holes. Usually the metals, iron, cast 
iron and steel will hold a certain amount of moisture in their surfaces. I 
have seen water bubble up and run from an acetylene torch when cutting cold 
plate and the same when heating cast iron to repair it.



At 03:07 PM 3/24/2008 -0600, you wrote:
>Seems that if cast iron were truly porous, it would be useless for pipes.
>
>CraigS
>Gresham, OR
>
>
>
>
> >From: Andy Gladish <gladish at cablerocket.com>
> >Date: 2008/03/24 Mon PM 01:57:27 CST
> >To: Sponsored by ABANA <theforge at mailman.qth.net>
> >Subject: Re: [TheForge] Re: File Making
>
> >On Mon, 24 Mar 2008 12:37:08 -0700, <schade at acegroup.cc> wrote:
> >
> >>
> >> On Mar 24, 2008, at 1:51 PM, Jeffrey Polaski wrote:
> >>>
> >>> Are there any guide lines on how much a hunk of steel can absorb?
> >
> >> zip, nada, none, zero, zilch, nil
> >>
> >> bob
> >
> >I don't know about that- I regularly dry steel out as part of the preheat
> >before welding- I know some of what appears to be water coming out is
> >actually condensation but I don't think that's all of it. Cast iron is
> >certainly porous.
> >
> >--
> >Andy Gladish, Metal Work
> >Element Forge
> >www.ElementFe.com
> >Email:  andy at elementfe.com
> >Portfolio @  elementfe.carbonmade.com