[TheForge] Strengthening castable refractory

Sun Aug 31 06:28:00 2003

Was that $50 for the needles? Mine cost $18 for 2 lbs, but I only used
maybe a few ounces. The refractory guy said that for 25 lbs of
insulating castable I only needed an 8-oz cup of them. Using
more wouldn't hurt, but didn't really help. 

-Marc

On Fri, 2003-08-29 at 22:21, Ed F wrote:
> Hi Chuck,
> 
> Have you ever broken a used forge, by chance, and seen if the ss needles
> survive repeated heat?  Maybe if they do burn out they still help avoid
> shrinkage cracks during curing.  I seem to remember that it would have been
> in the ballpark of $50 and I was kind of directed away from it at the time.
> 
> Ed
> 
> 
> ----- Original Message -----
> From: "Chuck Robinson" <[email protected]>
> To: <[email protected]>
> Sent: Friday, August 29, 2003 6:27 PM
> Subject: Re: [TheForge] Strengthening castable refractory
> 
> 
> > Hey Bruce,
> > My son just dropped off a box of the needles. Under the microscope they
> are
> > convex on one surface and concave   on the other.
> > The overall surface is also micro dimpled. I seriously doubt that they
> > could be duplicated using any kind of wire or tooling available to us, and
> I
> > sure wouldn't find the effort, cost effective.
> > $ 9 lb looks a lot more reasonable to me now.
> > Chuck

-- 
Marc <[email protected]>
-- 
Marc Godbout
http://www.ironringforge.com

New England Blacksmiths Membership Director
http://www.newenglandblacksmiths.org