fire brick (or whatever its called)

[petertha]

I am happy to report I found what I was looking for at a local ceramics supply place.
http://www.ceramicscanada.net/

I think what I got was the 70% alumina for ~9$/brick. They were kind of fuzzy on spec sheet, but did mention metal heads request this for making forges etc.
http://www.sheffield-pottery.com/LVA70-70-ALUMINA-STRAIGHTS-2-5-p/lva70.htm

Its very light density. Apparently you can cut the stuff with hacksaw blade, so I might try that just to see. I was thinking of making a U channel in one brick & position a plain brick on top as a roof as a simple 2-brick configuration to heat small stuff like drill rod tools. Anyway I'll give it a shot & report back. Thanks for the links & info.

 

[deverett]

I am happy to report I found what I was looking for at a local ceramics supply place.
http://www.ceramicscanada.net/

I think what I got was the 70% alumina for ~9$/brick. They were kind of fuzzy on spec sheet, but did mention metal heads request this for making forges etc.
http://www.sheffield-pottery.com/LVA70-70-ALUMINA-STRAIGHTS-2-5-p/lva70.htm

Its very light density. Apparently you can cut the stuff with hacksaw blade, so I might try that just to see. I was thinking of making a U channel in one brick & position a plain brick on top as a roof as a simple 2-brick configuration to heat small stuff like drill rod tools. Anyway I'll give it a shot & report back. Thanks for the links & info.

I've found that over time (several years) that these type of bricks crack and I end up with several small pieces. Not really a problem in small quantities because the bits can be used to support the object being soldered/brazed off the hearth floor. Another use for the bits is pack round/in the parts being brazed to reflect the heat back to the metal. Especially useful where copper or brass is involved.

Dave
The Emerald Isle