Brick info please

[dk dogs]

I found this brick and was hoping someone might be able to help with the history of it? I found a lot of info on A.P. Green bricks but none with numbers on them like this. If you can please provide any info as to the numbering importance on this brick that would be great.
Thanks!
Dave

 

[ojm bc]

may be material in it? as to fire resistence 60-60?

There are other brands of refractories available as well as other types of refractories. This hasn't been an ad for A. P. Green, these are simply the materials I've been using and am familiar with. If you go below the 60-65% alumina range, the refractory will react with the sodium to form glaze on the interior and eventually deteriorate. If you go above 60-65% range you will have problems with porosity as well as increased cost. There is a KX-99 brick that A. P. Green makes that is about their densest high temperature brick but it's been cracking because it can't take quick firings and coolings that studio potters practice(google)

 

[Aarong81]

ojm, I think it says 60-69 if it makes a difference.

 

[Ant]

I think the numbers represent a lot number and date, this was a east search, AP Green Brick Company info at this link;

http://www.cardcow.com/215134/p-green-fire-brick-company-mexico-missouri/

 

[ojm bc]

n/t

 

[ojm bc]

n/t