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I Forge Iron

Alumina Shelf Opinions, pls !


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On 6/13/2017 at 5:03 AM, Latticino said:

Will be interested to hear the feedback from the manufacturer.  From my limited experience with high alumina castings I think you may end up having a problem with the relatively rapid thermal cycling potentially cracking the high alumina tile, depending on your installation details, use and forge design.  The high alumina castings I've used didn't like any kind of quick temperature changes. A crack is not as big a deal for a forge floor as it might be for the walls or ceiling, if either are used for the forge structure support.  

3000 F rated high alumina kiln shelves are much tougher than high alumina refractory, because they are baked at very high temperatures for long periods, just to make them tough. This is why I prefer them for any forge area likely to be impinged by burner flame; never had any cracking with one of them. That said, I have never had a crack in a casting furnace hot face made with Kast-O-lite 30 either. Still, I think that 1/4" thick refractory walls would be pushing the bounds of good sense.

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