Sl. No.		High Alumina Brick
Al2O3,%		≥75	≥65	≥55	≥48
Refractroriness ℃		≥1790	≥1790	≥1770	≥1750
0.2MPa  R,U,L.℃		≥1520	≥1500	≥1470	≥1420
A.P. %		≤22		≤21
Liner Change %	1400℃×2h
	1350℃×2h
	1500℃×2h	+0.1 -0.4
	1450℃×2h				+0.1 -0.4
C.C.S. MPa		≥53.9	≥49.0	≥44.1	≥39.2