Specifications for corundum low cement castable:

Product Index		Al2O3 90%	Al2O3 93%	Al2O3 95%
Chemical composition	Al2O3 % ≥	90	93	95
	SiO2  % ≤	3	1	1
	CaO  % ≤	2.0	1.8	1.8
Bulk density     g/cm3 ≥		3.0	3.1	3.2
Cold crushing strength  Mpa ≥	110℃×24h	50	80	80
	1100℃×3h	65	80	80
	1500℃×3h	70	80	80
Modulus of rupture   Mpa ≥	110℃×24h	6	7	7
	1100℃×3h	8	8	10
	1500℃×3h	8	8	10
Reheating linear change %	1100℃×3h	±0.2	±0.2	±0.2
	1500℃×3h	±0.3	±0.5	±0.5
Construction water  %		5~7	5-7	5-7
Max working temperature ℃		1700	1750	1750