¡¡Chemical and Physical Properties		¡¡                                              Fireclay Bricks
		CH-1		SF-35		SF-34		SF-32
		Spec	Typical	Spec	Typical	Spec	Typical	Spec	Typical
Chemical Analysis (%)	Al2O3	38¡Ü	40	42¡Ü	46	40¡Ü	43	34¡Ü	35
	Fe2O3	2.0¡Ý	1.7	1.5¡Ý	1.2	1.5¡Ý	1.2	2.0¡Ý	1.3
Refractoriness (SK)		34¡Ü	34	35¡Ü	35	34¡Ü	34	32¡Ü	32
Bulk Density		2.20¡Ü	2.30	2.30¡Ü	2.33	2.25¡Ü	2.32	2.15¡Ü	2.20
Apparent Porosity (%)		20¡Ý	17	17¡Ý	13	17¡Ý	15	17¡Ý	15
Cold Crushing Strength		350¡Ü	450	500¡Ü	700	500¡Ü	650	400¡Ü	500
(Kg/cm2)
Thermal Expansion (%)		-	0.57	-	0.58	-	0.56	-	0.60
at 1000¡æ
Permanent Linear Change (%)		-	0.2	-	1500¡æ 0.2	-	1500¡æ 0.2	-	0.2
at 1350¡æ ¡Á 2Hrs
Refractoriness under Load		-	1,400	-	1,500	-	1,500	-	1,400
(2Kg/cm2, T2¡æ)				¡¡