Some typical specifications of Indian refractories commonly used in the furnaces and kilns in steel, cement, non-ferrous metals and glass industries are given blow. These are illustrative and do not cover the full range of products and some of the improved items which have been recently developed.

DIRECT BONDED BASIC BRICKS
CHEMICAL PROPERTIES
MgO (%) (Min)	60	57	55
Cr 2 O3 (%) (Min)	16	21	18
SiO 2 (%) (Max)	3	2.5	1.5
PHYSICAL PROPERTIES
A.P. (%) (Max)	18	18	18
C.C.S. (kg/cm²) (Min)	400	500	400
RUL (ta°C) (Min) (2 kg/cm²)	1700	1750	1750
MOR (kg/cm²) (Min)
at 1400°C	0	100	0
at 1500°C	40	0	40
Application	AOD, OTB & VOD wear lining

MAGNESIA CARBON BRICKS
CHEMICAL PROPERTIES
MgO (%) (Min) in SWM as used	97	97	97	97
Fired Carbon (%) (Min)	5	8	12	18
PHYSICAL PROPERTIES
A.P. (Vol. %) (Max)	5	5	5	5
B.D. (gm/cc) (Min)	3	2.95	2.90	2.85
C.C.S. (kg/cm²) (Min)	500	500	400	300
MOR (kg/cm²) (Min) at 1400°C	90 - 120	90 - 120	90 - 100	90 - 100

BASIC BRICKS FOR GLASS INDUSTRIES REGENERATORS
CHEMICAL PROPERTIES
MgO (%) (Min)	88 - 90	94	97.5
Fe 2 O3 (%) (Max)	0.8	1.6	0.2
CaO (%) (Max)	2.5	1.9	1.5
SiO 2 (%) (Max)	6.5	2.8	0.7
PHYSICAL PROPERTIES
B.D. (gm/cc) (Min)		2.85	2.95
A.P. (%) (Max)	20	18	17
C.C.S. (kg/cm²) (Min)	350	500	450
PCE (SK) (Min)	38	40	42
RUL (ta°C) (Min) (2 kg/cm²)	1550	1650	1700
PLC (%) (Max) at 1600°C for 2hrs.	0.5	0.5	0.5

BASIC GUNNING MATERIAL
CHEMICAL PROPERTIES
MgO (%) (Min)	85
Cr 2 O3 (%) (Min)	0
PHYSICAL PROPERTIES
Refractoriness (SK) (Min)	38
PLC (%) after firing to 1550°C for 2hrs.	-1.5
CCS (kg/cm²) (Max) after firing to 1500°C for 2hrs.	200
Grading (mm)	0-3
Application	BOF, EAF

BASIC RAMMING MASS
CHEMICAL PROPERTIES
MgO (%) (Min)	95	87
Fe 2 O3 (%) (Max)	0.2	6
SiO 2 (%) (Max)	2	4
PHYSICAL PROPERTIES
Setting	Chemical	Chemical
Sintering temp. (°C)	1550	1200
Grading (mm)	0.5	0.8
Application temp. (°C)	1750	1750
Application	Special low Silica high MgO compound for ramming or vibro-casting Especially suitable for ramming tap holes of BOF	Dry ramming mass for EBT-UHP-EAF bottom