Fire Bricks

Characteristic	Grade A [KRI-A]	Grade B [KRI-B]	Grade C [KRI-C]
Bulk Density (gm/ss, max.)	1.00	0.90	0.75
Cold Crushing Strength (kg/cm², min.)	60	60	65
Pyrometric Cone [ASTM] No. (min.)	32	27
Suitable for Temperatures up to (°c)	1500	1250	850
Thermal Conductivity at Hot Face temperature of 600°c (kcal/m/hr/°Cmax)	0.35	0.23	0.20
PLCR (°C/3 hours, max.)	±102 at 1250°C	±1.5 at 1200°C	±1.5 at 1000°C

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