PropertiesGrade A
[GRMI -A]
Grade B
[GRMI - B]
Grade C
[GRMI - C]
Bulk Density (gm/cc)0.475 ~ 0.5300.570 ~ 0.6300.700
Apparent Porosity (%, min,)807572
Cold Compressive Strength (kg/cm2 min)7912
Thermal Conductivity
(kcal/m/hr/oC, max.)
400 oC0.110.140.16
600 oC0.140.160.175
800 oC0.160.1750.19
PLC (% at oC for 5 hours)-1.5 at 950 oC-1.5 at 1000 oC
Maximum Safe Working Temperature oC100010501050
Al2O3 (%)36
SiO2 (%)48
Fe2O3 (%)2

Note:

  • Provided above are average test data, subject to reasonable variations.

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