Corundum brick

GY-99A

GY-99B

GY-98

GY-95

Al2O3 ≥

%

99

99

98

95

SiO2 ≤

%

0.15

0.2

0.5

-

Fe2O3 ≤

%

0.1

0.15

0.2

0.3

Apparent porosity ≤ 

%

19

19

19

20

Bulk density ≥

g/cm3

3.20

3.15

3.15

3.10

Cold crushing strength ≥

Mpa

80

80

80

100

Refractoriness under load ≥

℃

1700

1700

1700

1700

Permanent linear change

%

±0.2

±0.2

±0.2

±0.3