Home Al-Si Series Brick Common High Alumina Brick.

Common High Alumina Brick.

Common High Alumina Brick.

The term High Alumina Brick refers to refractory brick having an alumina (AI2O3) content of 47.5% or higher. This descriptive title distinguishes them from brick made predominantly of clay or other aluminosilicates which have an alumina content below 47.5%.
High-alumina brick are classified by their alumina content according to the following ASTM convention. The 50%, 60%, 70% and 80% alumina classes contain their respective alumina contents with an allowable range of plus or minus 2.5% from the respective nominal values. The 85% and 90% alumina classes differ in that their allowable range is plus or minus 2% from nominal.

OSYMEN BRAND

Al2O3

Fe2O3

AP

BD

CCS

PLC

RUL, Ta

1450oCX2hrs

1500oCX2hrs

%

%

%

g/cm3

MPa

%

%

oC

HA-50

50.0

2.5

26.0

2.20

40.0

0.4~0.1

 

1420

HA-55

55.0

2.0

25.0

2.35

45.0

0.4~0.1

 

1450

HA-65

65.0

1.7

24.0

2.40

50.0

0.4~0.1

 

1500

HA-70

70.0

1.5

23.0

2.50

55.0

0.4~0.1

 

1510

HA-75

75.0

1.5

22.0

2.70

60.0

 

-0.4~0.2

1520

HA-80

80.0

1.2

20.0

2.80

70.0

 

-0.4~0.2

1530

HA-85

85.0

1.2

19.0

2.90

80.0

 

-0.4~0.2

1540

AP: Apparent Porosity   |  BD: Bulk Density  |  CCS: Cold Crushing Strength  |  RUL: Refractories Under Load  |  PLC: Permanent Linear Change

Last updated: 2024-01-03
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