Fire Clay Brick for Common Usage

 

Brand

SK-32

SK-34

SK-36

HA-60

HA-75

Al2O3(%)

≥30

≥38

≥50

≥60

≥75

Fe2o3(%)

≤3

≤2

≤1.5

≤1.5

≤1.2

Refractoriness

1710

1750

1780

1790

1800

refractoriness under load 0.2mpa()

1300

1350

1450

1600

1650

Porosity(%)

22

19-23

19-21

≤18

≤17

Bulk density(g/cm3)

≥2.1

≥2.2

≥2.3

≥2.35

≥2.45

Cold cushing strength (mpa)

≥25

≥30

≥50

≥70

≥80

Thermal expansion at 1000(%)

≤0.6

≤0.6

≤0.3

≤0.6

≤0.6