Al2O3 （%）≥

60

50

45

40

Fe2O3 (%)≤

1.5

1.8

1.8

1.8

（g/cm3）≤ Bulk density (g/cm3) ≤

1.0

1.0

0.8

0.6

(%)≥ Apparent porosity (%) ≥

65

65

70

75

≤ 2 %

Permanent linear change after heating ≤ 2 %

Test temperature

1510℃ ×12h

1400℃ ×12h

1350℃ ×12h

1250℃ ×12h

（MPa）≥

Cold compressive strength (MPa) ≥

4.0

3.5

2.5

1.5

（0.05 MPa，0.5%）

Refractoriness under load

(0.05MPa，0.5%)

1350

1250

1200

1050

（W/m·k）

（ 350±25℃)≤

Thermal conductivity (W/m·k) (Average

temperature 350±25℃ ) ≤

0.45

0.45

≤ 0.35

≤ 0.25

Application

For High-

temperature

Flues

、

For Building

Peripheral Walls,

Furnace Bottom

、

For Building

Peripheral Walls,

Furnace Bottom

For Building

Peripheral Walls