mullite Insulation bricks JM/GM26

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      Items

JM20

JM23

JM26

JM28

JM30

Maximum Working Temp.

1100

1260

1430

1540

1650

Bulk Density, g/cm3, min

0.45

0.48

0.78

0.88

1.02

C. C. Strength, Mpa, min

0.8

1.1

1.6

2.1

2.5

Cold Bending Strength, Mpa, min

0.7

0.9

1.4

1.8

2.0

Linear Change after Reheating, %

24 hr, max

1080

1230

1400

1510

1620

0.1

0.2

0.2

0.2

0.5

Al2O3 content, min

35%

37%

56%

67%

73.4%

Fe2O3 content, max

0.8%

0.7%

0.7%

0.6%

0.5%

Thermal Conductivity

W/m.k

260

0.12

0.14

0.32

0.33

0.41

540

0.44

0.16

0.34

0.35

0.43

815

0.36

0.37

0.44

Thermal Shock Stability (times)

from 1000, by cooling air

20

30

30