Material

SiO2 :30~40% ;AI2O3:55~65%; R2O:~2%;RO :4~8%

Compression strength

>100kg/cm2

2kg softening point under load

1350C

Refractoriness 

1750C

The max temperature

1300C

Unit

SHSM90

SHSM65

SHSM60

Content of al2o3

%

75-77

78-80

77-78

Density

g/cm3

2.6-2.7

2.5-2.6

2.4-2.5

Water absorption

%

6-7

8-9

9-10

Bending strength

MPa

60-70

55-60

50-55

Thermal Expansion coefficient(20-1000°C)

1/K

6*10-6

6*10-6

6.2*10-6

Elasticity

GPa

95

80

70

Using limit

°C

1350

1300

1300

Resistance to temperature change performance

very good

very good

very good