Al₂O₃%

>45

SiO₂%

40

Fe₂O₃%

                          <1.0

                                         Cao%

1.7

Normal temperature the flexural strength MPa

1.0-1.3

Volume density %

0.52-1.25

Normal temperature compression strength MPa

1.2-3.4

Softening temperature °C

1250

Thermal shock stability (water) times / 1000 degrees air cold

>15

Coefficient of thermal conductivity W / (m.k) 350 degrees +-10 degrees

-1

Heavy burn line change %

-1

1300*12h

The highest use ° C temperature

1230-1760