Chemical property :
SiO2% |
Al2O3% |
Fe2O3% |
CaO % |
K2O % |
Na2O % |
MgO % |
H2O % |
68~74 |
±12 |
0.5~3.6 |
0.7~1.0 |
2~3 |
4~5 |
0.3 |
2.3~6.4 |
Physical property :
Terms |
A |
B |
C |
Specific Gravity |
2.26 |
2.4 |
2.32 |
Hardness(HV) |
648 |
643 |
652 |
Expansion Rate |
K0≥15 |
K0≥15 |
K0≥18 |
Expa-temperature(℃) |
1000-1200 |
1050-1250 |
1200-1300 |
Pre-heating (℃) |
300-400 |
300-400 |
350-420 |