Material: lead free crystal
ROHS & REACH compliant
| Physical properties | density | 2.54-2.66 g/cm3 |
|---|---|---|
| color | black, not see through | |
| composition | SiO2 70% | |
| Na2O + K2O 19% | ||
| Others CaO MgO Al2O3 | ||
| MnO Cr2O3 Fe2O3 | ||
| max working temperature | 300 °C | |
| Thermal properties | strain point | 503°C |
| softening point | 591 °C | |
| Mechanical properties | hardness | 619 kg/cm2 |
| young’s modulus | 6.6 105 kg/cm2 | |
| compressive strength | 9250 kg/cm2 | |
| tensile strength | 824 kg/cm2 | |
