| performance | Company | numerical value |
| purity | % | ≥92 |
| density | g/cm3 | 3.0-3.1 |
| tensile strength | Mpa | 2.7×10 |
| Bending strength | Mpa | 300-460 |
| compressive strength | Mpa | 275-280 |
| hardness | HS | 105 |
| Spring modulus | Gpa | 350-420 |
| Thermal conductivity | w/cm.k | 4.2 |
| Coefficient of thermal expansion |
| 4-4.5 |
| Heat resistant temperature (in the atmosphere) |
| 1600-180 |
| Coefficient of thermal shock | cal/cm.sec | 47 |
| Acid resistance |
| 3-5 |
| Poisson's ratio |
| 0.15
|
