| Modifier | σВ | σ0,2 |
| δ | ψ |
| KCV, J/сm2 at Т, ˚С | ||||
| MPа |
| % |
| +20 | 0 | −20 | −40 | −60 | |||
| 0 | 693 | 605 | 14 | 49 | 97 | 87 | 75 | 53 | 37 | ||
| Al2O3 | 728 | 621 | 17 | 54 | 82 | 58 | 50 | 36 | 22 | ||
| MgO | 644 | 586 | 19 | 60 | 103 | 85 | 69 | 60 | 34 | ||
| ZrO2 | 622 | 533 | 19 | 65 | 120 | 107 | 73 | 65 | 41 | ||