Karakteristik:
1.Higher tanpere reziste ak bon refractoriness
2.Bon pèfòmans nan refractoriness tanperati ki wo anba chaj
3.Excellent rezistans nan fwotman salop
4.Pi wo dansite esansyèl
5.Lower porosite aparan
6.Lower kontni enpurte
| Atik | Klas 91 | Klas 92 | Klas 93 | Klas 94 | Klas 97 |
| MgO, % ≥ | 91 | 92 | 93 | 94.5 | 97 |
| SiO2, % ≤ | 4 | 3.5 | 2.5 | 2 | 2 |
| Fe2O3, % ≤ | 1.3 | – | – | 1.2 | 1.2 |
| CaO, % ≤ | 2.5 | 2.5 | 2 | 1.8 | 1.8 |
| Porosite aparan, % ≤ | 18 | 18 | 18 | 18 | 18 |
| En Dansite, g/cm3 ≥ | 2.86 | 2.9 | 2.95 | 2.92 | 2.95 |
| Fwad kraze fòs Mpa, ≥ | 60 | 60 | 50 | 60 | 60 |
| 0.2Mpa refractoriness Anba chaj T0.6 ℃ |
≥1570 | ≥1560 | ≥1620 | ≥1650 | ≥1700 |
| Rezistans chòk tèmik 100 ℃ sik dlo | ≥18 | ≥18 | ≥18 | ≥18 | ≥18 |