| ZAFCB-30 | ZAFCB-32 | ZAFCB-34 | ZAFCB-35 | |
| AL2O3 percent ( Greater than or equal to ) | 30 | 35 | 38 | 45 |
| Fe2O3 percent ( Less than or equal to ) | 2.5 | 2.5 | 2 | 2 |
| 30 | 32 | 34 | 35 | |
| Refractoriness under load, 0.2MPa, degree ( Greater than or equal to ) | 1250 | 1300 | 1360 | 1420 |
| 22-26 | 20-24 | 20-22 | 18-20 | |
| 1.9-2.0 | 1.95-2.1 | 2.1-2.2 | 2.15-2.22 | |
| 20 | 25 | 30 | 40 | |
1. Low coefficient of linear expansion
2. Low thermal conductivity,
3. Strong resistance to the acid slag erosion,
4. Excellent thermal shock resistance,
5. High Refractoriness under load,
6. Low high-temperature creep rate.
