| ITEM | TC-1 | TC-2 | TC-3 | TC-4 | TC-5 | TC-6 | |
| Al2O3,% | ≥70 | ≥70 | ≥65 | ≥65 | ≥65 | ≥60 | |
| SiC+C,% | ≥15 | ≥15 | ≥10 | ≥10 | ≥10 | ≥8 | |
| Bulk density，g/cm3 | ≥2.8 | ≥2.8 | ≥2.7 | ≥2.7 | ≥2.6 | ≥2.5 | |
| Cold crushing strength，MPa | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | |
| Bending strength,MPa | 110℃×24h | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 |
| 1450℃×3h | ≥8 | ≥8 | ≥8 | ≥8 | ≥8 | / | |
| Linearing changes on reheating(1450℃ × 3h),% | ±0.5 | ±0.5 | ±0.5 | ±0.5 | ±0.5 | ±0.5 | |
| Application | Main runner | Swinging runner | Branch runner | Slag runner | Coyer of main runner | Cover of slag runner | |