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 |