项目 | 高铬砖 | 铬刚玉砖 | 铬刚玉砖 | 铬刚玉砖 |
Cr2O3% | ≥90 | ≥60 | ≥30 | ≥12 |
Al2O3% | -- | ≤38 | ≤68 | ≤80 |
Fe2O3% | -- | ≤0.2 | ≤0.2 | ≤0.5 |
显气孔率% | ≤17 | ≤14 | ≤16 | ≤18 |
体积密度g/cm3 | ≥4.3 | ≥3.63 | ≥3.53 | ≥3.3 |
常温耐压强度MPa | ≥100 | ≥130 | ≥130 | ≥120 |
荷重软化温度(0.2Mpa,0.6%)℃ | ≥1680 | ≥1700 | ≥1700 | ≥1700 |
重烧线变化率% | ±0.2 | ±0.2 | ±0.2 | ±0.2 |