unshaped refractory
High-Strength High-Alumina Castable
| Grade | Al₂O₃ Content | Long-term Service Temp. | Typical Applications |
| 70G | ≥70% | 1450℃ | Heating furnaces, electric furnace flues, kiln-door enclosures, circulating fluidized beds, chutes, material ducts, wear-resistant linings of equipment; medium scouring and medium/high-temperature conditions, replacing ordinary high-alumina castable, positioned between ordinary high-alumina castable and corundum castable. |