| Properties | HCR 18 | HCR.16 | LCR.14 |
| Max. Limited Temp. oC | 1800 | 1600 | 1400 |
| Material Required for Estimating (kg/m3) | 2850 | 2200 | 1850 |
| Chemical AL2O3 | 80 | 53 | 36 |
| Analysis SiO2 | – | 40 | 54 |
| Permanent 110oC X 3hrs | -0,03 | -0,06 | -0,12 |
| Linier 1350oC X 3hrs | -0,1 | -0,1 | -0,3 |
| Change 1500oC X 3hrs | -0,2 | – | – |
| Cold Crushing Strength (kg/cm2) | |||
| 110oC X 24hrs | 350-400 | 150-250 | 100-200 |
| 1000oC X 3hrs | 300-400 | 100-200 | 100-200 |
| 1350oC X 3hrs | 350-400 | 150-250 | 1250oC |
| 1500oC X 3hrs | 450-550 | – | 100-200 |
| Bending strength (Kg/cm2) | |||
| 110oC X 24hrs | 60-100 | 25-65 | 20-60 |
| 1000oC X 3hrs | 60-90 | 26-60 | 20-70 |
| 1350oC X 3hrs | 60-100 | 25-65 | 1250oC |
| 1500oC X 3hrs | 80-120 | – | 25-65 |
| Thermal Conductivity (Kcal/m,h,C) | |||
| 260oC | 0,93 | 0,67 | 0,52 |
| 540oC | 0,99 | 0,68 | 0,59 |
| 800oC | 1,04 | – | 0,63 |
| Water required for casting (%) | 8 | 10 | 13Castable |
