| Brand Name: – | HR CRETE NORMAL | HR CRETE SUPER | HR CRETE LT | HR CRETE SPECIAL | HR BOILER PATCH | |||||
| Type | 45 % Alumina Castable | 70 % Alumina Castable | Low Temperature Castable | 60% Alumina Castable | 40 % Alumina Castable | |||||
| Nature of Bond | Hydraulic | Hydraulic | Hydraulic | Hydraulic | Hydraulic | |||||
| Installation | Vibration Casting | Vibration Casting | Vibration Casting | Vibration Casting | Patching Purpose | |||||
| Raw Material Base | Calcined Clay | Calcined Bauxite | Calcined Clay | Calcined Clay | Calcined Clay | |||||
| Max Service Temp. | 1400°C | 1450°C | 800°C | 1400°C | 1250°C | |||||
| Max Grain Size | 5 mm | 5 mm | 5 mm | 5 mm | 5 mm | |||||
| Water Required for Casting | 11-13% | 10-13% | 11-13% | 12-14% | 13-16% | |||||
| Chemical Analyses: – (%) | Typical | Specification | Typical | Specification | Typical | Specification | Typical | Specification | Typical | Specification |
| Al2O3 : | 46.0 | 45.0 Min | 70.80 | 68.0 Min | 31.0 | 30.0 Min | 60.25 | 60.0 Min | 40.20 | 40.0 Min |
| Fe2O3 : | 3.20 | 4.0 Max | 4.0 | 5.0 Max | 2.50 | 4.00 Max | 3.5 | 4.0 Max | 3.2 | 4.0 Max |
| CaO : | 5.50 | — | 6.0 | — | 13.10 | — | 6.0 | — | 7.5 | — |
| Physical Properties: – | ||||||||||
| B. D (gm/cc)
Drying at 110°C/24 hrs. |
2.15 | 2.10 Min | 2.52 | 2.50 Min | 2.10 | 1.90 Min | 2.22 | 2.20 Min | 2.22 | 2.20 Min |
| Cold Crushing Strength (Kg/cm2): | ||||||||||
| Drying at 110°C/24 hrs. | 300 | 250 Min | 380 | 350 Min | 280 | 250 Min | 310 | 300 Min | 210 | 200 Min |
| Fired at 800°C/3hrs. | 240 | — | — | — | 250 | — | — | — | — | — |
| Fired at 1100°C/3hrs. | 180 | — | 250 | — | — | — | 220 | — | 150 | — |
| Fired at 1350°C/3hrs. | 300 | 225 Min | — | — | — | — | 350 | 300 Min | — | — |
| Fired at 1450°C/3hrs. | — | — | 500 | 450 Min | — | — | — | — | 300 | 250 Min |
| Thermal Properties: – | ||||||||||
| Refractoriness, Orton / 0 C | 23/1605 | 20/1564 Min | 32 / 1717 | 31 / 1683 Min. | —- | —- | — | — | 32 / 1717 | 31 / 1683 Min. |
| PLC (%) | ||||||||||
| Fired at 800°C/3hrs. | -0.06 | — | -0.06 | — | -0.40 | ± 1.0 Max | — | — | -0.20 | ± 0.50 Max |
| Fired at 1100°C/3hrs. | -0.12 | — | -0.12 | — | — | — | — | — | -0.42 | ± 0.50 Max |
| Fired at 1350°C/3hrs. | -0.50 | ± 1.0 Max | — | — | — | — | -1.10 | ± 1.5 Max | — | — |
| Fired at 1450°C/3hrs. | — | — | -0.70 | ± 1.0 Max | — | — | — | — | -1.25 | ± 1.50 Max |
| Water requirements indicated are based on laboratory test conditions. Actual water requirement may vary subject to site conditions. The properties shown are for vibratory cast material only unless specified otherwise. All values are based on test results on standard bars of size 160x40x40 mm. Test methods are guided by and based on various Indian Standards (IS). | ||||||||||
