CRETE FAMILY

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).