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Rulon Bearings

Thermal Ceramics Kao-Tab SR High Alumina Castables
Categories: Ceramic; Oxide; Aluminum Oxide

Material Notes: Kao-Tab SR is an 88%-alumina castable designed for gunning or ramming. It maintains high strength throughout the temperature range of 3000°F (1649°C). Key features are high strength, good abrasion resistance, and excellent slag resistance (both basic and acidic types).

Features:

  • Designed for supercritical applications
  • Specially enhanced high alumina chemistries that allow Kao-Tab to outperform conventional castables
  • Applications:

  • Cat cracker transfer lines where more abrasion resistance is needed
  • Secondary ammonia reformer linings where low silica is desired
  • Recovery boiler
  • Upper furnace walls
  • Recovery/cyclone boilers
  • Lower furnace walls and floor
  • Cyclone boilers
  • Information provided by Thermal Ceramics

    Data has not been recently verified. Please contact manufacturer for current information.

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    Physical PropertiesMetricEnglishComments
    Density 2.564 - 2.724 g/cc0.09263 - 0.09841 lb/in³Fired
     
    Mechanical PropertiesMetricEnglishComments
    Modulus of Rupture 0.00689 - 0.00965 GPa1.00 - 1.40 ksiDried 18-24 hours at 220°F; ASTM C133
     0.00621 - 0.00896 GPa
    @Treatment Temp. 816 °C,
    Time 18000 sec
    0.900 - 1.30 ksi
    @Treatment Temp. 1500 °F,
    Time 5.00 hour
    ASTM C133
     0.0103 - 0.0152 GPa
    @Treatment Temp. 1650 °C,
    Time 18000 sec
    1.50 - 2.20 ksi
    @Treatment Temp. 3000 °F,
    Time 5.00 hour
    ASTM C133
    Compressive Strength 34.0 - 59.0 MPa4930 - 8560 psiFired 5 hours at 1500°F; ASTM C133
     34.0 - 62.0 MPa4930 - 8990 psiDried for 18-24 hours at 220°F
     41.0 - 62.0 MPa5950 - 8990 psiFired 5 hours at 3000°F
    Abrasion 18 - 2418 - 24loss, cc`s; Fired 5 hours at 1500°F; ASTM C704
     
    Thermal PropertiesMetricEnglishComments
    Thermal Conductivity  1.33 W/m-K
    @Temperature 1370 °C
    9.20 BTU-in/hr-ft²-°F
    @Temperature 2500 °F
    ASTM C417
     1.40 W/m-K
    @Temperature 1090 °C
    9.70 BTU-in/hr-ft²-°F
    @Temperature 2000 °F
    ASTM C417
     1.59 W/m-K
    @Temperature 816 °C
    11.0 BTU-in/hr-ft²-°F
    @Temperature 1500 °F
    ASTM C417
     1.67 W/m-K
    @Temperature 538 °C
    11.6 BTU-in/hr-ft²-°F
    @Temperature 1000 °F
    ASTM C417
     1.83 W/m-K
    @Temperature 260 °C
    12.7 BTU-in/hr-ft²-°F
    @Temperature 500 °F
    ASTM C417
    Maximum Service Temperature, Air 1650 °C3000 °F
    Shrinkage 0.00 - 0.00 %0.00 - 0.00 %
     0.10 - 0.30 %
    @Temperature 816 °C,
    Time 18000 sec
    0.10 - 0.30 %
    @Temperature 1500 °F,
    Time 5.00 hour
    ASTM C113
     0.00 - 0.20 %
    @Treatment Temp. 104 °C
    0.00 - 0.20 %
    @Treatment Temp. 220 °F
    Dried 18-24 hours; ASTM C113
     
    Processing PropertiesMetricEnglishComments
    Shelf Life 12.0 Month12.0 Month
     
    Component Elements PropertiesMetricEnglishComments
    Al2O3 88 %88 %
    Alkalis 0.20 %0.20 %
    CaO 4.2 %4.2 %
    Fe2O3 7.1 %7.1 %
    SiO2 0.20 %0.20 %

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    CTHERM067 / 2387

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