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Rulon Bearings

Overview - Alumina, 98%, Al2O3
Categories: Ceramic; Oxide; Aluminum Oxide
Material Notes: Information below is typical for commercially available 98% alumina. A wide variation of properties is possible between specific grades.
Key Words: Alpha alumina, Al2O3, aluminum oxide, corundum, aluminium oxide
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Physical PropertiesMetricEnglishComments
Density 3.90 g/cc0.141 lb/in³
Water Absorption 0.00 %0.00 %
Weibull Modulus >= 10>= 10
 
Mechanical PropertiesMetricEnglishComments
Hardness, Mohs 9.09.0
Tensile Strength, Ultimate 240 MPa34800 psi
Modulus of Elasticity 340 GPa49300 ksi
Flexural Strength 350 MPa50800 psi
Compressive Strength 2500 MPa363000 psi
Poissons Ratio 0.220.22
Shear Modulus 140 GPa20300 ksi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 1.00e+14 ohm-cm1.00e+14 ohm-cm
Dielectric Constant 9.69.6
Dielectric Strength 9.00 kV/mm229 kV/inWide Variation Between Grades
 
Thermal PropertiesMetricEnglishComments
CTE, linear 8.10 µm/m-°C
@Temperature 20.0 - 1000 °C		4.50 µin/in-°F
@Temperature 68.0 - 1830 °F
Specific Heat Capacity 0.880 J/g-°C0.210 BTU/lb-°F
Thermal Conductivity 25.0 W/m-K174 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 1650 °C3000 °FNo Load
 
Component Elements PropertiesMetricEnglishComments
Al2O3 98 %98 %
 
Descriptive Properties
ColorWhite to Ivory

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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BA2G / 141

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