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Rulon Bearings

Ferro Aluminum Oxide P890
Categories: Ceramic; Oxide; Aluminum Oxide

Material Notes: Manufactured at the Diamonite Plant in Shreve, Ohio. Data provided by the manufacturer, Ferro Corporation.

Key Words: Al2O3, alumina, aluminium oxide, aluminum oxide
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Physical PropertiesMetricEnglishComments
Density 3.57 g/cc0.129 lb/in³
Water Absorption 0.00 %0.00 %
Open Porosity 0.00 %0.00 %Gas tight. Test with helium mass spectrometer
Weibull Modulus 1111
 
Mechanical PropertiesMetricEnglishComments
Knoop Microhardness 880880KHN5 microhardness, kg/mm²
Vickers Microhardness 10501050HV5 microhardness, kg/mm²
Tensile Strength, Ultimate 127 MPa18400 psiACMA Test #4
Modulus of Elasticity 293 GPa42500 ksiultrasonic
Compressive Strength 1900 MPa276000 psiASTM C773-74
Poissons Ratio 0.210.21ASTM C623
Shear Modulus 121 GPa17500 ksiultrasonic
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity  1.00e+10 ohm-cm
@Temperature 500 °C
1.00e+10 ohm-cm
@Temperature 932 °F
 1.00e+13 ohm-cm
@Temperature 300 °C
1.00e+13 ohm-cm
@Temperature 572 °F
Dielectric Constant 8.8
@Frequency 1e+6 Hz
8.8
@Frequency 1e+6 Hz
ASTM D-116
Dielectric Strength 8.31 kV/mm
@Thickness 6.35 mm
211 kV/in
@Thickness 0.250 in
ASTM D149
Dissipation Factor 0.0080
@Frequency 1e+6 Hz
0.0080
@Frequency 1e+6 Hz
ASTM D-116
 
Thermal PropertiesMetricEnglishComments
CTE, linear  5.10 µm/m-°C
@Temperature 25.0 - 200 °C
2.83 µin/in-°F
@Temperature 77.0 - 392 °F
ASTM C32
 6.70 µm/m-°C
@Temperature 25.0 - 500 °C
3.72 µin/in-°F
@Temperature 77.0 - 932 °F
ASTM C32
 7.50 µm/m-°C
@Temperature 25.0 - 800 °C
4.17 µin/in-°F
@Temperature 77.0 - 1470 °F
 7.80 µm/m-°C
@Temperature 25.0 - 1000 °C
4.33 µin/in-°F
@Temperature 77.0 - 1830 °F
ASTM C32
Thermal Conductivity 17.0 W/m-K118 BTU-in/hr-ft²-°F
 
Component Elements PropertiesMetricEnglishComments
Al2O3 92 %92 %
 
Descriptive Properties
ColorWhite

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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