MatWeb - Material Property Data Advertise with MatWeb!     Register Now
Data sheets for over 180,000 metals, plastics, ceramics, and composites.
MatWeb - Material Property Data HOME  •   SEARCH  •   TOOLS  •   SUPPLIERS  •   FOLDERS  •   ABOUT US  •   FAQ  •   LOG IN    
Recently Viewed Materials (most recent at top)  

Login to see your most recently viewed materials here.

Or if you don't have an account with us yet, then click here to register.

  Searches:   Advanced  | Category  | Property  | Metals  | Trade Name  | Manufacturer  | Recently Viewed Materials
  

Rulon Bearings

95% Alumina, vitreous body
Categories: Ceramic; Oxide; Aluminum Oxide

Material Notes: Good Thermal Shock resistance, Tc value = 800-1100°C (1470-2010°F).

Key Words: aluminum oxide
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 3.61 - 3.75 g/cc0.130 - 0.135 lb/in³
Water Absorption 0.00 %0.00 %24 hrs
Open Porosity <= 1.0 %<= 1.0 %Hermetic (helium mass spectrometer test on 0.254 mm (0.010 in) sections)
 
Mechanical PropertiesMetricEnglishComments
Knoop Microhardness 17201720
Hardness, Mohs 9.09.0
Tensile Strength, Ultimate 170 - 240 MPa24700 - 34800 psi
Modulus of Elasticity 270 - 295 GPa39200 - 42800 ksi
Flexural Strength 310 - 345 MPa45000 - 50000 psi
Charpy Impact, Notched 0.700 - 0.860 J/cm²3.33 - 4.09 ft-lb/in²
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity  6.00e+8 ohm-cm
@Temperature 700 °C
6.00e+8 ohm-cm
@Temperature 1290 °F
 9.00e+14 ohm-cm
@Temperature 100 °C
9.00e+14 ohm-cm
@Temperature 212 °F
 1.00e+16 ohm-cm
@Temperature 25.0 °C
1.00e+16 ohm-cm
@Temperature 77.0 °F
Dielectric Strength 9.84 - 15.7 kV/mm250 - 399 kV/in(AC)
 0.0311 - 0.0465 kV/mm
@Temperature 1000 °C
0.790 - 1.18 kV/in
@Temperature 1830 °F
AC
 0.155 - 0.186 kV/mm
@Temperature 500 °C
3.94 - 4.72 kV/in
@Temperature 932 °F
AC
 
Thermal PropertiesMetricEnglishComments
CTE, linear  5.70 - 6.67 µm/m-°C
@Temperature 25.0 - 200 °C
3.17 - 3.71 µin/in-°F
@Temperature 77.0 - 392 °F
 6.70 - 7.65 µm/m-°C
@Temperature 25.0 - 600 °C
3.72 - 4.25 µin/in-°F
@Temperature 77.0 - 1110 °F
 7.60 µm/m-°C
@Temperature 25.0 - 800 °C
4.22 µin/in-°F
@Temperature 77.0 - 1470 °F
 8.07 µm/m-°C
@Temperature 25.0 - 700 °C
4.48 µin/in-°F
@Temperature 77.0 - 1290 °F
 8.45 - 9.14 µm/m-°C
@Temperature 25.0 - 1000 °C
4.69 - 5.08 µin/in-°F
@Temperature 77.0 - 1830 °F
Specific Heat Capacity 0.437 - 0.442 J/g-°C0.104 - 0.106 BTU/lb-°F
Thermal Conductivity  19.0 - 22.0 W/m-K
@Temperature 38.0 °C
132 - 153 BTU-in/hr-ft²-°F
@Temperature 100 °F
 35.0 W/m-K
@Temperature 425 °C
243 BTU-in/hr-ft²-°F
@Temperature 797 °F
 43.0 W/m-K
@Temperature 870 °C
298 BTU-in/hr-ft²-°F
@Temperature 1600 °F
Maximum Service Temperature, Air 1600 - 1700 °C2910 - 3090 °Fmaximum working temperature
 
Component Elements PropertiesMetricEnglishComments
Al2O3 95 %95 %

References for this datasheet.

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.

Users viewing this material also viewed the following:
85% Alumina, vitreous body
92% Alumina, opaque
96% Alumina, thick-film, as fired
99.5% Alumina, vitreous body
Corundum, Aluminum Oxide, Alumina, 99.9%, Al2O3

BA2D / 138

Free Trade Publications, Click Here!
Free Trade Publications, Click Here!

Please read our License Agreement regarding materials data and our Privacy Policy. Questions or comments about MatWeb? Please contact us at info@matweb.com. We appreciate your input.

The contents of this web site, the MatWeb logo, and "MatWeb" are Copyright 1996-2025 by MatWeb, LLC. MatWeb is intended for personal, non-commercial use. The contents, results, and technical data from this site may not be reproduced either electronically, photographically or substantively without permission from MatWeb, LLC.