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Rulon Bearings

Alliance C-9B Strontium Ferrite Ceramic Magnetic Material
Categories: Ceramic; Oxide

Key Words: Magnet Magnets
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Physical PropertiesMetricEnglishComments
Density 4.80 - 5.00 g/cc0.173 - 0.181 lb/in³
 >= 4.90 g/cc>= 0.177 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Vickers 450 - 580450 - 580
Tensile Strength 34.5 MPa5000 psi
Tensile Strength, Ultimate 20.0 - 50.0 MPa2900 - 7250 psi
Modulus of Elasticity 150 GPa21800 ksi
 179 GPa26000 ksi
Flexural Strength 55.0 MPa7980 psi
Compressive Strength 700 MPa102000 psi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity >= 1.00 ohm-cm>= 1.00 ohm-cm
 1e+05
@Temperature 20.0 °C
1e+05
@Temperature 68.0 °F
Magnetic Coercive Force, Hc 3100 - 3400 Oe3100 - 3400 Oe
 3150 - 3450 Oe3150 - 3450 OeIntrinsic
 3500 Oe3500 Oe
 4000 Oe4000 OeIntrinsic
Magnetic Remanence, Br 4000 Gauss4000 Gauss
 4300 - 4500 Gauss4300 - 4500 Gauss
Magnetic Maximum Energy Product, BH 3.8 MGOe3.8 MGOe
 4.4 - 4.8 MGOe4.4 - 4.8 MGOe
Curie Temperature 450 °C842 °F
 450 °C842 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear 10.0 µm/m-°C5.56 µin/in-°FPerpendicular to M
 14.0 µm/m-°C7.78 µin/in-°FParallel to M
 9.00 - 9.50 µm/m-°C
@Temperature 20.0 °C
5.00 - 5.28 µin/in-°F
@Temperature 68.0 °F
Parallel DOM
CTE, linear, Transverse to Flow 8.00 µm/m-°C
@Temperature 23.0 °C
4.44 µin/in-°F
@Temperature 73.4 °F
Perpendicular to M
Maximum Service Temperature, Air 350 °C662 °F
 <= 350 °C<= 662 °FContinuous
 
Descriptive Properties
CompositionSrO-6Fe2O3
Required Magnetizing Force (Oe)20000
Reversible Temperature Coefficients-0.2α Br. %/°C
 0.35β Hcj. %/°C

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