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Rulon Bearings

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CeramTec Rocar® S Silicon Carbide, SSiC
Categories: Ceramic; Carbide

Material Notes: Rocar® is an extremely lightweight silicon carbide ceramic. It permits a reduction in mass forces at high speeds, and is considered for its hardness, excellent resistance to corrosion and sudden changes in temperature, excellent anti-friction properties, and higher heat conductivity over steel. The various types of Rocar include sintered and silicon infiltrated silicon carbide. SSiC is resistant to all chemical media. Since no metallic silicon is present in the matrix, it can be used at temperatures up to 1600°C without impaired strength.

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Physical PropertiesOriginal ValueComments
Density 3.15 g/ccDIN EN 623-2 / ASTM-C373 / ASTM-C20
Water Absorption 0.00 %DIN EN 623-2 / ASTM-C373
Porosity 2.0 %Closed (approximate)
Permeability 0.00Gas
Weibull Modulus >= 10DINV ENV 843-5
 
Mechanical PropertiesOriginal ValueComments
Vickers Microhardness 2300HV 0.5; DINV ENV 843-4
Tensile Strength at Break 410 MPaACMA Test #4 / DIN EN 843-1
Tensile Modulus 430 GPaYoung's; DINV ENV 843-2 / ASTM-F417
Flexural Strength 410 MPaDIN EN 843-1
Compressive Strength 3500 MPaASTM C-773-88 / DIN 51067T1
Poissons Ratio 0.17DINV ENV 843-2
Fracture Toughness 4.40 MPa-m½DIN 51109
Shear Modulus 184 GPaCalculated
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity <= 10 ohm-cm
@Temperature 400 °C
IEC 672-1
 1000 ohm-cm
@Temperature 20.0 °C
IEC 672-1
Dielectric Loss Index 0.20
@Frequency 9.00e+9 Hz
IEC 672-1
 
Thermal PropertiesOriginal ValueComments
CTE, linear 3.00 µm/m-°C
@Temperature 20.0 - 200 °C
DIN EN 821-1
 3.60 µm/m-°C
@Temperature 20.0 - 400 °C
DIN EN 821-1
 4.10 µm/m-°C
@Temperature 20.0 - 600 °C
DIN EN 821-1
 4.60 µm/m-°C
@Temperature 20.0 - 1000 °C
DIN EN 821-1
Specific Heat Capacity 0.600 J/g-°C
@Temperature 100 - 200 °C
DINV ENV 821-3
Thermal Conductivity 115 W/m-KDIN EN 821-2 / ASTM-C408
Maximum Service Temperature, Air 1500 °C
Maximum Service Temperature, Inert 1800 °C
 
Descriptive Properties
ColorBlack
Ra = Arithmetic Mean Roughness Value (µm)Profilometer (0.8 mm Cutoff)

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 go back to viewing the property data in MatWeb's normal format.

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