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Elmet Technologies

CeramTec SL 200 ST Silicon Nitride, Si3N4-Y2O3
Categories: Ceramic; Nitride

Material Notes: SL 200 ST is a silicon nitride ceramic especially suitable for components exposed to mechanical stress and engine-specific applications even at elevated temperatures. It is recognized for its high strength and crack resistance, as well as its resistance to sudden changes in temperature. In contrast to the other silicon nitride materials, this is a gas-pressure sintered Si3N4 and hence possesses much better mechanical properties such as greater flexural strength, fracture toughness, and a higher Weibull modulus.

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Physical PropertiesMetricEnglishComments
Density 3.21 g/cc0.116 lb/in³DIN EN 623-2 / ASTM-C373 / ASTM-C20
Water Absorption 0.00 %0.00 %DIN EN 623-2 / ASTM-C373
Permeability 0.000.00Gas
Weibull Modulus 1515DINV ENV 843-5
 
Mechanical PropertiesMetricEnglishComments
Vickers Microhardness 15001500HV 0.5; DINV ENV 843-4
Tensile Strength at Break 750 MPa109000 psiACMA Test #4 / DIN EN 843-1
Tensile Modulus 305 GPa44200 ksiYoung's; DINV ENV 843-2 / ASTM-F417
Flexural Strength 900 MPa131000 psiDIN EN 843-1
Compressive Strength 3000 MPa435000 psiASTM C-773-88 / DIN 51067T1
Poissons Ratio 0.260.26DINV ENV 843-2
Fracture Toughness 7.00 MPa-m½6.37 ksi-in½DIN 51109
Shear Modulus 121 GPa17500 ksiCalculated
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+14 ohm-cm1.00e+14 ohm-cmASTM-D257
Dielectric Constant 8.0
@Frequency 1e+6 Hz
8.0
@Frequency 1e+6 Hz
IEC 672-1 / ASTM-C150
Dielectric Loss Index 0.00010
@Frequency 1e+9 Hz
0.00010
@Frequency 1e+9 Hz
IEC 672-1 / ASTM-D149,150
 
Thermal PropertiesMetricEnglishComments
CTE, linear  3.20 µm/m-°C
@Temperature 20.0 - 200 °C
1.78 µin/in-°F
@Temperature 68.0 - 392 °F
DIN EN 821-1
 4.30 µm/m-°C
@Temperature 20.0 - 1000 °C
2.39 µin/in-°F
@Temperature 68.0 - 1830 °F
DIN EN 821-1
Specific Heat Capacity 0.700 J/g-°C
@Temperature 100 - 200 °C
0.167 BTU/lb-°F
@Temperature 212 - 392 °F
DINV ENV 821-3
Thermal Conductivity 21.0 W/m-K
@Temperature 20.0 - 100 °C
146 BTU-in/hr-ft²-°F
@Temperature 68.0 - 212 °F
DIN EN 821-2 / ASTM-C408
Maximum Service Temperature, Air 1300 °C2370 °F
Maximum Service Temperature, Inert 1600 °C2910 °F

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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