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Rulon Bearings

712-3 Nextrema® Tinted Glass Ceramic/SCHOTT
Categories: Ceramic; Glass; Glass Ceramic
Material Notes: The NEXTREMA® family of glass-ceramics combines the glossy appearance of glass with exceptional thermal, chemical, optical and mechanical properties such as:
  • Very low coefficient of linear thermal expansion
  • Excellent temperature and thermal shock resistance
  • High transmission in infrared range and unique visible light transmission profiles with different specific grades
  • Excellent chemical resistance
High mechanical strength technical data presented herein are typical averages.
Vendors: NEXTREMA® glass-ceramics from SCHOTT combines the benefits of technical glasses with properties of high temperature materials.
General Brochure
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Physical PropertiesMetricEnglishComments
Density 2.55 g/cc0.0921 lb/in³
 
Chemical PropertiesMetricEnglishComments
Acid Class, SR 2.02.0DIN 12116
Alkali Class, AR 1.01.0ISO 695
 
Mechanical PropertiesMetricEnglishComments
Knoop Microhardness 600600HK 0.1 / 20; ISO 9385
Modulus of Elasticity 92.0 GPa13300 ksiASTM C-1259
Flexural Strength 168 MPa24400 psiBending sbB; DIN EN 1288, Part 5, R45
Poissons Ratio 0.250.25ASTM C-1259
Shear Modulus 36.8 GPa5340 ksiCalculated by MatWeb
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity  300000 ohm-cm
@Temperature 350 °C		300000 ohm-cm
@Temperature 662 °F		DIN 52326
 1.00e+7 ohm-cm
@Temperature 250 °C		1.00e+7 ohm-cm
@Temperature 482 °F		DIN 52326
Dielectric Constant 7.8
@Frequency 1e+6 Hz,
Temperature 25.0 °C		7.8
@Frequency 1e+6 Hz,
Temperature 77.0 °F		DIN 53483
Dielectric Loss Index 0.020
@Frequency 1e+6 Hz,
Temperature 25.0 °C		0.020
@Frequency 1e+6 Hz,
Temperature 77.0 °F		DIN 53483
 
Thermal PropertiesMetricEnglishComments
CTE, linear  -0.160 µm/m-°C
@Temperature 20.0 - 300 °C		-0.0889 µin/in-°F
@Temperature 68.0 - 572 °F
 0.380 µm/m-°C
@Temperature 300 - 700 °C		0.211 µin/in-°F
@Temperature 572 - 1290 °F
Specific Heat Capacity 0.830 J/g-°C
@Temperature 20.0 - 100 °C		0.198 BTU/lb-°F
@Temperature 68.0 - 212 °F
Thermal Conductivity 1.70 W/m-K
@Temperature 90.0 °C		11.8 BTU-in/hr-ft²-°F
@Temperature 194 °F		DIN 51936, ASTM E 1461-01
Maximum Service Temperature, Air  560 °C
@Time 1.80e+7 sec		1040 °F
@Time 5000 hour		Inhomogeneous Heating
 710 °C
@Time 1.80e+7 sec		1310 °F
@Time 5000 hour		Homogeneous Heating
 750 °C
@Time 3600 sec		1380 °F
@Time 1.00 hour		Inhomogeneous Heating
 885 °C
@Time 3600 sec		1630 °F
@Time 1.00 hour		Homogeneous Heating
 
Optical PropertiesMetricEnglishComments
Transmission, Visible  0.00 %
@Thickness 4.00 mm,
Wavelength 500 nm		0.00 %
@Thickness 0.157 in,
Wavelength 500 nm
 3.0 %
@Thickness 4.00 mm,
Wavelength 600 nm		3.0 %
@Thickness 0.157 in,
Wavelength 600 nm
 18 %
@Thickness 4.00 mm,
Wavelength 700 nm		18 %
@Thickness 0.157 in,
Wavelength 700 nm
IR Transmittance  71 %
@Thickness 4.00 mm,
Wavelength 1000 nm		71 %
@Thickness 0.157 in,
Wavelength 1000 nm
 75 %
@Thickness 4.00 mm,
Wavelength 1600 nm		75 %
@Thickness 0.157 in,
Wavelength 1600 nm
 80 %
@Thickness 4.00 mm,
Wavelength 2500 nm		80 %
@Thickness 0.157 in,
Wavelength 2500 nm
UV Transmittance 0.00 %
@Thickness 4.00 mm		0.00 %
@Thickness 0.157 in
 
Descriptive Properties
AppearanceTransparent
ColorDark Brown
Hydrolytic Resistance HGB1DIN ISO 719
tk100(°C)196specific electric volume resistivity of 108 O·cm
Thermal Shock Resistance (TSR)800°CResists cold water without cracking

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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