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Elmet Technologies

Unifrax Excelfrax® 1800 Flexliner Microporous Insulation
Categories: Ceramic; Oxide; Silicon Oxide

Material Notes: Unifrax Corporation's Excelfrax® product line, based on advanced microporous insulation technology, is a family of products which all exhibit superior insulating characteristics. Excelfrax microporous insulation is composed of inorganic oxides, primarily fumed silica. Silicates and opacifiers are added to improve the material performance. Microporous materials are very efficient insulation products. These products actually have thermal conductivity values lower than still air.

Excelfrax 1800 Flexliner is a flexible, thin, microporous insulating panel with superior insulating characteristics. Excelfrax 1800 Flexliner is designed for use between the ladle shell and backup lining. This product can be used to provide maximum thermal efficiency in ladle liner design. By incorporating Excelfrax 1800 Flexliner into a lining design, it is possible to reduce ladle heat loss without decreasing ladle capacity, increase ladle capacity by reducing required thickness of insulating materials, and minimize the amount of solidified metal in the ladle after the casting process is complete. Typical applications for Excelfrax 1800 Flexliner include transfer ladles, torpedo ladles, and tundish insulation.

Information Provided by Unifrax I LLC

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Physical PropertiesMetricEnglishComments
Density 0.365 g/cc0.0132 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Compressive Strength 1.30 MPa189 psiCold Crushing Strength; DIN 51067 / DIN 53421
Compression Set 3.7 %
@Pressure 0.100 MPa
3.7 %
@Pressure 14.5 psi
 
Thermal PropertiesMetricEnglishComments
Specific Heat Capacity 0.800 J/g-°C
@Temperature 32.0 - 800 °C
0.191 BTU/lb-°F
@Temperature 89.6 - 1470 °F
Thermal Conductivity  0.0210 W/m-K
@Temperature 20.0 °C
0.146 BTU-in/hr-ft²-°F
@Temperature 68.0 °F
DIN 51046
 0.0230 W/m-K
@Temperature 200 °C
0.160 BTU-in/hr-ft²-°F
@Temperature 392 °F
DIN 51046
 0.0280 W/m-K
@Temperature 400 °C
0.194 BTU-in/hr-ft²-°F
@Temperature 752 °F
DIN 51046
 0.0340 W/m-K
@Temperature 600 °C
0.236 BTU-in/hr-ft²-°F
@Temperature 1110 °F
DIN 51046
 0.0420 W/m-K
@Temperature 800 °C
0.291 BTU-in/hr-ft²-°F
@Temperature 1470 °F
DIN 51046
Maximum Service Temperature, Air 1000 °C1830 °FRecommended Operating Temperature
Minimum Service Temperature, Air 20.0 °C68.0 °FRecommended Operating Temperature
Shrinkage  1.9 %
@Temperature 950 °C
1.9 %
@Temperature 1740 °F
All sides, long term
 4.8 %
@Temperature 1000 °C
4.8 %
@Temperature 1830 °F
All sides, long term
 0.60 %
@Temperature 1000 °C,
Time 43200 sec
0.60 %
@Temperature 1830 °F,
Time 12.0 hour
Single sided
 
Component Elements PropertiesMetricEnglishComments
SiO2 50 %50 %
 
Descriptive Properties
ColorSilver
Other Inorganics (%)5
ZrSiO4 (%)45

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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