Crystex Composites Mykroy/Mycalex MM 800 Machining Grade Glass-bonded Mica Composite

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Crystex Composites Mykroy/Mycalex MM 800 Machining Grade Glass-bonded Mica Composite
Categories:	Ceramic; Glass; Glass Ceramic; Machinable Ceramic
Material Notes:	MM 800 (formerly MM 1600) is a compression molded glass mica composite that is the perfect alternative to high performance plastics where high temperature, good dielectric strength and good arc resistance are required. This material is softer than other high temperature machinable ceramics allowing for the fabrication of intricate or complex shapes. It can be drilled or tapped and can accommodate helical inserts. In addition, no post firing is required after fabrication. Product Benefits: Higher operating temperature Exceptional dimensional stability High compressive strength Higher thermal shock resistance Completely inorganic Does not burn or outgas Impervious to moisture, oils, and gases Withstands thermal cycling Low thermal conductivity High dielectric strength Low electrical loss High arc resistance Vacuum tight Can be glued with epoxy, sealing glass, or ceramic adhesives Synthetic Mica Filler Glass bonded mica specification ASTM D1049. Typical data below provided by Mykroy/Mycalex Ceramics.
Key Words:	Glass Bonded Mica
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Physical Properties	Metric	English	Comments

Density	2.74 g/cc	0.0990 lb/in³
Water Absorption	0.00 %	0.00 %

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell A	47	47
Hardness, Rockwell H	90	90
Tensile Strength at Break	41.4 MPa	6000 psi
Modulus of Elasticity	79.3 GPa	11500 ksi
Flexural Strength	93.1 MPa	13500 psi
Compressive Strength	276 MPa	40000 psi
Izod Impact, Notched	0.961 J/cm	1.80 ft-lb/in

Electrical Properties	Metric	English	Comments
Volume Resistivity	2.60e+15 ohm-cm	2.60e+15 ohm-cm
Surface Resistivity per Square	5.00e+13 ohm @Temperature 25.0 °C	5.00e+13 ohm @Temperature 77.0 °F
Dielectric Constant	6.91 @Frequency 1e+6 Hz	6.91 @Frequency 1e+6 Hz
Dielectric Strength	18.9 kV/mm	480 kV/in
Dissipation Factor	0.0030 @Frequency 1e+6 Hz	0.0030 @Frequency 1e+6 Hz
Dielectric Loss Index	0.0207 @Frequency 1e+6 Hz	0.0207 @Frequency 1e+6 Hz
Arc Resistance	300 sec	300 sec

Thermal Properties	Metric	English	Comments
CTE, linear	9.00 µm/m-°C @Temperature 25.0 °C	5.00 µin/in-°F @Temperature 77.0 °F
	10.46 µm/m-°C @Temperature 350 °C	5.811 µin/in-°F @Temperature 662 °F
	10.69 µm/m-°C @Temperature 500 °C	5.939 µin/in-°F @Temperature 932 °F
	15.81 µm/m-°C @Temperature 750 °C	8.783 µin/in-°F @Temperature 1380 °F
Specific Heat Capacity	0.874 J/g-°C	0.209 BTU/lb-°F
Thermal Conductivity	1.02 W/m-K	7.08 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	800 °C	1470 °F	Continuous

Descriptive Properties
Color	Off White

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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CMYKROY13 / 1655

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