555 Molding Grade

Note: This is a variation of Micatemp / Mycalex (750ºF – 1300ºF Machinable Ceramic Materials).

Micatemp Machinable Glass/Mica Ceramic Composite are designed for electro-mechanical and thermo-mechanical applications requiring one or more of the following properties: good machinability, excellent resistance to heat and/or open flame up to 1832ºF (1000ºC), low thermal conductivity, excellent electrical insulation, extremely high resistance to pressure, high resistance to impact (cracking, and chipping), impervious to most chemicals (including oil, grease, and water), asbestos-free, and ecologically safe and non-toxic.

Specifications

FlammabilityDoes not burn
Moisture AbsorptionNil
Hardness - Rockwell H ( H )90
Hardness - Brinell ( H )56
Density ( lb/in³ )0.13
Flexural Strength ( psi )9000
Specific Gravity3.7
Coefficient of Thermal Expansion ( in/in/ºF )6.0 x 10-6
Coefficient of Thermal Expansion ( in/in/ºC )11.0 x 10-6
Tensile Strength ( psi )6000
Compressive Strength ( psi )34000
Arc Resistance ( sec )325
Thermal Conductivity ( BTU-in/hr-ft²-ºF )0.00130
Thermal Conductivity ( cal cm/secell namem² ºF )0.31
Dielectric Constant ( MHz )8.8
Specific Heat ( cal/g/ºC )0.24
IZOD Impact Strength ( ft lb/in )0.7
Maximum Continuous Operating Temperature ( ºC )400
Maximum Continuous Operating Temperature ( ºF )750
Mica FillerSynthetic
Radiation Resistance (3 x 1010 Rods-Cobalt)Better
Dielectric Strength (1/8" Thick) ( V/mil )375
Permittivity ( MHz )8.8/8.2
Dissipation Factor ( MHz )0.0013
Loss Index ( MHz )0.0110
Dry Surface Resistivity at (70ºF) ( ohm-cm )1015
Volume Resistivity at 70ºF ( ohm-cm )1014
Wet Surface Resistivity at (70ºF) ( ohm-cm )109
Modulus of Elasticity (in Tension) ( psi )7.2 x 106
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