TYPICAL PROPERTIES of MICA (values dependent on specific grade of material)
Physical Properties Test Method Typical Value
MICA Content IEC 371-2 90
Bond Content IEC-371-2 10
Density G/cm IEC-371-2 2.15-2.25
Density Lbs/in IEC-371-2 0.167-0.175
Heat Resistance
Continuous Service (º F) 932-1292
Intermittent service (º F) 1472-1832
Edge Strength (Lbs/mil) In house .505-.953
Tensile Strength N/mm ISO 527 100-150
Tensile Strength PSI ISO 527 14,500-21,750
Flexural Strength N/mm ISO 178 150-200
Flexural Strength PSI ISO 178 21,750-33,350
Water Absorption ISO 62 <1
Dielectric Strength (/mil) IEC 243 >500
Resistance 13º F (O x inch) IEC 93 >400
Resistance 1022º F (O x inch) IEC 93 >398
Heat Loss at 932º F (%) IEC 371-2 <1
Heat Loss at 1292º F (%) IEC 371-2 <2
Thermal expansion
Perpendicular to layer (10-6/K) 100
Parallel to layer (10-6/K) 10
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