Materials

G-7 Glass-Silicone Laminate

Product Description

G-7 glass-silicone laminate has good electrical properties under humid conditions, excellent heat and arc resistance, and is self-extinguishing.

Typical Applications

G-7 is used for electrical grade insulation, and for heating & appliance insulation. Meets Mil-I-247681/17 GSG

Typical Property Values      
Property Test Method Unit Value
       
Physical      
Density D792

(lb/in3)
(g/cm3)

0.065
1.80

Water Absorption ASTM D570 24 hrs (%) 0.10
Rockwell Hardness M ASTM D785 M 105
       
Mechanical      
Tensile Strength at Break ASTM D638 psi 20,000
Flexural Strength -lengthwise D790 psi 30,000
Flexural Modulus -lengthwise D790 Kpsi 1,600
IZOD Notched Impact -lengthwise D256 (ft-lb/in) 13.0
Compressive Strength D695 (psi) 50,000
       
Thermal      
Coefficient of Thermal Expansion -lengthwise ASTM D696 in/in/°F 7.20 μin/in-°F
Coefficient of Thermal Expansion -crosswise ASTM D696 in/in/°F 9.00 μin/in-°F
Max Operating Temp (°F / °C)     428 / 220
Thermal Conductivity C177 (BTU-in/ft2-hr-°F) 2.0
Thermal Conductivity C177 (W/m-K ) .288
Flammability Rating UL94   HB
       
Electrical      
Dielectric Strength D149 kV/in 350
Dielectric Constant D150 @Frequency 1e+6 Hz 4.5
Dissipation Factor D150 @Frequency 1e+6 Hz 0.0180
Arc Resistance (sec) D495 (sec) 240
       

Typical values intended for reference and comparison purposes only. This data should not be used as the sole basis for design specifications or quality control. Contact us for specific manufacturers’ property datasheets for more complete technical information. All values at 73°F (23°C) unless otherwise noted.

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