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NEMA Grade G-7 (GSG) Glass-Silicone Laminate

NEMA grade G-7 is a grade of NEMA laminate. The graph bars on the material properties cards below compare NEMA grade G-7 to other thermoset plastics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Compressive (Crushing) Strength

200 MPa 30 x 103 psi

Flexural Modulus

9.0 GPa 1.3 x 106 psi

Flexural Strength

130 MPa 19 x 103 psi

Impact Strength: Notched Izod

320 J/m 6.0 ft-lb/in

Rockwell M Hardness


Shear Strength

120 MPa 17 x 103 psi

Tensile Strength: Ultimate (UTS)

140 MPa 21 x 103 psi

Thermal Properties

Maximum Temperature: Mechanical

200 °C 380 °F

Thermal Expansion

10 µm/m-K

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz


Dielectric Strength (Breakdown Potential)

13 kV/mm 0.52 V/mil

Otherwise Unclassified Properties


1.7 g/cm3 100 lb/ft3

Water Absorption After 24 Hours

0.37 %

Common Calculations

Strength to Weight: Axial

23 points

Strength to Weight: Bending

36 points

Followup Questions

Further Reading

NEMA LI 1: Industrial Laminated Thermosetting Products

Thermosets: Structure, Properties and Applications, Qipeng Guo (editor), 2012