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
100
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
3.6
Dielectric Strength (Breakdown Potential)
13 kV/mm 0.52 V/mil
Otherwise Unclassified Properties
Density
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