# NEMA Grade G-5 (GMG) Glass-Melamine Laminate

NEMA grade G-5 is a grade of NEMA laminate. The graph bars on the material properties cards below compare NEMA grade G-5 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

330 *MPa* 47 *x 10 ^{3} psi*

Flexural Modulus

16 *GPa* 2.3 *x 10 ^{6} psi*

Flexural Strength

310 *MPa* 45 *x 10 ^{3} psi*

Impact Strength: Notched Izod

330 *J/m* 6.3 *ft-lb/in*

Rockwell M Hardness

120

Shear Strength

140 *MPa* 20 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

230 *MPa* 34 *x 10 ^{3} psi*

## Thermal Properties

Maximum Temperature: Mechanical

140 *°C* 280 *°F*

Thermal Expansion

10 *µm/m-K*

## Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz

6.7

Dielectric Strength (Breakdown Potential)

14 *kV/mm* 0.54 *V/mil*

## Otherwise Unclassified Properties

Density

1.9 *g/cm ^{3}* 120

*lb/ft*

^{3}Water Absorption After 24 Hours

0.63 *%*

## Common Calculations

Strength to Weight: Axial

34 *points*

Strength to Weight: Bending

44 *points*

## Followup Questions

## Further Reading

NEMA LI 1: Industrial Laminated Thermosetting Products

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