G5  and G9 are composites of woven glass fabric combined with a melamine resin laminate. These composite materials are very hard, flame resistant machining grade with excellent electrical properties in high humidity conditions. These materials also have high physical strength and excellent arc resistance.

G5 conforms to MIL-I-24768/8, MIL-P15037 GMG and LP-509

G9 conforms to MIL-I-24768/1, MIL-P15037 GME and LP-509

Mechanical ASTM Test Method Value Units
Strength to Weight Ratio - - ksi
Specific Gravity @73 F D792 1.9 -
Tensile Strength @73 F, (ult)/(yld) D638 37,000 psi
Tensile Modulus of Elasticity @73 F D638 - psi
Tensile Elongation at Break @73 F D638 - %
Flexural Strength @73 F D790 55,000 psi
Flexural Modulus of Elasticity @73 F D790 2,500,000 psi
Shear Strength @73 F D732 20,000 psi
Comprehensive Strength, (% Deformation) @73 F D695 70,000 (10) psi
Comprehensive Modulus of Elasticity @73 F D695 - psi
Hardness, Rockwell, Scale as noted @73 F D785 M120 -
Hardness, Durometer, Shore D @73 F D2240 - -
Izod Impact, (Notched) @73 F D256 Type A 12.0 ft-lb/in of notch
Coefficient of Friction, (Dry vs Steel) Dynamic - - -
Limiting PV, (with 4 to 1 factor of safety applied) - - psi-ft/min
Thermal ASTM Test Method Value Units
Coefficient of Linear Thermal Expansion @73 F E-831 (TMA) - in/in/F
Heat Deflection Temperature @264 psi D648 - F
Tg-Glass transition termperature, (Amorphous) D3418 - F
Melting Point, (VS=Vicat Softening Temp.) D3418 - F
Continuous Service Temperature in Air, (Max.) - 285 F
Thermal Conductivity - - BTU-in/hr-ft2-F
Electric ASTM Test Method Value Units
Dielectric Strength, Short Term D149 350 Volts/mil
Volume Resistivity D257 - ohm-cm
Dielectric Constant @10E6 Hz D150 7.1 -
Dissipation Factor @10E6 Hz D150 0.017 -
Flammability @3.1 mm unless noted UL94 V-0 -
H2O ASTM Test Method Value Units
Water Absorption, Immersion, 24 hours D570(7) 0.40 % by weight
Water Absorption, Saturation D570(7) - % by weight