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

MechanicalASTM Test MethodValueUnits
Strength to Weight Ratio--ksi
Specific Gravity @73 FD7921.9-
Tensile Strength @73 F, (ult)/(yld)D63837,000psi
Tensile Modulus of Elasticity @73 FD638-psi
Tensile Elongation at Break @73 FD638-%
Flexural Strength @73 FD79055,000psi
Flexural Modulus of Elasticity @73 FD7902,500,000psi
Shear Strength @73 FD73220,000psi
Comprehensive Strength, (% Deformation) @73 FD69570,000 (10)psi
Comprehensive Modulus of Elasticity @73 FD695-psi
Hardness, Rockwell, Scale as noted @73 FD785M120-
Hardness, Durometer, Shore D @73 FD2240--
Izod Impact, (Notched) @73 FD256 Type A12.0ft-lb/in of notch
Coefficient of Friction, (Dry vs Steel) Dynamic---
Limiting PV, (with 4 to 1 factor of safety applied)--psi-ft/min
ThermalASTM Test MethodValueUnits
Coefficient of Linear Thermal Expansion @73 FE-831 (TMA)-in/in/F
Heat Deflection Temperature @264 psiD648-F
Tg-Glass transition termperature, (Amorphous)D3418-F
Melting Point, (VS=Vicat Softening Temp.)D3418-F
Continuous Service Temperature in Air, (Max.)-285F
Thermal Conductivity--BTU-in/hr-ft2-F
ElectricASTM Test MethodValueUnits
Dielectric Strength, Short TermD149350Volts/mil
Volume ResistivityD257-ohm-cm
Dielectric Constant @10E6 HzD1507.1-
Dissipation Factor @10E6 HzD1500.017-
Flammability @3.1 mm unless notedUL94V-0-
H2OASTM Test MethodValueUnits
Water Absorption, Immersion, 24 hoursD570(7)0.40% by weight
Water Absorption, SaturationD570(7)-% by weight