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 |