Glass-Epoxy (G-10, FR4, G-11) Characteristics
Epoxy resins are widely used in electronic applications because they are virtually impervious to moisture. As a thermoset material, glass epoxy has outstanding mechanical and electric strength as well as good dielectric properties.
FR4 is a fire-retardant grade of G-10 while the G-11 grade offers improved mechanical strength at higher temperatures. Epoxy resins are a good choice of thermosets for fabricated components for many electrical and mechanical applications.
- Good dimensional stability
- Outstanding insulating and electrical properties
- Moisture-resistant
- Excellent flammability rating
- UL listed
See the chart below for FR4 material properties, G-10 material properties and G-11 material properties, including specific heat of FR4.
Applications for G-10, FR4 and G-11 Thermosets
- Power generation components
- High-temperature applications
- Structural parts
- Printed circuit boards
Contact a Dielectric Manufacturing knowledge expert to discuss the use of epoxy resins for fabrication of your parts. Call 800-367-9122 or email sales@dielectricmfg.com.
Glass Epoxy Material Properties
| Property | Metric | units | English | units | ||
|---|---|---|---|---|---|---|
| General | ||||||
| Density | 1.9e3 - 2.1e3 | kg/m^3 | 0.0686 - 0.0759 | lb/in^3 USD/lb | ||
| Mechanical | ||||||
| Yield Strength | 6.5e7 - 7e7 | Pa | 9.43 - 10.2 | ksi | ||
| Tensile Strength | 7e7 - 7.5e7 | Pa | 10.2 - 10.9 | ksi | ||
| Elongation | 0.008 - 0.01 | % strain | 0.8 - 1 | % strain | ||
| Hardness (Vickers) | 1.77e8 - 2.06e8 | Pa | 18 - 21 | HV | ||
| Impact Strength (notched) | 2.11e3 - 3.82e3 | J/m^2 | 1 - 1.82 | ft.lbf/in^2 | ||
| Fracture Toughness | 8e5 - 1.1e6 | Pa/m^0.5 | 0.728 - 1 | ksi/in^0.5 | ||
| Young's Modulus | 1.2e10 - 1.4e10 | Pa | 1.74 - 2.03 | 10^6 psi | ||
| Thermal | ||||||
| Max Service Temperature | 122 - 138 | °C | 252 - 280 | °F | ||
| Insulator or Conductor | Insulator | Insulator | ||||
| Specific Heat Capability | 1.2e3 - 1.4e3 | J/kg °C | 0.287 - 0.334 | BTU/lb. °F | ||
| Thermal Expansion Coefficient | 2.2e-5 - 2.4e-5 | strain/°C | 12.2 - 13.3 | µstrain/°F | ||
| Eco | ||||||
| CO2 Footprint | 4.17 - 4.61 | kg/kg | 4.17 - 4.61 | lb/lb | ||
| Recyclable | No | No |
