FR-4 Laminate
FR-4 Laminate Overview
What is the Material: FR-4 Laminate is a thermoset material, which consists of glass fabric filled with an epoxy resin.
Key Material Features: This material is beneficial in applications requiring fire resistance, low water absorption, dimension stability, mechanical strength, and electrical properties in wet and dry applications.
Other Considerations: FR-4 is a flame retardant grade of G-10, so FR-4 can be substituted for G-10 safety, but G-10 cannot be substituted for FR-4 without understanding the application.
Physical
| Property | Value | Typical ASTM Test |
|---|---|---|
| Chemical Designation | (FR-4) Glass Epoxy | |
| Filler | Epoxy | |
| Color | Natural/Light Green | |
| Density (g/cm^3) | 1.85 | D 792 |
Mechanical
| Property | Value | Typical ASTM Test |
|---|---|---|
| Tensile Strength at Yield (psi) | 38000 | D 638 |
| Flexural Strength (psi) | 60000 | D 790 |
| Compression Strength: 10% Strain (psi) | 66000 | D 695 |
| Impact Strength (Izod) (ft-lbs/in) | 14 | D 256 |
| Hardness (M) | 115 | D 785 |
Thermal
| Property | Value | Typical ASTM Test |
|---|---|---|
| Service Temperature Continuous (°F) | 284 | |
| Service Temperature Minimal (°F) | -200 | |
| Thermal Expansion (CLTE) (in/in/°F) | 1.00E-5 | D 696 |
Electrical
| Property | Value | Typical ASTM Test |
|---|---|---|
| Dielectric Strength (V/mil) | 800 | D 149 |
| Dissipation Factor (1MHz) | 0.032 | D 150 |
| Dielectric Constant (1MHz) | 4.8 | D 150 |
Other
| Property | Value | Typical ASTM Test |
|---|---|---|
| Moisture Absorption (%) (24 Hours) | 0.1 | D 570 |
| Flammability | V-0 |
The data stated are typical values intended for reference and comparison purposes only. The data should not be used as a basis for design specifications or quality control. The information is provided as a guide to the best of our knowledge and given without obligation or liability. Testing under individual application circumstances is recommended.