FR-4 Laminate

FR-4 Laminate


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.


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


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


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


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


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.