CNC machining in FR4 | Manufacturing Materials

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FR4

5.0 (52 Reviews) 1220 orders

Material type: Plastic

FR-4 glass epoxy is a popular and versatile high-pressure thermoset plastic laminate grade with good strength to weight ratios. With near zero water absorption, FR-4 is most commonly used as an electrical insulator possessing considerable mechanical strength. The material is known to retain its high mechanical values and electrical insulating qualities in both dry and humid conditions.

Process compatibility

CNC Milling CNC Turning

Material Color

Green

Yellow

Black

Material advantages

It has excellent electrical performance, high working temperature, and its performance is less affected by the environment.

Material shortcomings

Recommended description

These attributes, along with good fabrication characteristics, lend utility to this grade for a wide variety of electrical and mechanical applications.

Properties

Name
Tensile strength	415 MPa
Rockwell hardness	110 M scale
Temperature index	140 °C
Water absorption	−0.125 in < 0.10%
Specific gravity/density	1.850 g/cm3
Dielectric breakdown (A)	> 50 kV
Young's modulus – LW	24 GPa
Thermal conductivity	0.29 - 0.34 W/(m⋅°C)