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Material Name

FR4

Material Type
Plastic

Process Compatibility

CNC machining
Property Value
Mechanical Properties
Ultimate tensile strength 240 – 310 MPa
Young’s modulus (modulus of elasticity) 12 – 27 GPa
Elongation at break 0.008 – 0.01 %
Hardness 100 – 110 HRM
Physical Properties
UV resistance Good
Thermal Properties
Maximum service temperature 122 – 145 °C
Thermal expansion coefficient 9.9 – 11.9 × 10-6/ºC
Thermal conductivity 0.29 – 0.34 W/(m⋅°C)
Electrical Properties
ESD Safety No
Common Applications
Structural applications Electrical applications
PC boards

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