Glass Epoxy (G10, FR4)

 In Thermoset Plastics

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Glass Epoxy (G10, FR4) 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.

Epoxy resins are a good choice of thermosets for fabricated components for many electrical and mechanical applications.

FR4 is the fire-retardant grade of G10.

These materials offer:here to help 200

  • Good dimensional stability
  • Outstanding insulating and electrical properties
  • Moisture-resistance
  • Excellent flammability rating
  • UL listed

See the charts below for G-10 and FR4 material properties.

Applications for G10, FR4 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.

G10 Glass Epoxy Material Properties

Properties   
Tensile Strength40,000 psi lengthwise35,000 psi crosswise
Comprehensive Strength68,000 psi flatwise35,000 psi edgewise
Flexural Strength - .125"55,000 psi lengthwise45,000 psi crosswise
Modulus of Elasticity - Flexural2,700 psi lengthwise2,200 psi crosswise
IZOD Impact7.0 ft-lb/in of notch lengthwise5.5 ft-lb/in of notch crosswise
Rockwell Hardness M scale111
Specific Gravity1.80
Bond Strength, in lbs.2,000
Coefficient of Thermal Expansion cm/cm- ºCx10-50.9
Water Absorption0.62" thick % per 24 hrs = 0.250.125" thick % per 24 hrs = 0.150.500" thick % per 24 hrs = 0.10
Dielectric Strength, volt/mil perpendicular to laminations: Step by Step 0.62" thick = 4500.125" thick = 350
Dissipation Factor, condition A, 1 megacycle max0.025
Dielectric Constant condition A, 1 megacycle max5.2
Insulation Resistance, Megaohms at Condition C200,000
Temp. Index 0.62" and overElectrical - ºC = 130Mechanical - ºC = 140
Mil-1-247682
MIL - TypeGEE

FR4 Glass Epoxy Material Properties

Properties   
Tensile Strength40,000 psi lengthwise35,000 psi crosswise
Comprehensive Strength60,000 psi flatwise35,000 psi edgewise
Flexural Strength - .125"55,000 psi lengthwise45,000 psi crosswise
Modulus of Elasticity - Flexural2,700 psi lengthwise2,200 psi crosswise
IZOD Impact7.0 ft-lb/in of notch lengthwise5.5 ft-lb/in of notch crosswise
Rockwell Hardness M scale110
Specific Gravity1.85
Bond Strength, in lbs.2,000
Coefficient of Thermal Expansion cm/cm- ºCx10-51.0
Water Absorption0.62" thick % per 24 hrs = 0.250.125" thick % per 24 hrs = 0.150.500" thick % per 24 hrs = 0.10
Dielectric Strength, volt/mil perpendicular to laminations: Step by Step 0.62" thick = 4500.125" thick = 350
Dissipation Factor, condition A, 1 megacycle max0.025
Dielectric Constant condition A, 1 megacycle max5.2
Insulation Resistance, Megaohms at Condition C200,000
Temp. Index 0.62" and overElectrical - ºC = 130Mechanical - ºC = 140
Mil-1-2476827
MIL - TypeGEE-F
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