G10/FR-4 Glass Epoxy

G10/FR-4 is Widely Used For:

  • Printed circuit boards
  • Insulators for electromechanical devices
  • Jigs and fixtures
  • High strength composite parts

Performance Characteristics:

  • Flame retardant
  • Strong and stiff
  • Dimensionally stable
  • Outstanding electrical properties
  • Creep resistance

Common Brands:

  • Micarta
  • G10/FR-4

G10/FR-4 Glass Epoxy

Glass/epoxy composite material with outstanding electrical properties

G10/FR-4 is a composite material that consists of glass fabric, electrical grade epoxy resin. The material is extremely strong and stiff, has a low coefficient of thermal expansion, and outstanding electrical properties. G10/FR-4 is widely used as an insulator for electrical and electronic applications. It is also used for mechanical applications when outstanding strength, stiffness, and excellent creep resistance are required.

Shop for G10/FR-4 Glass Epoxy


SHEET Dimensions:
36 in x 48 in – 48 in x 96 in
0.010 in – 2 in
ROD Outside Diameter:
0.062 in – 6 in
COLOR Natural

Length, width, thickness, and diameter tolerances vary by size, by manufacturer, brand, and grade. Custom sizes  available upon request.

G10/FR-4 Glass Epoxy Properties

Typical properties of G10/FR-4 GLASS EPOXY
Specific gravity   D792 1.80
Tensile strength (CW) psi D638 38,000
Flexural strength (CW) psi D790 60,000
Flexural modulus psi D790 2,400,000
Compressive strength psi D695 55,000
Hardness Rockwell M D785 115
Izod impact (notched, CW) ft-lbs/in of notch D256 12.0
Maximum continuous service
temperature in air
°F   266
Water absorption
(immersion 24 hours)
% D229 0.10

Values may vary according to brand name. Please ask your Curbell Plastics representative for more specific information about an individual brand.

Explore the physical, mechanical, thermal, electrical, and optical properties of G10/FR-4 glass epoxy.

Sort, compare, and find the plastic material suited for your application using our interactive properties table.