Material · Composites
G10/FR4 Glass Epoxy
The insulator that carries load: glass-epoxy laminate with metal-adjacent strength and full dielectric duty.
Price index: $$
Machinability
2/5
Corrosion resistance
4/5
Strength
310 MPa (lengthwise)
Value for money
$$
Material properties
| Parameter | Value |
|---|---|
| Tensile strength | 310 MPa (lengthwise) |
| Yield strength | — (anisotropic) |
| Hardness | M110 (Rockwell) |
| Density | ~1.8 g/cm³ |
Choose it when
You need an insulator that is also a structural part: G10/FR4 carries bolt loads and bending that would crush unfilled plastics, while staying dielectric, dimensionally stable and flame-rated (FR4).
Look elsewhere when
Cost-per-feature matters: glass fibers chew carbide tooling and demand dust extraction, raising machining cost. For non-electrical fixtures, POM or aluminum machine far cheaper.
Typical applications
- Electrical insulating plates and busbar supports
- PCB test fixtures and bed-of-nails plates
- Structural spacers in battery and energy systems
- Cryogenic and vacuum fixture components
Compared with similar grades
| Property | G10/FR4 Glass Epoxy | Carbon Fiber Sheet |
|---|---|---|
| Tensile strength | 310 MPa (lengthwise) | ~600 MPa (quasi-isotropic) |
| Yield strength | — (anisotropic) | — (anisotropic) |
| Hardness | M110 (Rockwell) | — (laminate) |
| Density | ~1.8 g/cm³ | ~1.55 g/cm³ |
| Price index | $$ | $$$$ |
| Machinability | 2/5 | 2/5 |
Have a part in mind?
Upload your CAD file and get a price range in about 60 seconds. NDA-protected from the first byte.
Get instant estimate