Epoxy/Carbon Fiber (CFRP) vs GFRP / GFK (Glass Fiber Reinforced Epoxy): 0% composition overlap. Significantly different materials serving different application areas.
Epoxy/Carbon Fiber (CFRP) vs GFRP / GFK (Glass Fiber Reinforced Epoxy)
Side-by-side chemical composition and mechanical property comparison.
Overview
Epoxy/Carbon Fiber (CFRP)
Carbon fiber reinforced epoxy — the benchmark structural composite material. Unidirectional ply: tensile strength 1500–2000 MPa, modulus 120–150 GPa at density 1.55 g/cm³ (5x stronger than steel at 1/5 the weight). Quasi-isotropic layup: UTS ~600 MPa, E ~50 GPa. Autoclave-cured prepreg (aerospace) or infusion/RTM (industrial). Used in aerospace primary structures (fuselage, wings), Formula 1 chassis, bicycle frames, wind turbine blades, pressure vessels (Type IV) and high-end sporting goods. Fiber types: T300, T700, T800, M40J, M55J.
GFRP / GFK (Glass Fiber Reinforced Epoxy)
Glass fiber reinforced epoxy composite — the cost-effective structural composite for industrial, marine and construction applications. E-glass fiber in epoxy matrix. Unidirectional: UTS ~1000 MPa, E ~40 GPa. Quasi-isotropic layup: UTS ~300 MPa, E ~18 GPa. Density 1.8–2.1 g/cm³. Electrically insulating (unlike CFRP). Used for boat hulls, wind turbine blades, chemical tanks/pipes, architectural panels, ladders, gratings, automotive body panels and electrical insulation structures.
| Epoxy/Carbon Fiber (CFRP) | GFRP / GFK (Glass Fiber Reinforced Epoxy) | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ASTM D3039 | ASTM D3039 |
Mechanical properties
| Property | Epoxy/Carbon Fiber (CFRP) | GFRP / GFK (Glass Fiber Reinforced Epoxy) | Unit |
|---|---|---|---|
| Tensile Strength | 1500–2000 | 900–1100 | MPa |
| Tensile Modulus | 120–150 | 38–45 | GPa |
| Density | 1.5–1.6 | 1.8–2.1 | g/cm³ |
Compatibility Assessment
Epoxy/Carbon Fiber (CFRP) and GFRP / GFK (Glass Fiber Reinforced Epoxy) have significantly different compositions (0% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Epoxy/Carbon Fiber (CFRP) the same as GFRP / GFK (Glass Fiber Reinforced Epoxy)?
Epoxy/Carbon Fiber (CFRP) and GFRP / GFK (Glass Fiber Reinforced Epoxy) have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace Epoxy/Carbon Fiber (CFRP) with GFRP / GFK (Glass Fiber Reinforced Epoxy)?
Generally not recommended. The compositions differ significantly (0% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Epoxy/Carbon Fiber (CFRP) and GFRP / GFK (Glass Fiber Reinforced Epoxy)?
The main differences are in the following elements: overall alloying content. Epoxy/Carbon Fiber (CFRP) is a Polymers grade, while GFRP / GFK (Glass Fiber Reinforced Epoxy) is a Polymers grade.
View full data for each material:
Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.