Epoxy/Carbon Fiber (CFRP) vs PEEK (unfilled): 0% composition overlap. Significantly different materials serving different application areas.
Epoxy/Carbon Fiber (CFRP) vs PEEK (unfilled)
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.
PEEK (unfilled)
Polyetheretherketone — the premium engineering thermoplastic. Exceptional mechanical properties maintained to 260°C continuous use. Resistant to virtually all organic solvents and acids. Biocompatible (ASTM F2026). Used as metal replacement in aerospace, automotive engine parts, medical implants (spinal cages), semiconductor wafer handling, and oil/gas downhole seals.
| Epoxy/Carbon Fiber (CFRP) | PEEK (unfilled) | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ASTM D3039 | ISO 10350 |
Chemical composition (wt%) — Pro
| Element | Epoxy/Carbon Fiber (CFRP) | PEEK (unfilled) | Overlap |
|---|---|---|---|
| Epoxy Resin Matrix | 30–40% | — | — |
| Carbon Fiber Reinforcement | 60–70% | — | — |
| Base Polymer (Polyether Ether Ketone) | — | 99–99.9% | — |
Mechanical properties — Pro
| Property | Epoxy/Carbon Fiber (CFRP) | PEEK (unfilled) | Unit |
|---|---|---|---|
| Tensile Strength | 1500–2000 | — | MPa |
| Tensile Modulus | 120–150 | — | GPa |
| Density | 1.5–1.6 | — | g/cm³ |
| Fiber Volume Fraction | |||
| Glass Transition Temp (Tg) | |||
| Interlaminar Shear Strength | |||
| Tensile Strength | |||
| Yield Strength | |||
| Elongation | |||
| Elastic Modulus | |||
| Density | |||
| Glass Transition Temp (Tg) | |||
| Melting Point | |||
| Continuous Use Temp |
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Epoxy/Carbon Fiber (CFRP) and PEEK (unfilled) 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 PEEK (unfilled)?
Epoxy/Carbon Fiber (CFRP) and PEEK (unfilled) have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace Epoxy/Carbon Fiber (CFRP) with PEEK (unfilled)?
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 PEEK (unfilled)?
The main differences are in the following elements: overall alloying content. Epoxy/Carbon Fiber (CFRP) is a Polymers grade, while PEEK (unfilled) is a Polymers grade.
Related Comparisons
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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.