Epoxy/Carbon Fiber (CFRP) vs PBT GF30: 0% composition overlap. Significantly different materials serving different application areas.
Epoxy/Carbon Fiber (CFRP) vs PBT GF30
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.
PBT GF30
Polybutylene Terephthalate with 30% glass fiber — THE connector and electrical component material. Key advantage over PA6 GF30: near-zero moisture absorption (0.02-0.2%), so mechanical and electrical properties are stable regardless of humidity. Lower UTS than PA6 GF30 but consistent. Trade names include Ultradur B4300 G6 (BASF), Valox 420 (SABIC), Celanex (Celanese), Crastin (DuPont). Used for electrical connectors, relay housings, coil formers, automotive sensors, and any part requiring dimensional stability in humid environments.
| Epoxy/Carbon Fiber (CFRP) | PBT GF30 | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ASTM D3039 | ISO 10350 |
Chemical composition (wt%) — Pro
| Element | Epoxy/Carbon Fiber (CFRP) | PBT GF30 | Overlap |
|---|---|---|---|
| Epoxy Resin Matrix | 30–40% | — | — |
| Carbon Fiber Reinforcement | 60–70% | — | — |
| PBT (Base Polymer) | — | 68–72% | — |
| Glass Fiber Reinforcement | — | 28–32% | — |
Mechanical properties — Pro
| Property | Epoxy/Carbon Fiber (CFRP) | PBT GF30 | Unit |
|---|---|---|---|
| Tensile Strength | 1500–2000 | 130–150 | MPa |
| Tensile Modulus | 120–150 | 10000–12000 | GPa |
| Density | 1.5–1.6 | 1.52–1.55 | g/cm³ |
| Fiber Volume Fraction | |||
| Glass Transition Temp (Tg) | |||
| Interlaminar Shear Strength | |||
| Tensile Strength | |||
| Elongation | |||
| Elastic Modulus | |||
| Density | |||
| hdt_1_8mpa | |||
| Melting Point | |||
| Water Absorption (24h) | |||
| Elongation at Break | |||
| Charpy Impact (notched) | |||
| Melting Point | |||
| HDT/A (1.8 MPa) | |||
| Water Absorption (24h) | |||
| Glass Fiber Content |
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Epoxy/Carbon Fiber (CFRP) and PBT GF30 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 PBT GF30?
Epoxy/Carbon Fiber (CFRP) and PBT GF30 have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace Epoxy/Carbon Fiber (CFRP) with PBT GF30?
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 PBT GF30?
The main differences are in the following elements: overall alloying content. Epoxy/Carbon Fiber (CFRP) is a Polymers grade, while PBT GF30 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.