T800H UD-EPOXY
Matrix
GB CCF-800
The workhorse aerospace form — 0° laminate values for wing skins, spars and stringers.
Values for the UD-EPOXY condition
Other T800H grades and fills
T800H is listed in 5 conditions; see the grade overview at T800H.
- THERMOPLASTIC
- UD-BMI
- UD-EPOXY
- TOW-12K
- TOW-6K
Compare all 5 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
T800-class fiber in PEEK/PEKK thermoplastic tape (AFP-grade) | For weldable, tough, out-of-autoclave AFP structures with high damage tolerance and unlimited shelf life. | — | 2,450 | — | — |
UD prepreg laminate, bismaleimide matrix, Vf ≈ 60 % | Pick when service temperature exceeds epoxy capability (engine nacelle, supersonic skins, hot structure). | — | 2,700 | 1.7 | — |
UD-EPOXYThis page UD prepreg laminate, 180 °C toughened epoxy (e.g. #3900-2), Vf ≈ 60 % | The workhorse aerospace form — 0° laminate values for wing skins, spars and stringers. | — | 2,940 | 1.7 | — |
TOW-12KDefault T800HB-12000 | Standard aerospace/industrial tow for prepreg, filament winding and braiding — best cost per kg of the T800H family. | — | 5,490 | 1.9 | — |
T800HB-6000 | Finer tow for thin plies, woven fabrics and tight-radius braiding where 12K is too coarse. | — | 5,490 | 1.9 | — |
What is T800H UD-EPOXY?
T800H UD-EPOXY is T800H in the UD-EPOXY condition — the workhorse aerospace form — 0° laminate values for wing skins, spars and stringers. T800H UD-EPOXY has a tensile strength of 2,940 MPa (426 ksi), stronger than 81% of composite grades. Elongation at break is 1.7% and the elastic modulus is 152 GPa (22 Msi). T800H UD-EPOXY has a density of 1.58 g/cm³ (0.0571 lb/in³), lighter than 54% of composite grades. TOW-12K is the default condition FabDigit quotes; UD-EPOXY is available on request or by drawing note.
Advantages
- Good corrosion resistance — 92/100, better than 94% of composite grades
- Conducts heat well — 35 W/m·K (20.2 BTU/hr·ft·°F), better than 82% of composite grades
Limitations
- High embodied carbon — 34 kg CO₂/kg, worse than 85% of composite grades
- Limited service temperature — 120°C (248 °F), worse than 78% of composite grades
T800H UD-EPOXY properties
Typical room-temperature values for T800H UD-EPOXY; 15 are specific to this condition. Other listed values are T800H reference data and may not represent this condition. Bars are the position among composite grades.
Physical1
T800H UD-EPOXY has a density of 1.58 g/cm³ (0.0571 lb/in³), lighter than 54% of composite grades.
Mechanical4
T800H UD-EPOXY has a tensile strength of 2,940 MPa (426 ksi), stronger than 81% of composite grades. Elongation at break is 1.7% and the elastic modulus is 152 GPa (22 Msi).
Thermal6
T800H UD-EPOXY is rated for continuous service to 120°C (248 °F). It conducts heat at 35 W/m·K (20.2 BTU/hr·ft·°F), better than 82% of composite grades. Thermal expansion is -0.3 µm/m·K (-0.167 µin/in·°F).
Electrical1
T800H UD-EPOXY has an electrical resistivity of 1.4×10⁻⁵ Ω·m.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 94% of composite grades. UV resistance is excellent.
Sustainability4
Producing a kilogram of T800H UD-EPOXY takes about 500 MJ of energy and emits 34 kg of CO₂ — more than 84% of composite grades. Typical recycled content is 0%.
Manufacturability1
T800H UD-EPOXY's machinability is poor (25/100, worse than 65% of composite grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with T800H UD-EPOXY
Is T800H easy to machine?
Extremely abrasive and delamination-prone — use PCD or diamond-coated compression routers, high rpm/low feed, backing plates on drill exit, and HEPA extraction for conductive dust.
Can T800H be welded?
Not weldable in epoxy/BMI form; thermoplastic (PEEK/PEKK) tape versions can be resistance-, induction- or ultrasonically welded.
Can T800H be formed, bent or molded?
Laid up as UD or fabric prepreg and autoclave-cured at 177 °C/6–7 bar (epoxy) or 190–230 °C post-cure (BMI); also filament winding, RTM and AFP with slit tape.
What surface finishes work on T800H?
Seal edges and use fiberglass isolation plies plus wet primer/sealant at aluminium interfaces to prevent galvanic corrosion; UV-protective topcoat required for outdoor service.
T800H chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Nresidual nitrogen from PAN precursor | 3 – 6 | 5 |
| Osurface oxygen from electrolytic surface treatment | 0.5 – 2 | 1 |
| epoxy sizing50B/10E/40B sizing add-on, wt% | 0.5 – 1.5 | 1 |
| CPAN-derived carbon content | ≥ 93 (balance) | — |
T800H UD-EPOXY — frequently asked
What is T800H UD-EPOXY used for?
T800H UD-EPOXY is typically used for commercial aircraft wing/fuselage, high-performance drones and premium bicycle frames. In short: intermediate-modulus primary structure fiber; available as thermoplastic tape; higher stiffness than T700S.
What is the tensile strength of T800H UD-EPOXY?
T800H UD-EPOXY has a typical tensile strength of 2,940 MPa (426 ksi) — stronger than 81% of composite grades. Strength varies by condition: see the 5 listed tempers.
Is T800H UD-EPOXY easy to machine?
Not especially — machinability is rated poor (25/100, worse than 65% of composite grades). Extremely abrasive and delamination-prone — use PCD or diamond-coated compression routers, high rpm/low feed, backing plates on drill exit, and HEPA extraction for conductive dust.
Can T800H UD-EPOXY be welded?
Not weldable in epoxy/BMI form; thermoplastic (PEEK/PEKK) tape versions can be resistance-, induction- or ultrasonically welded.
What surface finishes work on T800H UD-EPOXY?
Seal edges and use fiberglass isolation plies plus wet primer/sealant at aluminium interfaces to prevent galvanic corrosion; UV-protective topcoat required for outdoor service.
Can T800H UD-EPOXY be formed, bent or molded?
Laid up as UD or fabric prepreg and autoclave-cured at 177 °C/6–7 bar (epoxy) or 190–230 °C post-cure (BMI); also filament winding, RTM and AFP with slit tape.
What is the maximum service temperature of T800H UD-EPOXY?
T800H UD-EPOXY is rated for continuous use to about 120°C (248 °F), and briefly to 500°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- TORAYCA T800H Technical Data Sheet (fiber and composite properties) — Toray Industries (2023)
- ASM Handbook Vol. 21 — Composites — ASM International (2001)
- CMH-17 Composite Materials Handbook, Vol. 2 — Polymer Matrix Composites Material Properties — SAE International (2012)
- GB/T 3362 Test methods for tensile properties of carbon fiber multifilament — SAC (2017)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.