T800H
GB CCF-800
T800H is an intermediate-modulus, very high strength PAN carbon fiber with 5490 MPa tensile strength, 294 GPa modulus, 1.9 % elongation and 1.81 g/cm³ density, used in primary aircraft structure.
Reference datasheet — T800H is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the TOW-12K condition
T800H grades and fills
T800H is supplied in 5 conditions, soft to hard. TOW-12K is the default FabDigit quotes; the values on this page are for it.
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 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 |
Supply forms, finishes and certifications
Ways T800H is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
FABRIC-EPOXY | Woven fabric (plain/5HS) epoxy laminate, Vf ≈ 55 % | Supply form |
SIZE-10E | 10E sizing | Surface finish |
SIZE-40B | 40B sizing | Surface finish |
SIZE-50B | 50B sizing | Surface finish |
What is T800H?
T800H is an intermediate-modulus, very high strength PAN carbon fiber with 5490 MPa tensile strength, 294 GPa modulus, 1.9 % elongation and 1.81 g/cm³ density, used in primary aircraft structure. It is supplied as 6K and 12K tow with 10E, 40B and 50B sizings, and as UD epoxy, UD BMI, fabric epoxy and thermoplastic tape prepreg for autoclave, AFP and RTM processing. Cost, qualification lead time and controlled availability are the practical limits, and its abrasiveness gives a machinability score of 18, so cured parts need diamond tooling. T700S is the lower-cost option where 230 GPa modulus is acceptable. T800H has a density of 1.81 g/cm³ (0.0654 lb/in³), heavier than 62% of composite grades. T800H has a tensile strength of 5,490 MPa (796 ksi), stronger than 97% of composite grades. Elongation at break is 1.9% and the elastic modulus is 294 GPa (42.6 Msi).
What is T800H used for?
- commercial aircraft wing/fuselage
- high-performance drones
- premium bicycle frames
Advantages
- Good corrosion resistance — 92/100, better than 94% of composite grades
- Stiff — 294 GPa (42.6 Msi), better than 90% of composite grades
- Conducts heat well — 35 W/m·K (20.2 BTU/hr·ft·°F), better than 82% of composite grades
- High service temperature — 400°C (752 °F), better than 78% of composite grades
Limitations
- High embodied carbon — 34 kg CO₂/kg, worse than 85% of composite grades
- Difficult to machine — 18/100, worse than 80% of composite grades
T800H properties
Typical room-temperature values for T800H-TOW-12K; bars are the position among composite grades.
Physical1
T800H has a density of 1.81 g/cm³ (0.0654 lb/in³), heavier than 62% of composite grades.
Mechanical4
T800H has a tensile strength of 5,490 MPa (796 ksi), stronger than 97% of composite grades. Elongation at break is 1.9% and the elastic modulus is 294 GPa (42.6 Msi).
Thermal6
T800H is rated for continuous service to 400°C (752 °F). It conducts heat at 35 W/m·K (20.2 BTU/hr·ft·°F), better than 82% of composite grades. Thermal expansion is -0.56 µm/m·K (-0.311 µin/in·°F).
Electrical1
T800H 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 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's machinability is poor (18/100, worse than 80% of composite grades).
Common Calculations4
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the composite family
Yield strength against density for every composite grade FabDigit runs. T800H is highlighted; hover a dot for its name, or open the interactive family chart.
Working with T800H
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.
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) |
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.
Equivalent designations
Standards and trade names that resolve to T800H in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- GB (China)
- CCF-800
How much does T800H cost?
T800H is a high-cost composite ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
T800H — frequently asked
What is T800H used for?
T800H is typically used for commercial aircraft wing/fuselage, high-performance drones and premium bicycle frames. In short: intermediate-modulus primary structure fiber; available as thermoplastic tape; higher stiffness than T700S.
What is the tensile strength of T800H?
T800H has a typical tensile strength of 5,490 MPa (796 ksi) — stronger than 97% of composite grades. Strength varies by condition: see the 5 listed tempers.
Is T800H easy to machine?
Not especially — machinability is rated poor (18/100, worse than 80% of composite grades). Extremely abrasive and delamination-prone — use PCD or diamond-coated compression routers, high rpm/low feed, backing plates on drill exit, and HEPA extraction for conductive dust.
Can T800H be welded?
Not weldable in epoxy/BMI form; thermoplastic (PEEK/PEKK) tape versions can be resistance-, induction- or ultrasonically welded.
What surface finishes work on T800H?
Seal edges and use fiberglass isolation plies plus wet primer/sealant at aluminium interfaces to prevent galvanic corrosion; UV-protective topcoat required for outdoor service.
Can T800H be formed, bent or molded?
Laid up as UD or fabric prepreg and autoclave-cured at 177 °C/6–7 bar (epoxy) or 190–230 °C post-cure (BMI); also filament winding, RTM and AFP with slit tape.
What is the maximum service temperature of T800H?
T800H is rated for continuous use to about 400°C (752 °F), and briefly to 500°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does T800H cost?
T800H is a high-cost composite ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.