Unidirectional carbon Technical Data Sheet

Unidirectional carbon at a glance

Unidirectional carbon schematic — Schematic

Designation

Item	Value
Designation	Unidirectional carbon
Class	Composites
Type	carbon tape and unidirectional fabric

Strength along and across the fiber (Toray T700S/epoxy, 60% fiber volume)

Direction	Tensile strength	Tensile modulus	Ratio to 0° strength
0° (along fiber)	415 ksi (2,860 MPa)	19 Msi (134 GPa)	100%
90° (across fiber)	12 ksi (81 MPa)	—	about 3% (calculated)
In-plane shear	20 ksi (136 MPa)	—	about 5% (calculated)

Toray T700S data sheet, composite properties normalised to 60% fiber volume, cured with epoxy at 130 °C. T800S gives 477 ksi / 11 ksi (3,290 / 79 MPa). Ratios calculated by The Aviation Point.

Carbon tape prepreg (HexPly 8552)

Property	Carbon tapes
Resin content	33–38%
Flow	10–22%
Volatiles	1.0% max
Gel time at 350 °F	12–22 min

HexPly 8552 data sheet, US units, 2020.

Notes from the guide

Ratios are for one fiber and resin pair.
Not a ply design. The SRM gives plies, angles and cure.

Where to buy

AmericaDistributor coming soonOur partner for this region is on its way

EuropeDistributor coming soonOur partner for this region is on its way

OceaniaDistributor coming soonOur partner for this region is on its way

Distributors coming soon.

Keep going

Calculators

Guides

Data sheets

Sources

Toray Composite Materials America, TORAYCA T700S Standard Modulus Carbon Fiber Data Sheet (Rev. 11/24/2025) — fiber and composite properties, tow sizes, resin compatibility.
Toray Composite Materials America, TORAYCA T800S Intermediate Modulus Carbon Fiber Data Sheet (Rev. 04/13/2018) — fiber and composite properties, tow sizes, resin compatibility.
Hexcel HexPly 8552 Product Data Sheet (US units, 2020) — neat resin properties, prepreg physical properties, cure procedure, storage life.
FAA-H-8083-31B, AMT Handbook — Airframe, Volume 1 (2023), Chapter 7 — unidirectional and bidirectional (Figure 7-1); ply orientation (Figures 7-2 and 7-3, p. 7-3).