CCF700
also T700
CCF700 is a high-strength PAN-based carbon fiber of the T700 class, supplied as 12K and 24K tow, the CCF700S variant, UD and plain-weave epoxy prepreg, UD BMI prepreg and filament-winding grades for vessels.
Reference datasheet — CCF700 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
CCF700 grades and fills
CCF700 is supplied in 7 conditions, soft to hard. TOW-12K is the default FabDigit quotes; the values on this page are for it.
Compare all 7 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Plain/twill woven fabric epoxy laminate, Vf ≈ 55% (warp) | Pick the 3K/12K woven prepreg laminate for shells, panels and visible parts where balanced biaxial properties and drape over curvature matter more than peak 0° stiffness. | 850 | 1.4 | ||
Unidirectional BMI / high-Tg matrix laminate | Choose the BMI matrix when the laminate must serve continuously at 180–230 °C, as in engine nacelles and high-speed vehicle skins; Tg 280 °C comes with a higher cure temperature. | 2,300 | 1.6 | ||
Unidirectional epoxy laminate, Vf ≈ 60% | Most common laminate form: use the Vf ≈ 60% unidirectional layup for aircraft and UAV primary structure and design to the quoted 0° properties, since transverse strength is resin-limited. | 2,450 | 1.7 | ||
Filament-wound epoxy composite (NOL ring / hoop direction) | Use these wet-wound hoop values, measured by NOL ring test, when sizing high-pressure gas cylinders and rocket motor cases; the epoxy limits service to 110 °C. | 2,500 | 1.8 | ||
24K dry tow | Choose the industrial large tow to cut cost in wound gas cylinders, wind energy parts and civil strengthening; resin wet-out is slightly poorer than with small tow. | 4,800 | 2 | ||
TOW-12KDefault 12K dry tow | Standard supply form: specify the 800 tex sized 12K dry tow for prepreg, filament winding and pultrusion lines, with 4900 MPa tensile strength measured on the dry fiber. | 4,900 | 2.1 | ||
Dry-jet wet-spun high-strength variant | Specify the dry-jet wet-spun variant when a smoother fiber surface and 5100 MPa tensile strength are needed, as in aerospace parts and high-pressure gas cylinders. | 5,100 | 2.1 |
What is CCF700?
CCF700 is a high-strength PAN-based carbon fiber of the T700 class, supplied as 12K and 24K tow, the CCF700S variant, UD and plain-weave epoxy prepreg, UD BMI prepreg and filament-winding grades for vessels. It is chosen for 4900 MPa tensile strength, 2.1 % elongation and 230 GPa modulus at 1.8 g/cm3, with fiber stability to 350 °C, and is widely used for wound pressure vessels. The fiber is abrasive (machinability score 25), laminates are not weldable and the epoxy matrix sets the working temperature. CCF300/T300 is the lower-cost standard grade; HTS40 is an equivalent-class alternative. CCF700 has a density of 1.8 g/cm³ (0.065 lb/in³), heavier than 59% of composite grades. CCF700 has a tensile strength of 4,900 MPa (711 ksi), stronger than 95% of composite grades. Elongation at break is 2.1% and the elastic modulus is 230 GPa (33.4 Msi).
What is CCF700 used for?
- domestic aircraft structures
- hydrogen tanks
- wind turbine blades
- automotive parts
Advantages
- Stiff — 230 GPa (33.4 Msi), better than 82% of composite grades
CCF700 properties
Typical room-temperature values for CCF700-TOW-12K; bars are the position among composite grades.
Physical1
CCF700 has a density of 1.8 g/cm³ (0.065 lb/in³), heavier than 59% of composite grades.
Mechanical4
CCF700 has a tensile strength of 4,900 MPa (711 ksi), stronger than 95% of composite grades. Elongation at break is 2.1% and the elastic modulus is 230 GPa (33.4 Msi).
Thermal6
CCF700 is rated for continuous service to 350°C (662 °F). It conducts heat at 9 W/m·K (5.2 BTU/hr·ft·°F), better than 70% of composite grades. Thermal expansion is -0.38 µm/m·K (-0.211 µin/in·°F).
Electrical1
CCF700 has an electrical resistivity of 1.6×10⁻⁵ Ω·m.
Chemical & Environmental3
Corrosion resistance is excellent (85/100), better than 65% of composite grades. UV resistance is good.
Sustainability3
Producing a kilogram of CCF700 takes about 280 MJ of energy and emits 24 kg of CO₂ — more than 63% of composite grades. Typical recycled content is 0%.
Manufacturability2
CCF700's machinability is poor (25/100, worse than 65% 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. CCF700 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CCF700
Is CCF700 easy to machine?
Machine only with diamond-coated or PCD tooling at high speed and small feed. Use backing plates to prevent delamination and extract dust under negative pressure, since conductive dust can short electrical equipment.
Can CCF700 be welded?
Not weldable; join by structural epoxy adhesive bonding or mechanical fasteners. Use titanium or stainless fasteners with insulating washers to avoid galvanic corrosion.
Can CCF700 be formed, bent or molded?
Dry fiber is wound, braided or fiber-placed; prepreg is cured in an autoclave at 0.3–0.6 MPa and 120–180 °C, or press moulded, RTM or vacuum infused. Fix fiber orientation and fiber volume fraction by ply sequence before cure.
CCF700 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 | 2 – 5 | 3.5 |
| Osurface oxidation from electrolytic treatment | 0.5 – 2 | 1 |
| H | 0 – 0.5 | 0.2 |
| epoxy sizingsizing content, epoxy-compatible size | 0.8 – 1.5 | 1.2 |
| Na+K (metal ions) | 0 – 0.01 | 0 |
| Ccarbonized PAN fiber | ≥ 93 (balance) |
What surface finishes work on CCF700?
Sand the surface and apply primer or clear coat for UV protection. A surface veil or adhesive film improves appearance, and any exposed fiber should be sealed with additional resin.
Equivalent designations
Standards and trade names that resolve to CCF700 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- T700
How much does CCF700 cost?
CCF700 is a high-cost composite ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
CCF700 — frequently asked
What is CCF700 used for?
CCF700 is typically used for domestic aircraft structures, hydrogen tanks, wind turbine blades and automotive parts. In short: T700-class high strength; 4900 MPa tensile strength; pressure-vessel winding grade.
What is the tensile strength of CCF700?
CCF700 has a typical tensile strength of 4,900 MPa (711 ksi) — stronger than 95% of composite grades. Strength varies by condition: see the 7 listed tempers.
Is CCF700 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 65% of composite grades). Machine only with diamond-coated or PCD tooling at high speed and small feed. Use backing plates to prevent delamination and extract dust under negative pressure, since conductive dust can short electrical equipment.
Can CCF700 be welded?
Not weldable; join by structural epoxy adhesive bonding or mechanical fasteners. Use titanium or stainless fasteners with insulating washers to avoid galvanic corrosion.
What surface finishes work on CCF700?
Sand the surface and apply primer or clear coat for UV protection. A surface veil or adhesive film improves appearance, and any exposed fiber should be sealed with additional resin.
Can CCF700 be formed, bent or molded?
Dry fiber is wound, braided or fiber-placed; prepreg is cured in an autoclave at 0.3–0.6 MPa and 120–180 °C, or press moulded, RTM or vacuum infused. Fix fiber orientation and fiber volume fraction by ply sequence before cure.
What is the maximum service temperature of CCF700?
CCF700 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does CCF700 cost?
CCF700 is a high-cost composite ($$$$), 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
- ASTM D4018 Standard Test Methods for Properties of Continuous Filament Carbon and Graphite Fiber Tows — ASTM (2017)
- ASM Handbook Vol. 21: Composites — ASM International (2001)
- MMPDS / CMH-17 carbon-epoxy lamina typical values — CMH-17 / Battelle (2019)
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.