Overview
T700 Carbon Fiber is a high-strength, intermediate-performance PAN-based carbon fiber widely used in aerospace, automotive, sporting goods, industrial equipment, and advanced composite structures. It is considered one of the most popular carbon fiber grades globally due to its exceptional combination of high tensile strength, lightweight construction, excellent fatigue resistance, and cost-effective performance.
Compared with T300 carbon fiber, T700 offers significantly higher tensile strength while maintaining similar modulus, making it ideal for structural applications requiring increased load-bearing capability without additional weight.
T700 Carbon Fiber is widely used in:
- Aerospace Structures
- UAV & Drone Frames
- Automotive Components
- Wind Energy Blades
- Sporting Goods
- Marine Structures
- Industrial Equipment
- Robotics Systems
Due to its excellent balance of performance and affordability, T700 has become a benchmark material in modern composite manufacturing.
Material Specification
| Property | Value |
|---|---|
| Material Designation | T700 |
| Full Name | T700 High-Strength Carbon Fiber |
| Material Family | PAN-Based Carbon Fiber |
| Fiber Type | Continuous Carbon Filament |
| Density | 1.80 g/cm³ |
| Appearance | Black |
| Filament Count Options | 3K, 6K, 12K, 24K |
| Standard Forms | Tow, Fabric, Prepreg, Composite Laminate |
Material Composition
T700 is manufactured from high-performance PAN precursor fibers.
| Component | Function |
|---|---|
| Carbon Filaments | Structural Reinforcement |
| Epoxy Resin (Typical Matrix) | Load Transfer |
| Surface Treatment | Fiber-Matrix Bonding |
| Sizing Agent | Processing Enhancement |
The fiber structure is optimized for high tensile strength and structural reliability.
Common T700 Product Forms
| Form | Characteristics |
|---|---|
| T700 3K Fabric | Lightweight Components |
| T700 6K Fabric | Structural Applications |
| T700 12K Fabric | Industrial Components |
| T700 UD Tape | Maximum Directional Strength |
| T700 Prepreg | Aerospace Manufacturing |
| T700 Composite Plate | High-Performance Structures |
Mechanical Properties
Fiber Properties
| Property | Value |
|---|---|
| Tensile Strength | 4,900 MPa |
| Tensile Modulus | 230 GPa |
| Elongation at Break | 2.1% |
| Compressive Strength | Excellent |
| Fatigue Resistance | Outstanding |
Mechanical Performance
| Property | Performance |
|---|---|
| Strength | Outstanding |
| Stiffness | Excellent |
| Fatigue Resistance | Outstanding |
| Impact Resistance | Good |
T700 offers approximately 40% greater tensile strength than T300 carbon fiber.
Physical Properties
| Property | Value |
|---|---|
| Density | 1.80 g/cm³ |
| Carbon Content | >92% |
| Moisture Absorption | Negligible |
| Dimensional Stability | Outstanding |
| Weight Reduction vs Steel | Up to 80% |
T700 provides exceptional structural efficiency while maintaining low weight.
Thermal Properties
| Property | Value |
|---|---|
| Coefficient of Thermal Expansion | Near Zero |
| Thermal Conductivity | 8–25 W/m·K |
| Thermal Stability | Excellent |
| Continuous Composite Service Temperature | 120–180°C |
| High Temperature Capability (Fiber) | >2000°C (Non-Oxidizing Environment) |
The near-zero thermal expansion supports precision engineering applications.
Strength-to-Weight Ratio
| Material | Density (g/cm³) | Tensile Strength |
|---|---|---|
| T700 Carbon Fiber | 1.80 | 4,900 MPa |
| T300 Carbon Fiber | 1.76 | 3,530 MPa |
| Aluminum 6061 | 2.70 | 310 MPa |
| Titanium Grade 5 | 4.43 | 950 MPa |
T700 offers one of the highest specific strengths among commercially available structural materials.
Electrical Properties
Typical Values
| Property | Value |
|---|---|
| Electrical Conductivity | Moderate |
| Surface Resistivity | Low |
| Static Dissipation | Excellent |
| EMI Shielding Capability | Good |
| Conductive Material | Yes |
Electrical Performance
| Property | Performance |
|---|---|
| Electrical Conductivity | Good |
| EMI Shielding | Good |
| Static Control | Excellent |
| Electronics Applications | Suitable |
Like most carbon fibers, T700 is electrically conductive.
Corrosion Resistance
| Environment | Performance |
|---|---|
| Fresh Water | Excellent |
| Salt Water | Excellent |
| Industrial Atmosphere | Excellent |
| Oils & Greases | Excellent |
| Outdoor Exposure | Excellent |
T700 composites provide excellent long-term environmental durability.
Fatigue Resistance
| Property | Performance |
|---|---|
| Cyclic Loading Resistance | Outstanding |
| Structural Durability | Outstanding |
| Vibration Resistance | Excellent |
| Long-Term Reliability | Outstanding |
T700 is widely used in fatigue-critical aerospace and sporting applications.
Chemical Resistance
| Chemical Environment | Performance |
|---|---|
| Water | Excellent |
| Fuels | Excellent |
| Oils | Excellent |
| Alcohols | Excellent |
| Mild Acids | Good |
| Mild Alkalis | Good |
Chemical resistance is primarily determined by the selected resin matrix.
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| Hand Layup | Outstanding |
| Vacuum Infusion | Outstanding |
| Compression Molding | Excellent |
| Resin Transfer Molding (RTM) | Excellent |
| Autoclave Processing | Outstanding |
T700 is compatible with most advanced composite manufacturing methods.
Machinability
| Process | Rating |
|---|---|
| CNC Milling | Excellent |
| CNC Drilling | Excellent |
| Waterjet Cutting | Outstanding |
| Precision Machining | Excellent |
Carbide and diamond-coated tools are recommended for optimal machining performance.
International Standards
| Standard | Equivalent |
|---|---|
| ASTM Composite Standards | Applicable |
| ISO Carbon Fiber Standards | Applicable |
| Aerospace Composite Standards | Applicable |
| Automotive Composite Standards | Applicable |
| GB/T (China) | T700级碳纤维 |
Available Forms
| Product Type | Availability |
|---|---|
| Carbon Fiber Tow | Yes |
| Woven Fabric | Yes |
| Prepreg | Yes |
| Composite Sheet | Yes |
| Composite Plate | Yes |
| Machined Parts | Yes |
Typical Applications
Aerospace Industry
- Aircraft Structures
- UAV Frames
- Satellite Components
- Aerospace Panels
Automotive Industry
- Monocoque Structures
- Body Panels
- Racing Components
- EV Lightweight Parts
Wind Energy
- Wind Turbine Blades
- Structural Reinforcements
- Composite Spars
Sporting Goods
- Bicycle Frames
- Tennis Rackets
- Golf Shafts
- Fishing Rods
Marine Industry
- Racing Yacht Structures
- Boat Components
- Offshore Equipment
Robotics
- Lightweight Robotic Arms
- Structural Frames
- Automation Equipment
Advantages
High Tensile Strength
Provides significantly greater strength than standard carbon fiber grades.
Outstanding Strength-to-Weight Ratio
Enables substantial weight reduction in structural applications.
Excellent Fatigue Resistance
Maintains performance under repeated loading conditions.
Proven Aerospace Performance
Widely used in aerospace and high-performance engineering applications.
Excellent Corrosion Resistance
Suitable for harsh and marine environments.
Cost-Effective High Performance
Offers premium strength without the cost of ultra-high-performance grades.
Limitations
Higher Cost Than T300
Additional strength comes with increased material cost.
Conductive Material
Electrical isolation may be required in some applications.
Brittle Impact Behavior
Can fracture under severe localized impact.
Specialized Manufacturing Requirements
Requires composite fabrication expertise.
Comparison with Carbon Fiber Grades
| Property | T300 | T700 | T800 |
|---|---|---|---|
| Tensile Strength | 3,530 MPa | 4,900 MPa | 5,500+ MPa |
| Tensile Modulus | 230 GPa | 230 GPa | 294 GPa |
| Elongation | 1.5% | 2.1% | 1.9% |
| Cost | Lower | Moderate | Higher |
| Industrial Usage | Very High | Very High | High |
Comparison with T300 Carbon Fiber
| Property | T700 | T300 |
|---|---|---|
| Tensile Strength | Higher | |
| Fatigue Resistance | Better | |
| Structural Performance | Better | |
| Cost | Higher | |
| Aerospace Applications | More Common |
T700 is often selected when higher structural performance is required without moving to premium aerospace-grade fibers.
Available Surface Finishes
Standard Finishes
- Plain Weave
- Twill Weave
- Satin Weave
Functional Finishes
- Aerospace Grade Surface
- Structural Composite Finish
- UV Resistant Coating
Specialty Configurations
- T700 3K Carbon Fiber
- T700 6K Carbon Fiber
- T700 12K Carbon Fiber
- T700 UD Tape
- T700 Prepreg
Frequently Asked Questions (FAQ)
What is T700 Carbon Fiber?
T700 is a high-strength PAN-based carbon fiber widely used in aerospace, automotive, industrial, and sporting goods applications.
What is T700 Carbon Fiber used for?
Typical applications include:
- Aircraft Structures
- UAV Frames
- Automotive Components
- Wind Turbine Blades
- Sporting Equipment
Is T700 stronger than T300?
Yes. T700 offers approximately 4,900 MPa tensile strength compared with approximately 3,530 MPa for T300.
Is T700 lightweight?
Yes. T700 maintains a density of approximately 1.80 g/cm³ while delivering extremely high strength.
Why is T700 Carbon Fiber popular?
Because it provides an excellent combination of high strength, low weight, fatigue resistance, and cost efficiency.
Why choose T700 Carbon Fiber?
Because it combines:
- High Tensile Strength
- Lightweight Construction
- Excellent Fatigue Resistance
- Corrosion Resistance
- Aerospace-Grade Reliability
What is the difference between T700 and T800?
T800 provides higher strength and modulus, while T700 offers a more economical solution with outstanding structural performance.
Does GCNOV provide T700 Carbon Fiber manufacturing services?
Yes. GCNOV provides:
- T700 Carbon Fiber Component Manufacturing
- Composite Fabrication
- CNC Machining Services
- Structural CFRP Components
- Prototype Development
- Low-Volume Production
- Mass Production