Carbon Fiber (CFRP) Round Tube
Precision-pultruded carbon fiber reinforced polymer (CFRP) round tubes built for lightweight OEM components and structural assemblies where stiffness-to-weight ratio is the top priority. Contact us for custom diameters and wall schedules.
Customized service:
Diameter Wall thickness Length
Surface finish Cut to size
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Haikuo’s CFRP round tubes are pultruded from continuous carbon fiber rovings bonded in a high-performance epoxy or vinyl ester resin matrix, producing a structural tube that’s both notably lighter and stiffer than an equivalent fiberglass (GFRP) or aluminum section.
Fiberglass tubing already beats steel on weight and corrosion resistance, but CFRP round tubes push the strength-to-weight ratio even further, making them the preferred material for weight-critical OEM assemblies, robotics arms, drone frames, and portable structural components where every gram matters.
CFRP Round Tube Features
Here’s what sets CFRP round tube apart from conventional alternatives:
- Excellent Stiffness-to-Weight: Carbon fiber offers a modulus of elasticity several times that of glass fiber, at a fraction of the weight of metal.
- Zero Corrosion: Unaffected by moisture, salt spray, and most industrial chemicals, so no coatings or maintenance are needed.
- Dimensional Precision: Tight pultrusion tolerances make it suitable for precision OEM assemblies and interfacing components.
- Low Thermal Expansion: A near-zero coefficient of thermal expansion keeps assemblies dimensionally stable through temperature swings.
- Fatigue Resistance: Strong resistance to cyclic loading makes CFRP tube well suited to vibration-prone equipment.
Key Advantages of Haikuo CFRP Round Tube
Haikuo’s CFRP round tubes pair premium carbon fiber reinforcement with precision pultrusion tooling, giving OEM customers a drop-in lightweight replacement for aluminum and steel round tube in structural and motion-critical assemblies.
Performance Parameters
The table below lists the main performance parameters for CFRP round tube:
| Parameter | Unit | Value |
| Tensile strength | MPa | 1200 |
| Bending strength | MPa | 900 |
| Modulus of elasticity | GPa | 130 |
| Density | g/cm³ | 1.6 |
Specification Parameters
The table below lists the main specification parameters for CFRP round tube:
| Parameter | Unit | Range |
| Outer diameter | mm | 6~200 |
| Wall thickness | mm | 0.5~10 |
| Length | m | 0.5~6 |
| Surface finish | – | Matte, glossy, twill weave |
Applications & Deployments Worldwide
CFRP round tube gets specified anywhere weight reduction directly improves system performance:
- Robotics & Automation: Used in robot arm links, gantry structures, and end-effector supports, where lower moving mass improves speed and precision.
- Drone & UAV Frames: Serving as airframe booms and structural members for fixed-wing and multi-rotor platforms.
- Portable Structural Equipment: Found in camera rigs, antenna masts, and field equipment stands that need rapid assembly.
- Sporting & Precision Goods: Used in high-performance poles, frames, and structural inserts.
Pultrusion Engineering & Quality Assurance
Every batch of CFRP round tube is checked for fiber volume fraction, wall concentricity, and surface finish before release. Haikuo keeps dedicated carbon fiber pultrusion tooling separate from our glass fiber lines, avoiding cross-contamination and preserving laminate quality.
Technical Summary & Engineering Insights
Haikuo CFRP round tubes are precision pultruded from continuous carbon fiber for OEM and structural applications where weight is the primary design constraint. They deliver a stiffness-to-weight ratio well beyond glass fiber composite or aluminum alternatives while retaining full corrosion immunity and dimensional stability, and are fully customizable in diameter, wall thickness, and surface finish for OEM integration.
| Structural Property | Haikuo CFRP round tube | Aluminum Tube | GFRP Round Tube |
|---|---|---|---|
| Weight Efficiency Index | Ultra-Lightweight (~40% of aluminum) | Light | Light (heavier than CFRP) |
| Stiffness-to-Weight Ratio | Excellent (high modulus carbon fiber) | Good | Moderate |
| Corrosion & Rust Immunity | 100% Resistant | Good (may pit/corrode) | 100% Resistant |
| Electrical Conductivity | Conductive (carbon fiber) | Conductive | Non-Conductive |
| Typical Unit Cost | Higher (premium reinforcement) | Moderate | Lower |
Targeted Product FAQ
Q1: How does CFRP round tube compare to aluminum for weight-critical OEM parts?
A1: A Haikuo CFRP round tube typically weighs 30-40% less than an aluminum tube of equivalent stiffness, which is why it is increasingly specified for robotics, drone, and portable-equipment structures.
Q2: Is CFRP tube electrically conductive?
A2: Yes — unlike glass fiber composite, carbon fiber is electrically conductive. If your application requires electrical insulation, our GFRP round tube is the correct choice instead.
Q3: What surface finishes are available?
A3: We offer matte, glossy, and visible twill-weave surface finishes depending on the cosmetic and grip requirements of your assembly.
Q4: Can you match specific stiffness targets for a custom assembly?
A4: Yes. Send us your load case and deflection limit and our engineering team will recommend the wall thickness and fiber layup to meet it.
Q5: What is the minimum order quantity for custom CFRP tube dimensions?
A5: MOQ depends on diameter and tooling availability — contact us with your drawing and we will confirm feasibility and minimum quantity within 24 hours.