Carbon Fiber Round Tubes - China

Product Definition‌

Carbon fiber round tubes are high-performance hollow structural components made from ‌PAN-based or pitch-based carbon fibers‌ reinforced with ‌thermoset resins‌ (epoxy, polyester, or phenolic).

Manufactured via ‌pultrusion, filament winding, or compression molding‌, these tubes combine ‌lightweight design, extreme strength, corrosion resistance, and tailor-made properties‌ for industrial applications.

‌Materials & Manufacturing‌

‌Fiber Specifications‌

‌Standard Grades‌: T300, T700, T800, T1000

‌High Modulus‌: M40J, M55J, M60J

‌Surface Patterns‌: 3K/12K plain weave, twill weave, UD unidirectional, hybrid layup

‌Resin Systems‌

‌Standard Epoxy‌: For temperatures ≤120°C

‌High-Temp Epoxy‌: Stable at ‌-50°C to 180°C‌ (short-term 200°C)

‌Flame-Retardant Epoxy‌: UL94-V0 compliant (aviation/railway approved)

‌Production Processes‌

Process Key Advantages Tolerance Best For

‌Pultrusion‌ Conti nuous production, straightness ±0.05 mm High-volume standard tubes

‌Filament Winding‌ Adjustable fiber angles (hoop/spiral) ±0.1 mm High-pressure/torsiona l loads

‌Compression Molding‌ Complex shapes, localized thickening ±0.02 mm Precision-assembly parts

‌Post-Processing‌

‌Surface Finish‌: Matte/glossy, 3K twill, UV coating, nickel plating

‌Machining‌: CNC turning, milling, drilling, threading, metal sleeve bonding

‌Main Product Specifications‌

Parameter Range Precis ion Grade

Outer Diameter (OD) 1–800 mm (customizable) –

Wall Thickness (WT) 0.2–10 mm –

Length (L) 0.1–10 m (max 10 m for pultrusion) –

Straightness ≤0.3 mm/m ‌≤0.1 mm/m‌

Roundness ≤0.05 mm ‌≤0.02 mm‌

‌Mechanical Properties‌

Property Value vs.

Metals

Density 1.55 g/cm³ ‌80% lighter than steel‌

Tensile Strength 3,000–3,500 MPa ‌6–12x stronger than steel‌

Elastic Modulus 165–230 GPa ‌3x stiffer than aluminum‌

Interlaminar Shear 80–110 MPa Superior to aluminum

CTE <1.5×10⁻⁶/ °C ‌1/10 of steel‌ (thermal stable)

Corrosion Resistance No rust in pH 3–11, salt spray ≥1,000 hrs

Fatigue Life 10⁷ cycles @ 90% strength retention

‌Key Advantages‌

✅ ‌Ultra-Lightweight‌: 30–50% lighter than aluminum, 70%+ vs.

steel at equal stiffness.

✅ ‌High Strength-to-Weight‌: Replaces steel/titanium in dynamic load applications.

✅ ‌Corrosion-Free‌: Ideal for marine, chemical, and high-humidity environments.

✅ ‌EMC-Compatible‌: Non-magnetic, low conductivity for medical/radar systems.

✅ ‌Design Flexibility‌: Custom layup angles, tapered walls, and localized reinforcement.

‌

‌Applications‌

✈️ ‌Aerospace‌: UAV arms, wing spars, satellite trusses, landing gear struts.

???? ‌Industrial‌: Robot linkages, PCB handling shafts, textile rollers.

???? ‌Medical‌: CT scanner rings, surgical robot arms, foldable stretchers.

???? ‌Transportation‌: Train couplers, pantograph rods, cabin handrails.

???? ‌Sports‌: Racing paddles, bike forks, golf club shafts.

‌Quality Assurance

‌

‌Certifications‌: ISO 9001 & AS9100D (aerospace standard)

‌Testing‌: 100% dimensional check + ultrasonic NDT + material batch reports

‌Compliance‌: ASTM D3039, EN 13706, GB/T 3354

‌Customization Workflow‌

‌Requirement Analysis‌ (load conditions, environment, connections)

‌3D Modeling & FEA Simulation‌ (stress/weight optimization)

‌Prototyping‌ (3–7 days, CNC-machined samples)

‌Batch Production‌ → ‌Shipping‌ (anti-static packaging + wooden crates for long tubes)

‌Case Studies‌

???? ‌eVTOL Wing Spar‌: OD 40 mm, WT 2 mm, L 2.2 m, ‌580g weight‌, withstands 8 kN bending load (fatigue >1M cycles).

???? ‌CT Scanner Rotor‌: OD 150 mm, WT 3 mm, ‌roundness ≤0.02 mm‌, zero vibration at 120 RPM.

‌Ordering Information‌

‌MOQ‌: 1 piece (standard sizes ship in 2–3 days; custom lead time 7–15 days).

‌Support‌: Free CAE simulation, adhesive/metal joint design assistance.

‌Contact‌: Send drawings/specs for instant quotes and technical review.

website: https: //www.

cnccarbonfiber.

com/carbon-fiber-tubes/carbon-fiber-round-tubes.

html

Company Contact:

• Posted By: Hengshui Hongwo Technology Co., Ltd.

• Phone: 15132885151

• Address: Fuxing International Park, 161# Ronghua Street, Taocheng District, Hengshui Shi, Hebei , China

• Email:

• Website: https://www.cnccarbonfiber.com/

• Business Description: Founded 17 years ago, our company is a professional import-export enterprise and factory specializing in high-performance industrial materials.
  
  We offer a comprehensive product range—including carbon fiber tubes, sheets, fabrics and custom components; fiberglass pultruded profiles; sealing gaskets, braided packing and sealing sheets; quartz glass; and civil-engineering materials—and employ over 300 people across five branch offices to ensure reliable quality and timely delivery worldwide.