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Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength
Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength
Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength
Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength
Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength
Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength
Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength
Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength
Specifications
MOQ :
Negotiable
Delivery Time :
7 working days after receiving Order Pay
C Content (%) :
100%
Highlights :
±0.1 mm tolerance
Model Number :
OEM
Working Temperature :
260-500℃
Payment Terms :
T/T, Western Union, L/C
Wall Thickness :
0.3 - 50 mm
Surface :
Crude, Smooth, Polished, High glossy/matt
Supply Ability :
1500pcs month
Product Name :
Square Carbon Fiber Tubes
Packaging Details :
Normal Corrugated Carton Packing for International Shipment
Price :
Negotiable
Length Range :
5 - 6000 mm
Brand Name :
Tanku
Application :
Aerospace, Automotive,Sports
Certification :
SGS, ROHS
Place of Origin :
China
Description

Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength

The ‌square carbon fiber tube‌ is a hollow structural profile with a square/rectangular cross-section, fabricated by pultrusion or compression molding. It employs continuous ‌carbon fiber (T300/T700 grade)‌ as reinforcement and ‌epoxy resin‌ as the matrix. Compared to round tubes, it offers 40% higher torsional rigidity, planar mounting stability, and sub-millimeter dimensional accuracy – making it ideal for modular systems like robotic arms, drone frames, and optical platforms.

Our high-strength square carbon fiber tubing is fabricated with unidirectional (UD) carbon fiber prepreg. Unlike metal tubing, carbon fiber tubing is designed with layers of fibers oriented at different angles to provide properties designed for a specific application. A variety of types or grades of carbon fiber tubing are available, as well as various exterior materials.

  • Square Carbon Fiber Tubes deliver ultra‑lightweight rigidity and precise custom sizing for high‑performance applications.
  • Highlights: ±0.1 mm tolerance, UV‑resistant finish, corrosion‑proof surface.
  • Advantages: 50 % lighter than aluminum, 4× higher stiffness, maintenance‑free.
  • Ideal for structural frames, robotic arms, and camera supports—boosting strength and efficiency.

Materials & Manufacturing‌

‌Fiber Systems‌

  • ‌Standard‌: T300 12K unidirectional + 3K twill outer layer (visible carbon weave)
  • ‌High-Strength: T700 12K full unidirectional, 18% higher modulus
  • ‌High-Modulus: M40J 6K hybrid layup for precision optical beams

‌Resin Systems‌

  • Standard epoxy: Operating temp. ‌-40℃ to 120℃‌
  • High-temp epoxy: ‌T<sub>g</sub> 180℃‌, short-term resistance to 200℃
  • Flame-retardant epoxy: ‌UL94-V0‌ for UAV battery trays/rail transit

‌Processes‌

  • ‌High-temp pultrusion: Seamless 3–6m lengths, straightness ≤0.2mm/m
  • ‌Vacuum compression molding: Dimensional tolerance ±0.05mm
  • ‌Secondary CNC machining: Milling slots, drilling, threading, aluminum inserts

‌Surface Finishes‌

  • 3K twill + matte/gloss UV coating
  • Matte black PU paint (non-reflective for optics)
  • Anodized inner walls for adhesive bonding
TECHNICAL DATASHEET
Manufacturing Method :
Rectangular Carbon Fiber Tube - By Roll Wrapping Process
Custom Shape Carbon Fiber Tube - By Compression Moulding Process
Structure
UW
U= Undirectional Prepreg
W= Woven Prepreg
Raw Materials :
Carbon Fiber , Epoxy
Diameter Range O.D.
From 6mm O.D. to 300 mm
Wall Thickness
From 0.5mm to 20mm
Length :
From 0.05 Meter to 3.5 Meters
Colors :
Black Or Any Color from RAL ;
Surface Treament :
Matt Finish & Glossy
Water Absorption
< 1,5 w-%
Denisty
1.5g/cm3
FIBER TYPE
HS Carbon
HM Carbon
Stifiness
90- 100 Gpa
120-180
Bending Strength
>600 Mpa
>500 Mpa
Tensile Strength
> 650 Mpa
>550 Mpa
Denisity
> 1.5g/cm3
>1.5g/cm3

Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑StrengthUltra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑StrengthUltra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑StrengthUltra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength

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Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength

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Product Detail
MOQ :
Negotiable
Delivery Time :
7 working days after receiving Order Pay
C Content (%) :
100%
Highlights :
±0.1 mm tolerance
Model Number :
OEM
Working Temperature :
260-500℃
Contact Supplier
Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength
Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength
Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength
Ultra‑Lightweight Rigidity 3K Square Carbon Fiber Tubes | Custom Sizes & High‑Strength

SHANGHAI LIJIN IMP.&EXP. CO.,LTD

Verified Supplier
12 Years
shanghai, shanghai
Since 2008
Business Type :
Manufacturer, Exporter, Trading Company
Main Products :
Carbon Fiber Tube, Carbon Fiber Plate, Carbon Fiber Telescopic Pole
Total Annual :
1000000-2000000
Certification Level :
Verified Supplier
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