High Modulus Round Carbon Fiber Tube — M40
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High Modulus Round Carbon Fiber Tube — M40

High modulus round tube manufactured with M40 grade fiber (tensile modulus 400 GPa). Designed for applications where maximum stiffness-to-weight ratio is critical, such as optical systems, precision machinery, and aerospace structures.

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Key Features

M40 grade — tensile modulus 400 GPa
Ultra-high stiffness-to-weight ratio
Low thermal expansion
Premium surface finish
Ideal for precision applications

Applications

Optical mountsRobotic armsPrecision machinerySatellite structuresMeasurement equipment

Specifications

Fiber Grade
M40 (Toray)
Tensile Modulus
400 GPa
Tensile Strength
4400 MPa
Density
1.77 g/cm³
OD Range
10 – 80 mm
Wall Thickness
1 – 4 mm
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Frequently Asked Questions

What is the minimum order quantity for carbon fiber products?
We accept small-batch customization. Minimum quantities vary by product type — tubes and plates have lower MOQs, while custom-shaped parts depend on tooling requirements. Contact our sales team for a detailed quote.
What color and finish options are available?
Standard finishes include 3K plain/twill weave, UD unidirectional, and satin, primarily in black. Custom colors and surface coatings — including matte and gloss clear coats — are also available.
What is the typical lead time?
Standard product lead time is 15–25 working days. Custom products are evaluated based on process complexity. Rush service is available — please confirm timelines when requesting a quote.

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