

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.
Key Features
Applications
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
Usually respond within 24 hours
Frequently Asked Questions
What is the minimum order quantity for carbon fiber products?
What color and finish options are available?
What is the typical lead time?
Related Articles

Carbon Fiber Toe Plates: Rocker Design in Footwear
A carbon fiber plate toe is more than a stiff insert placed under the forefoot. In modern performance and medical footwear, toe plate geometry works together with rocker design to guide how the foot rolls from midstance to push-off. When the plate is shaped, positioned, and tuned correctly, it can r

Best Carbon Fiber Rod: Application-Based Picks
If you are searching for the best carbon fiber rod, the right answer depends on the job. A rod that works well in a lightweight drone frame may be a poor choice for a repair brace, a robotics linkage, or a precision alignment tool. To choose the best carbon fiber rod, start with the load case: tensi

The Crust Carbon Fiber: What the Term Means in Searches
When people search the crust carbon fiber, the query is rarely a clean technical phrase. It can point at the outer surface layer of a composite laminate, at a named product or brand, or at a shorthand description of tough outer layers in armor and framing. Because the term is short and open ended, s

Best Carbon Fiber Plate Basketball Shoes: Court Performance Tradeoffs
The best carbon fiber plate basketball shoes are not the stiffest plated shoes on the rack, because basketball loads a plate sideways during cuts and landings in ways that forward-running racers never face. A full-length racing outline that feels snappy on a straight line can feel like a plank under

Carbon Fiber Plate Shoes: What the Insert Changes
Carbon fiber plate shoes are trainers whose midsole hides a thin composite leaf spring, and the category grew from a racing curiosity into the default build for competitive road running in under a decade. The plate itself is a laminate — usually unidirectional plies stacked to roughly 0.8 to 1.3 mil

Carbon Fiber Plate in Hoka Running Shoes: Super-Shoe Technology Explained
The carbon fiber plate in Hoka running shoes has become one of the most discussed innovations in modern footwear design. What began as a niche technology in elite racing shoes has now become a standard feature across Hoka's performance lineup, from the Carbon X to the Rocket X2. The carbon fiber pla