Square carbon tubes are square on the outside with a round hole in the middle. These tubes are pultruded and have longitudinally-oriented fibers. Square carbon tubes are a great choice if you have an application that requires a square profile but the stiffness and lightness of a carbon fiber tube. Our customers often use these rods as stiffeners in foam surfboards and foam RC models. Contact us for custom cutting or large orders at [email protected] or 206-632-6151 to speak to composites engineer.
Click on the product number to view product details, product pictures, related products, and more! All lengths listed are +/- 0.062″ and all diameters listed are within +/- 0.005″.
MetricSAE
Fraction to Decimal Conversions: 
| Minimum Properties | |
|---|---|
| Tensile Strength | 240 ksi / 1.65 GPa |
| Tensile Modulus | 19.5 msi / 134 GPa |
| Ultimate Shear Strength | 6.0 ksi / 41.3 Mpa |
| Ultimate Tensile Strain | 1.40% |
| Flexural Strength | 200 ksi / 1.37 GPa |
| Flexural Modulus | 18.5 msi / 127 GPa |
| Fiber Volume | 60% |
| Thermal Expansion Coefficient | -0.1 ppm/cm3 / -0.2 ppm/°C |
| Density | .054 lbs/in3 / 1.5 g/cm3 |
| Diameter Tolerance | +.005/-.005″ |
| Glass Transition Temperature | 100° C |
| Matrix Material | Bisphenol Epoxy Vinyl Ester |