{"id":4563,"date":"2026-06-01T13:51:49","date_gmt":"2026-06-01T05:51:49","guid":{"rendered":"https:\/\/ytcarbonfiber.com\/?post_type=product&p=4563"},"modified":"2026-06-08T21:09:19","modified_gmt":"2026-06-08T13:09:19","slug":"carbon-fiber-rectangular-tube","status":"publish","type":"product","link":"https:\/\/ytcarbonfiber.com\/de\/produkt\/carbon-fiber-rectangular-tube\/","title":{"rendered":"Carbon Fiber Rectangular Tube"},"content":{"rendered":"

Product Details<\/h2>\n

When your design loads come from one dominant direction, a carbon fiber rectangular tube is the most weight-efficient profile you can pick. The taller cross-section places more fiber farther from the neutral axis, and bending stiffness scales with the cube of that distance \u2014 so a 20mm \u00d7 40mm rectangular tube at the same wall thickness delivers roughly 3\u00d7 the bending stiffness in the tall direction compared to a 20mm \u00d7 20mm square tube, while weighing almost the same. That’s the math that makes rectangular profiles the go-to choice for beams, rails, and spanning members where you know which way the load points.<\/p>\n

Unlike a square tube which splits its moment of inertia equally between two axes, the rectangular profile concentrates stiffness where you need it and accepts lower performance on the other axis. If your beam only bends one way \u2014 a gantry rail carrying a moving head, a wing spar under lift, a shelf bracket under gravity \u2014 that’s not a compromise, that’s an optimization. For applications requiring equal stiffness in both axes, see our carbon fiber square tube<\/a><\/strong>. For torsion-dominated loads, a round tube<\/a><\/strong> handles twist more efficiently.<\/p>\n

We produce these rectangular carbon fiber tubes in our Shenzhen facility with both roll-wrapped and pultruded construction. Pultruded tubes are available in single-piece lengths up to 8 meters \u2014 one of the longest capabilities among Chinese carbon fiber tube manufacturers. The asymmetric cross-section requires careful fiber placement: we orient the primary load-bearing plies along the 0\u00b0 axis of the tall wall and add \u00b145\u00b0 shear plies at the top and bottom flanges. Every tube ships with dimensional inspection data covering width, height, wall thickness, and bow deviation along the length.<\/p>\n

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Specifications<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Specification<\/th>\nDetails<\/th>\n<\/tr>\n<\/thead>\n
Material<\/strong><\/td>\nT300\/T700\/T800 carbon fiber<\/td>\n<\/tr>\n
Cross-Section<\/strong><\/td>\nRectangular (flat profile)<\/td>\n<\/tr>\n
Width (OD)<\/strong><\/td>\n5mm \u2013 150mm<\/td>\n<\/tr>\n
Height (OD)<\/strong><\/td>\n8mm \u2013 200mm<\/td>\n<\/tr>\n
Wall Thickness<\/strong><\/td>\n0.5mm \u2013 8mm<\/td>\n<\/tr>\n
Corner Radius<\/strong><\/td>\n1\u20133mm (wall thickness dependent)<\/td>\n<\/tr>\n
Max Single-Piece Length<\/strong><\/td>\n8000mm (8 meters)<\/td>\n<\/tr>\n
Construction<\/strong><\/td>\nRoll-wrapped \/ Pultruded<\/td>\n<\/tr>\n
Weave Options<\/strong><\/td>\n3K Twill \/ Plain \/ UD<\/td>\n<\/tr>\n
Surface Finish<\/strong><\/td>\nMatte \/ Glossy<\/td>\n<\/tr>\n
Fiber Volume Fraction<\/strong><\/td>\n60\u201365%<\/td>\n<\/tr>\n
Density<\/strong><\/td>\n1.55\u20131.60 g\/cm\u00b3<\/td>\n<\/tr>\n
Flexural Modulus (strong axis)<\/strong><\/td>\n\u2265 130 GPa (0\u00b0 layup)<\/td>\n<\/tr>\n
Deflection (1m span, 10kg center)<\/strong><\/td>\n< 1.5mm (40\u00d720\u00d72mm tube)<\/td>\n<\/tr>\n
Bow Deviation<\/strong><\/td>\n\u2264 1mm per meter<\/td>\n<\/tr>\n
Operating Temperature<\/strong><\/td>\n-40\u00b0C to 120\u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Applications<\/h2>\n
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