Tube - Square - Ultra High Modulus - 0.75 X 0.825 X 66 Inch - BLOWOUT
Estimated lead time for quantities greater than what is Available Now is expected to be at least 4 weeks.
If there is an Available Now quantity listed above, it indicates our quantity in stock. Orders placed today for this quantity or less are expected to ship the next business day.
Unlike metals which have similar properties in all directions (isotropic), the properties of composites are varying, dependent on the orientation of the fibers in each layer.
Roll wrapped tubing is manufactured using multiple layers of pre-preg carbon fiber (and if noted, other) materials. In general each layer is about 0.006 inches thick which means that a tube with a wall thickness of 0.060 inches will typically be composed of 9-10 individual layers of carbon fiber. The number of layers(plys) allows us to vary the orientation of the fibers throughout the thickness, creating a high performance, engineered product.
- Fabric Tubing has an outer ply of woven material (denoted below as 0°/90°). Typically this outer ply is a 2x2 twill weave (diagonal appearance seen below) but it can also be a plain weave (small checkerboard), spread tow (large format plain weave / checkerboard) or other off-axis weave such as a braid. The core of these tubes are almost always comprised of multi-directional "uni" plies.
- Uni Tubing is comprised of multi-directional "uni" plies just like the fabric tubes however instead of the outer ply being fabric, it is unidirectional and most typically oriented at 0° (fibers running the length).
- To learn about our Roll Wrapping Process click here.
*This diagram illustrates a "generic" layup. The SKU being viewed may not have the layup schedule shown in this diagram. To view this SKU's particular layup please check out the "LAYUP ORIENTATION" tab.
Additional Information
| Application | Space & Stable Structures |
|---|---|
| Shape | Square |
| Materials | Ultra High Modulus Carbon |
| Pattern | Unidirectional |
| Color | Black |
| Finish | Cello Wrap Gloss |
| Inside Diameter | 0.75 |
| Outside Diameter | 0.825 |
| Wall Thickness | 0.038 |
| Major ID | 0.75 |
| Major OD | 0.75 |
| Minor ID | 0.75 |
| Minor OD | 0.75 |
| Inner Corner Radius (approximate) | 0.15625 |
| Outer Corner Radius (approximate) | 0.1875 |
| Length | 66 |
| Length (max continuous) | 66.0 |
| Linear Density | 0.085 |
| Volumetric Density | 0.06 |
| Weight | 0.468 |
| Primary Fiber | Pyrofil K13916 |
| Primary Resin / Hardener | Newport 301 |
| HTS - Harmonized Tariff Code | 6815.13.0000 |
| ECCN | EAR99 |
| REACH | SCHV JUN-2022 |
| RoHS | 2015/863/EU |
| USMCA Criterion | D |
Engineering Properties
All laminate properties and mechanical calculations are based on Classical Lamination Theory and should be used as a reference only. Rock West Composites does not guarantee these properties or calculations.
| Avg EX Young's Modulus | 3.696E7 |
|---|---|
| Avg EY Young's Modulus | 2708000.0 |
| GXY Shear Modulus | 2508000.0 |
| X Tensile Yield Strength | 139800.0 |
| X Compressive Yield Strength | 42880.0 |
| Y Tensile Yield Strength | 14720.0 |
| Y Compressive Yield Strength | 16410.0 |
| XY Shear Strength | 15960.0 |
| CTEX | -6.37E-07 |
| CTEY | 5.98E-06 |
| Poisson's Ratio vXY | 0.541 |
| Poisson's Ratio vYX | 0.04 |
Note:
- "X" is along the length of a tube, rod, plate, or panel.
- "Y" is around the perimeter of a tube, perpendicular to the length of pultruded parts, or along the width of a plate or panel.
Layup Orientation
25483-UHM-BLOWOUT Rev A
| Ply # | Orientation (degrees) | Location |
|---|---|---|
| 1 | 0 | Inside |
| 2 | 45 | ↓ |
| 3 | -45 | |
| 4 | 0 | Outside |
- 0° fibers maximize bending stiffness and run along the length of the part. Consider bending a tube over your knee.
- 45° fibers maximize torsional stiffness and are typically plied together in an opposing manner, i.e. ±45°. Consider twisting a tube like a vehicle's driveshaft.
- 90° (or "hoop") fibers maximize crushing stiffness and generally assist in overall durability. Consider laying a tube on the ground and stepping on it.
Technical Specifications
Radius of Tubing
The inner and external corner radii are measured by hand with a radius gauge with no tolerance called out.
- Internal Radius: 5/32”
- External Radius: 3/16”
Estimated Laminate Stiffness Properties (psi)
| EX | EY | GXY | EXB | EYB |
| 3.696E+07 | 2.708E+06 |
2.508E+06 |
5.198E+07 |
9.598E+05 |
Estimated Laminate CTE Properties (ppm/°F)
| CTE-X | CTE-Y | CTE-XY |
| -6.37E-07 |
5.98E-06 |
7.34E-22 |
Estimated Laminate Strength Properties (psi)
| X-Axis Tension |
X-Axis Compression |
Y-Axis Tension |
Y-Axis Compression |
XY-Shear |
| 1.398E+05 |
-4.288E+04 |
1.472E+04 |
-1.664E+04 |
1.607E+04 |