Pipe18XS Steel Pipe — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Outer Diameter (OD) | 18 | 457.2 mm |
| Wall Thickness (t) | 0.5 | 12.7 mm |
| Area (A) | 24.8 in² | 160.0 cm² |
| Weight | 93.5 lb/ft | 139.1 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 956 | 956 | in⁴ |
| Elastic Section Modulus (S) | 106 | 106 | in³ |
| Plastic Section Modulus (Z) | 139 | 139 | in³ |
| Radius of Gyration (r) | 6.21 | 6.21 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 1910 | in⁴ |
| Warping Constant (Cw) | 0 | in⁶ |
Design Resources
- Section Properties Database — Compare with other sections
- Steel Pipe Reference — Full pipe dimension table
- Steel Grades Reference — Material properties
Frequently Asked Questions
What is the weight of a Pipe18XS pipe section? 93.5 lb/ft (139.1 kg/m).
What is the section modulus of Pipe18XS? Sx = 106 in³, Zx = 139 in³ (strong axis). Sy = 106 in³, Zy = 139 in³ (weak axis).
What steel grade is standard for Pipe18XS? ASTM A53 Grade B (Fy = 35 ksi) for pipe sections. Verify with mill certificate.
What is the moment of inertia of Pipe18XS? Ix = 956 in⁴ about the strong axis and Iy = 956 in⁴ about the weak axis. The radius of gyration is rx = 6.21 in and ry = 6.21 in.
Related Pages
Educational reference only. Verify all section properties against the current AISC Manual and mill certificates before design. Results are PRELIMINARY — NOT FOR CONSTRUCTION.