HSS18.000X0.250 Steel Round HSS — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Outer Diameter (OD) | 18 | 457.2 mm |
| Wall Thickness (t) | 0.25 | 6.3 mm |
| Area (A) | 13 in² | 83.9 cm² |
| Weight | 47.44 lb/ft | 70.6 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 512 | 512 | in⁴ |
| Elastic Section Modulus (S) | 56.9 | 56.9 | in³ |
| Plastic Section Modulus (Z) | 73.4 | 73.4 | in³ |
| Radius of Gyration (r) | 6.28 | 6.28 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 1020 | in⁴ |
| Warping Constant (Cw) | 0 | in⁶ |
Design Resources
- Section Properties Database — Compare with other sections
- Steel Grades Reference — Material properties
Frequently Asked Questions
What is the weight of a HSS18.000X0.250 section? 47.44 lb/ft (70.6 kg/m).
What is the section modulus of HSS18.000X0.250? Sx = 56.9 in³, Zx = 73.4 in³ (strong axis). Sy = 56.9 in³, Zy = 73.4 in³ (weak axis).
What steel grade is standard for HSS18.000X0.250? ASTM A500 Grade C (Fy = 46 ksi) or Grade B (Fy = 42 ksi). Verify with mill certificate.
What is the moment of inertia of HSS18.000X0.250? Ix = 512 in⁴ about the strong axis and Iy = 512 in⁴ about the weak axis. The radius of gyration is rx = 6.28 in and ry = 6.28 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.