UPN 400 vs UPE 400
- UPN 400 is 1 % lighter than UPE 400 (71.8 vs 72.2 kg/m).
- UPE 400 has 3 % higher strong-axis stiffness Iy.
- UPE 400 has 24 % higher weak-axis stiffness Iz, which governs columns and lateral stability.
- UPE 400 has 2 % higher plastic bending resistance (Wpl,y).
- Per kilogram of steel, both are similarly efficient in bending (Iy/G ≈ 287 cm⁴ per kg/m).
| Property | UPN 400 | UPE 400 |
|---|---|---|
| Height h [mm] | 400 | 400 |
| Flange width b [mm] | 110 | 115 |
| Web thickness tw [mm] | 14.0 | 13.5 |
| Flange thickness tf [mm] | 18.0 | 18.0 |
| Area A [cm²] | 91.5 | 91.9 |
| Mass G [kg/m] | 71.8 | 72.2 |
| Moment of inertia Iy [cm⁴] | 20 350 | 20 980 |
| Elastic modulus Wel,y [cm³] | 1 020 | 1 049 |
| Plastic modulus Wpl,y [cm³] | 1 240 | 1 263 |
| Moment of inertia Iz [cm⁴] | 846 | 1 045 |
| Radius of gyration iy [mm] | 149.0 | 151.1 |
| Radius of gyration iz [mm] | 30.4 | 33.7 |
| Torsion constant It [cm⁴] | 81.6 | 79.1 |
| Warping constant Iw [×10³ cm⁶] | 221.0 | 259.0 |
Highlighted value = the favourable one (higher stiffness/modulus, lower mass). Full property sets on the profile pages.