IPE 400 vs IPN 400
- IPE 400 is 28 % lighter than IPN 400 (66.3 vs 92.4 kg/m).
- IPN 400 has 26 % higher strong-axis stiffness Iy.
- IPE 400 has 14 % higher weak-axis stiffness Iz, which governs columns and lateral stability.
- IPN 400 has 31 % higher plastic bending resistance (Wpl,y).
- Per kilogram of steel, IPE 400 is the more efficient bending section (Iy/G: 349 vs 316 cm⁴ per kg/m).
| Property | IPE 400 | IPN 400 |
|---|---|---|
| Height h [mm] | 400 | 400 |
| Flange width b [mm] | 180 | 155 |
| Web thickness tw [mm] | 8.6 | 14.4 |
| Flange thickness tf [mm] | 13.5 | 21.6 |
| Area A [cm²] | 84.5 | 117.7 |
| Mass G [kg/m] | 66.3 | 92.4 |
| Moment of inertia Iy [cm⁴] | 23 130 | 29 210 |
| Elastic modulus Wel,y [cm³] | 1 156 | 1 460 |
| Plastic modulus Wpl,y [cm³] | 1 307 | 1 714 |
| Moment of inertia Iz [cm⁴] | 1 318 | 1 160 |
| Radius of gyration iy [mm] | 165.5 | 157.0 |
| Radius of gyration iz [mm] | 39.5 | 31.2 |
| Torsion constant It [cm⁴] | 50.4 | 170.0 |
| Warping constant Iw [×10³ cm⁶] | 482.9 | 420.0 |
Highlighted value = the favourable one (higher stiffness/modulus, lower mass). Full property sets on the profile pages.