IPE 80 vs IPN 80
- IPN 80 is 2 % lighter than IPE 80 (5.9 vs 6.0 kg/m).
- IPE 80 has 3 % higher strong-axis stiffness Iy.
- IPE 80 has 35 % higher weak-axis stiffness Iz, which governs columns and lateral stability.
- IPE 80 has 2 % higher plastic bending resistance (Wpl,y).
- Per kilogram of steel, both are similarly efficient in bending (Iy/G ≈ 13 cm⁴ per kg/m).
| Property | IPE 80 | IPN 80 |
|---|---|---|
| Height h [mm] | 80 | 80 |
| Flange width b [mm] | 46 | 42 |
| Web thickness tw [mm] | 3.8 | 3.9 |
| Flange thickness tf [mm] | 5.2 | 5.9 |
| Area A [cm²] | 7.6 | 7.6 |
| Mass G [kg/m] | 6.0 | 5.9 |
| Moment of inertia Iy [cm⁴] | 80 | 78 |
| Elastic modulus Wel,y [cm³] | 20 | 20 |
| Plastic modulus Wpl,y [cm³] | 23 | 23 |
| Moment of inertia Iz [cm⁴] | 8 | 6 |
| Radius of gyration iy [mm] | 32.4 | 32.0 |
| Radius of gyration iz [mm] | 10.5 | 9.1 |
| Torsion constant It [cm⁴] | 0.7 | 0.9 |
| Warping constant Iw [×10³ cm⁶] | 0.1 | 0.1 |
Highlighted value = the favourable one (higher stiffness/modulus, lower mass). Full property sets on the profile pages.