HEA 650 vs HEB 650
- HEA 650 is 16 % lighter than HEB 650 (189.7 vs 224.8 kg/m).
- HEB 650 has 20 % higher strong-axis stiffness Iy.
- HEB 650 has 19 % higher weak-axis stiffness Iz, which governs columns and lateral stability.
- HEB 650 has 19 % higher plastic bending resistance (Wpl,y).
- Per kilogram of steel, both are similarly efficient in bending (Iy/G ≈ 930 cm⁴ per kg/m).
| Property | HEA 650 | HEB 650 |
|---|---|---|
| Height h [mm] | 640 | 650 |
| Flange width b [mm] | 300 | 300 |
| Web thickness tw [mm] | 13.5 | 16.0 |
| Flange thickness tf [mm] | 26.0 | 31.0 |
| Area A [cm²] | 241.6 | 286.3 |
| Mass G [kg/m] | 189.7 | 224.8 |
| Moment of inertia Iy [cm⁴] | 175 200 | 210 600 |
| Elastic modulus Wel,y [cm³] | 5 474 | 6 480 |
| Plastic modulus Wpl,y [cm³] | 6 136 | 7 320 |
| Moment of inertia Iz [cm⁴] | 11 720 | 13 980 |
| Radius of gyration iy [mm] | 269.3 | 271.2 |
| Radius of gyration iz [mm] | 69.7 | 69.9 |
| Torsion constant It [cm⁴] | 458.6 | 752.0 |
| Warping constant Iw [×10³ cm⁶] | 10 915.0 | 13 219.0 |
Highlighted value = the favourable one (higher stiffness/modulus, lower mass). Full property sets on the profile pages.