The EN IPE 200 (parallel-flange H-beam) and GB HN 200x100 (narrow-flange H-beam, GB/T 11263) are near-equivalent for medium-load applications, with minor dimensional variances that require minimal adjustments for substitution:
Dimensional Breakdown (Metric)
| Dimension | EN IPE 200 (S355JR) | GB HN 200x100 (Q355B) | Variance | Practical Impact |
|---|---|---|---|---|
| Depth (d) | 200 mm | 200 mm | 0 mm | Identical-no fit issues with vertical brackets. |
| Flange Width (bf) | 100 mm | 100 mm | 0 mm | Same flange width-bolts align with GB holes (e.g., M16 bolts fit both). |
| Web Thickness (tw) | 5.6 mm | 7.0 mm | -1.4 mm | IPE's thinner web reduces shear capacity by ~18% (110 kN vs. 134 kN). Add web stiffeners (100x6 mm plates) for high-shear uses. |
| Flange Thickness (tf) | 8.5 mm | 11.4 mm | -2.9 mm | IPE's thinner flange reduces bending capacity by ~10% (236 cm³ vs. 262 cm³). Use IPE 220 (291 cm³) for equivalent capacity. |
| Weight (w) | 27.4 kg/m | 31.9 kg/m | -4.5 kg/m | IPE is lighter-reduces transportation and support costs. |
| Section Modulus (Sx) | 236 cm³ | 262 cm³ | -26 cm³ | Compensate with a larger IPE size (e.g., IPE 220) for heavy bending loads. |
Substitution Steps
Load Capacity Check: For a 6-meter span supporting 25 kN/m, IPE 200's bending stress (25×6²×10⁶/(8×236×10⁻⁶) = 237 MPa) is below S355JR's yield strength (355 MPa), so no upgrade is needed for light loads. For 35 kN/m, switch to IPE 220 (Sx=291 cm³) to keep stress at 290 MPa.
Bracket Adjustment: IPE's thinner web requires shorter bolts (M16×30 vs. M16×35 for GB) to ensure proper thread engagement.
Welding: Use 6 mm fillet welds (vs. 8 mm for GB) to match IPE's flange thickness-no changes to current/voltage settings (220 A, 28 V for GMAW).
This alignment makes IPE 200 a cost-effective substitute for HN 200x100, with targeted adjustments for heavy loads.