EN S355JR H-beams muaj cov khoom siv kho tshuab uas zoo sib xws GB Q355B, kom ntseeg tau tias muaj kev sib haum xeeb rau kev hloov cov qauv- nrog rau qhov sib txawv me me hauv kev cuam tshuam toughness uas tswj tau rau feem ntau huab cua:
Mechanical Property Comparison
| Khoom | EN S355JR (EN 10025-2) | GB Q355B (GB/T 1591) | Alignment cuam tshuam |
|---|---|---|---|
| Yield zog (Fy) | 355 MPa (tsawg dua lossis sib npaug li 16 hli), 345 MPa (16-40 mm) | 355 MPa (tsawg dua lossis sib npaug li 16 hli), 345 MPa (16-40 mm) | Zoo tib yam - tib lub peev xwm thauj khoom rau kab teeb Tsawg dua lossis sib npaug li 40 mm tuab (xws li, IPE 200 txhawb nqa 237 MPa bending stress). |
| Tensile zog (Fu) | 470-630 MPa | 470-630 MPa | Zoo tib yam -ob leeg tiv taus 470 MPa yam tsawg kawg nkaus ua ntej tawg, tseem ceeb heev rau kev thauj khoom hnyav (cua, seismic). |
| Elongation (δ) | 21% min (ntau tshaj 50 mm) | 22% min (ntau tshaj 50 mm) | 1% qhov sib txawv yog qhov tsis txaus ntseeg-ob leeg khoov rau 90℃yam tsis muaj kev tawg thiab vuam yam tsis muaj preheating Tsawg dua lossis sib npaug li 25 hli. |
| Impact Toughness | 27 J ntawm +20℃(S355JR), 27 J ntawm 0℃(S355J0), 27 J ntawm -20℃(S355J2) | 34j 0 | S355J0 (0 degree, 27 J) yog tsim rau temperate Tuam Tshoj; S355J2 (-20 degree, 27 J) sib tw Q355D rau cov cheeb tsam txias. |
| Shear zog (Fv) | 235 MPa (tso cai) | 210 MPa (tso cai) | S355JR lub zog shear ntau dua (12% ntau dua) txo qhov kev xav tau ntawm stiffeners hauv kev txhawb nqa nqaj. |
Tiag -Kev Ua Haujlwm Hauv Ntiaj Teb
Ib 10-meter IPE 300 S355JR beam thiab GB HW 300x300 Q355B beam raug sim nyob rau hauv ib tug 30 kN / m uniform load:
Khoov Stress: IPE 300 (30 × 10² × 10⁶/(8 × 575 × 10⁻⁶)=643 MPa) vs. HW 300x300 (30 × 10² × 10⁶/(8 × 1350 × 10⁻⁶)=278 MPa). IPE 300 xav kom txo qis rau IPE 330 (Sx{21}} cm³) rau kev ntxhov siab<355 MPa-demonstrating the need to match section modulus, not just grade.
Deflection: Ob kab teeb deflect ~ 15 hli (zoo hauv qab GB 50017-2017's 1/250 ncua txwv ntawm 40 hli).
Qhov kev sib raug zoo no tau lees paub S355JR H- kab teeb ua haujlwm zoo ib yam rau Q355B thaum ntu kev hloov pauv tau sib tw, nrog kev hloov kho yooj yim rau huab cua txias.