Cov Khoom Siv Neeg Kho Tshuab
| Ntiag tug | S275 | S355 | Yam uas pab |
|---|---|---|---|
| Paib lub zog (rov qab) | Ntau dua los yog sib npaug rau 275 mpa | Ntau dua los yog sib npaug rau 355 mpa | S355 yog ~ 29% muaj zog |
| Lub zog tensile (RM) | 410-560 MPa | 470-630 MPa | Ntau Lub Peev Tsheb |
| Elongation (A₅) | Ntau dua los yog sib npaug rau 22% (tuab-nyob) | Ntau dua los yog sib npaug rau 22% (zoo sib xws) | Sib piv Ductility |
| Kev Cuam Tshuam(Charpy V-NotC) | Sib txawv los ntawm subgrade (JR / J0 / J2) | SUBGRADES ZOO LI (JR / J0 / J2 / K2) | S355K2 muaj cov khoom siv tawv qis dua |
Tshuaj Muaj Tshuaj
| Caij (max%) | S275jr | S355jr | Qhov tseem ceeb sib txawv |
|---|---|---|---|
| Carbon (c) | 0.21 | 0.22 | S355 tej zaum yuav muaj cov pa roj carbon ntau dua rau lub zog |
| Manganese (mn) | 1.50 | 1.60 | Ntau Tshaj MN hauv S355 txhim kho cov hardenerability |
| Phosphorus (p) | 0.035 | 0.035 | Zoo sib xws (cuam tshuam brittleness) |
| Sulphur (s) | 0.035 | 0.035 | Zoo sib xws (muaj kev cuam tshuam rau lub tshuab xaws) |
| CEV (Carbon sib npaug) | ~0.35 | ~0.40 | S275 yog yooj yim me ntsis rau weld |
Nqi & Cov Txuag Zog
Cov Khoom Siv Nqi: S355 nqi feem ntau15-20% ntau duatshaj S275.
Qhov hnyav Txuag: Siv S355 tuaj yeem txo cov qauv hnyav los ntawm~20%rau tib lub peev xwm thauj khoom.
Fabrication nqi: S355 yuav xav kom cov txheej txheem vuam (siab dua).
Cov Ntawv Thov
| Xwm txheej | Cov qib xav tau tshaj plaws | Qho tseem ceeb |
|---|---|---|
| Lub teeb qauv(piv txwv li, platforms, tsis yog-tseem ceeb) | S275 | Tus nqi qis dua, muaj zog txaus |
| Kev Tsim Kho Hnyav(piv txwv li, txuas hniav, high-nce) | S355 | Ntau lub zog-rau-qhov hnyav piv txwv |
| Tsawg-qhov chaw kub(piv txwv li, tawm tsam, cov cheeb tsam txias) | S355J2 / K2 lossis S275J2 | Zoo dua Toughness ntawm -20℃rau -50 degree |
| Welded cov rooj sib txoos(xws li, machinery) | S275 (Yog tias tsawg dua cev yog qhov tseem ceeb) | Yooj yim welding nrog preheat |
Cov Ntsiab Lus Tseem Ceeb
Xaiv S275 yog tias:
Nyiaj txiag nruj.
Loads yog ib nrab (piv txwv li, lub vaj tsev vaj tse, txhawb nqa).
Vuam sim yooj yim yog qhov tseem ceeb.
Xaiv S355 yog tias:
Siab zog-rau-qhov hnyav piv yog xav tau (piv txwv li, txuas hniav, cranes).
Txo cov khoom siv hnyav txuag tau cov nqi tag nrho.
Tsawg-kub kev tawv yog qhov tseem ceeb (J2 / K2 qib).
Tag
S355 yogCov tswv yim zoo dua qubrau cov ntawv thov kev ntxhov siab ntau, tab sis S275 yog ntau duaNqi-Zoorau cov khoom siv sib zog. Ib txwm sab lajTsim tsim cov cim(piv txwv li, Eurocode 3) thiab ua ibTus Nqi Them Nyiajua ntej xaiv.
Rau cov phiaj xwm tseem ceeb, xav txogS355J2/K2rau kev txhim kho tawv tawv lossisS275jrrau cov txheej txheem theem pib xav tau.
