1. Cov yam ntxwv tseem ceeb ntawm S355J2WP
Khoom Siv Khoom
| Ntiag tug | Tus nqi(Metric) | Tus nqi(Imperial) |
|---|---|---|
| Paib lub zog (rov qab) | Ntau dua los yog sib npaug rau 355 mpa | Ntau dua los yog sib npaug rau 51.5 ksi |
| Lub zog tensile (RM) | 470-630 MPa | 68-91 Ksi |
| Elongation (A₅) | Ntau dua los yog sib npaug rau 20%(hauv 5.65√ssis) | Ntau dua los yog sib npaug rau 20% |
| Kev Cuam Tshuam Tougness (KV) | Ntau dua los yog sib luag rau 27 j ntawm -20℃(-4℃f) | Ntau dua los yog sib npaug rau 20 ft-lb ntawm -4℃f |
Kev siv tshuaj lom neeg (ib txwm muaj, thiab 10025-5)
| Lub ntsiab | Muaj pes tsawg leeg (%) | Lub luag hauj lwm |
|---|---|---|
| C | Tsawg dua los yog sib npaug rau 0.12 | Kev tswj hwm lub zog & Weldability |
| Si | 0.25–0.75 | Txhim kho oxidation tsis kam |
| Mn | 0.50–1.50 | Txhim Kho Cov Hardenability |
| P | 0.06–0.15 | Nraum tiv thaiv Patina |
| S | Tsawg dua los yog sib npaug rau 0.030 | Minimizes brittleness |
| CU | 0.25–0.55 | Yuam sij rau corrosion tsis kam |
| Cr | 0.40–1.25 | Huab Cua Kuj |
2. Corrosion Kuj & Huab Cua Kev Siv Hluav Taws Xob
Ua cov txheej xeb (patina)Thaum raug huab cua, zoo ib yam liCorten steel.
Zoo tshaj plaws rau:
Urban / Cov Tshuaj Nyob deb nroog (Cov Tshuaj Tsawg / Sulphur).
Txuas hniav, facades, ntim, thiab duab puab sab nraum zoov.
Tsis pom zoo rau:
Nqaum|Tubrog ib puag ncig (cov chloride → pitting).
Faus / cov ntawv thov raus (xav tau cov txheej txheej).
3. Piv rau lwm tus Woods Cov Hlau
| Teem nqi | Lub hom phiaj | Paib lub zog | Qhov tseem ceeb sib txawv |
|---|---|---|---|
| S355j2wp | EN 10025-5 | Ntau dua los yog sib npaug rau 355 mpa | European sib npaug rau Corten B, optimized rau vuam |
| Corten a | ASTM A242 | Ntau dua los yog sib npaug rau 345 mpa | Cov ntsiab lus P Ntsiab Lus Ntau (sai sai patina) |
| Corten B | ASTM A588 | Ntau dua los yog sib npaug rau 345 mpa | Zoo dua Taus Rau Cov Kwv Txhiaj |
4. Kev thov ntawm S355J2Wp kub dov phaj
Cov qauv kws kos duab(xeb facades).
Txuas hniav & Kev Loj Gantries(Tsis muaj daim duab xav tau).
Railway Wagons & Cov Thawv Thauj Khoom.
Kev Mob yees & Sab Nraud Kos Duab.
5. Fabrication & Vuam Cov Lus Qhia
Machining & Txiav
Ntshav / laser txiav: Nyiam rau cov npoo huv.
Oxyfuel Txiav: Tau tab sis yuav xav tau kev sib tsoo tom qab txiav ntoo.
Lus pom zoo vuam
Preheat: 100-150 degree (212–302°F) for thick plates (>20mm).
Cov Hluav Taws Xob: SivTsawg-Hydrogen Rods(piv txwv li, aws E7018-W2).
Tom qab Weld: Tso cai rau kev tsim Patina; Zam xim tshwj tsis yog.
6. Muaj ntau rau thiab muab khoom
Qhov tuab: Feem ntau3mm-100mm(kub dov).
Qhov dav: Mus txog3,000 hli.
Nplaim: Zeb teev (xeb-nquag) lossis tua-blasted (rau txheej txheej).
