Cov Nta Tseem Ceeb Ntawm Astm A242
1. Tshuaj lom neeg sib xyaw (%)
| Lub ntsiab | C (max) | Mn | P | S (max) | CU (min) | Si | Cr |
|---|---|---|---|---|---|---|---|
| Qho deb | 0.15 | 0.50-1.25 | 0.07-0.15 | 0.05 | 0.20 | 0.25-0.75 | 0.40-0.70 |
Phosphorus (p) & tooj (CU)Txhim kho xeb teeb kev tsim.
Cov pa roj carbon tsawg (c)txhim kho wardability.
2. Cov Khoom Siv Neeg Kho Tshuab
| Tuab (mm) | Yield zog (MPA, min) | Tensile lub zog (mpa) | Elongation (% min) |
|---|---|---|---|
| Tsawg dua los yog sib npaug rau 20 hli | 345 | 480 | 18 |
| >20-40 mm | 315 | 460 | 18 |
Lub zog siab dua cov qauv hlau(zoo ib yam li S355J0wP).
Zoo ductility(18% min elongation).
3. Corrosion Kuj
2-8 × zoo dua corrosionvs. carbon hlau (nyob ntawm ib puag ncig).
Patina tsim: Xeb ruaj khov rau hauv lub xim tsaus xim tiv thaiv ntau dua li 6-18 lub hlis.
4. Tej Yam Kev Cuam Tshuam
Tsis tau meej meej yuav tsum muaj nyob rau hauv Astm A242, tab sis feem ntau ua tau zoo nyob rau hauvSub-Pes Tsawg Qhov Kub.
Kev sib piv: ASTM A242 thiab cov EN 10025-5 (s355j0wp)
| Ntiag tug | ASTM A242 | S355J0WP (EN 10025-5) |
|---|---|---|
| Paib lub zog | 345 MPa (tsawg dua los yog sib npaug rau 20mm) | 355 MPa |
| Corrosion Kuj | Siab heev | Siab heev |
| Phosphorus (p) cov ntsiab lus | 0.07–0.15% | 0.08–0.15% |
| Tus qauv tseem ceeb | ASTM (USA) | En (Tebchaws Europe) |
| Cov qhab nia sib npaug | Corten A, A588 Qib A | S355J2WP, S355K2W + N |
Cov Kev Siv Cov Ntawv Siv
✔ Txuas hniav & Kev Loj Girders(xeb-xim aesthetic + durability).
✔ Kev Hloov Kho Cov Yees & Sab Nraud Duab puab.
✔ Cov thawv xa khoom & tsheb ciav hlau.
✔ Cov Kws Ua Haujlwm Cladding(niaj hnub "corten" saib).
Fabrication & Vuam Cov Lus Qhia
Txiav: Ntshav, laser, lossis cov tub rog oxyfuel zoo tshaj plaws.
Vuam: SivCov hluav taws xob qis-hydrogen) (E7018).
Preheating: Recommended for thick sections (>25mm).
Dabtsi yog khoov: Ua tau tab sis yuav tsum tau saib xyuas vim muaj zog.
