ASTM A252 Qib 3 cov khoom siv yog dab tsi
Kev faib tawm tus qauv: Tus qauv rau cov kav hlau steel rau pawg hauv paus (ASTM A252-19) tsim los ntawm American Society for Testing and Materials (ASTM).
Qib txhais: Qib siab tshaj plaws (Qib 3) hauv cov qauv no, tsim los rau cov khoom hnyav thiab hnyav hnyav.
Cov txheej txheem tsim khoom: Feem ntau welded steel kav (ncaj seam weld / kauv weld); seamless manufacturing yuav tsum tau tshwj xeeb customization.
| Performance Dimension | Technical Parameter | Engineering tseem ceeb |
|---|---|---|
| Yield zog | Ntau dua lossis sib npaug rau 310 MPa (45 ksi) | Tiv thaiv cov av sib sib zog nqus thiab tiv thaiv pawg buckling |
| Tensile zog | 455-565 MPa (66-82 ksi) | Withstands cuam tshuam / hloov loads (xws li, nthwv dej quab yuam hauv cov dej num offshore) |
| Elongation | Ntau dua lossis sib npaug li 23% | Absorbs seismic / nthwv dej zog (tseem ceeb rau thaj chaw av qeeg zoo li Tokyo Bay tej yaam num) |
| Cov ntsiab lus carbon | Tsawg dua lossis sib npaug li 0.22% | Txo txoj kev pheej hmoo ntawm vuam tawg (tseem ceeb rau tuab- cov yeeb nkab phab ntsa) |
| P/S Tswj | P Tsawg dua lossis sib npaug rau 0.025%, S Tsawg dua lossis sib npaug li 0.035% | Tiv thaiv corrosion tus nqi (txuas ntxiv kev pab cuam lub neej nyob rau hauv marine ib puag ncig) thiab mitigates txias brittleness (tseem ceeb rau LNG tej yaam num ntawm -162 degree) |
A252 GR3 Yeeb Nkab Piles specification
Chaw tsim tshuaj paus: Carbon Seamless Steel Yeeb Nkab / Carbon ERW Steel Yeeb Nkab
Loj:
OD: 168-700mm
WT: 2-80mm / 323.8-1500mm
WT: 8-80mm
Qib: Gr1, Gr2, Gr3
Ntev: 6M lossis ntev raws li qhov xav tau.
Xaus: Plain End, Beveled End.
Kev sib piv ntawm A252 GR3 vs ST52-3
| Sib piv Dimension | ASTM A252 GR3 | EN 10225 ST52-3 |
|---|---|---|
| Hom Lub Hom Phiaj | Hlau yeeb nkab rau pawg hauv paus (ASTM A252) | Weldable zoo grain structural steel (EN 10225) |
| Daim ntawv thov tseem ceeb | Lub hauv paus tob (skyscrapers, hla- hiav txwv choj) | Engineering machinery, siab hlab ntsha, steel qauv |
| Kev tsim khoom | Feem ntau welded yeeb nkab (longitudinal / kauv) | Hlau daim hlau / profile (rau vuam / machining) |
| Kev Pabcuam Ib puag ncig | Av / dej hiav txwv corrosion + hnyav loads | Ambient los yog qis -kub qauv |
| Tshuaj muaj pes tsawg leeg | ||
| - Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.22% | Tsawg dua lossis sib npaug li 0.20% |
| - Phosphorus (P) | Tsawg dua lossis sib npaug li 0.025% | Tsawg dua lossis sib npaug li 0.025% |
| - Sulfur (S) | Tsawg dua lossis sib npaug li 0.035% | Tsawg dua lossis sib npaug rau 0.020% (stricter) |
| - Manganese (Mn) | Tsis muaj kev txwv siab (hloov rau kev ua haujlwm) | 0.90–1.60% |
| Mechanical Properties | ||
| - Yield zog (MPa) | Ntau dua lossis sib npaug rau 310 | Ntau dua lossis sib npaug rau 355 (siab dua) |
| - Tensile zog (MPa) | 455–565 | 470–630 |
| - Elongation (%) | Ntau dua lossis sib npaug 23 | Ntau dua lossis sib npaug rau 22 (rau thickness Tsawg dua lossis sib npaug li 16 hli) |
| - Impact toughness | Tsis yuam | Ntau tshaj lossis sib npaug rau 27J ntawm -20 degree(qis -kub yuav tsum tau) |
| Kev tiv thaiv corrosion | Yuav tsum tau txheej + cathodic tiv thaiv(piv txwv li, 3PE / galvanizing) | Kev kho deg raws li xav tau (painting / txheej) |
| Tej yaam num | Hong Kong-Zhuhai-Makao Choj (piles), Shanghai Ntauwd (sib sib zog nqus pawg) | Crane booms (SANY Heavy Industry), LNG tank liners |
Kev xeem yuav tsum tau
| Cov khoom soj ntsuam | Txuj kev xav tau | Txoj Kev Xeem |
|---|---|---|
| Tshuaj muaj pes tsawg leeg | - C Tsawg dua lossis sib npaug li 0.22%, P Tsawg dua lossis sib npaug 0.025%, S Tsawg dua lossis sib npaug 0.035% - Lwm cov ntsiab lus ua raws li ASTM A252-19 |
OES (Optical Emission Spectrometry) + Kev soj ntsuam ntub dej hauv chav kuaj |
| Dimensional kam rau ua | - OD: ± 0.5% lossis ± 3.2mm (qhov twg ntau dua) - Phab ntsa thickness: ± 10% ntawm nominal thickness |
Caliper/Laser gauge + Ultrasonic thickness gauge |
| Weld kev ncaj ncees | - Dawb los ntawm cov kab nrib pleb, tsis muaj fusion, nruam porosity - Kauv weld reinforcement Tsawg dua lossis sib npaug li 3.2mm |
VT (Visual Testing) + UT (Ultrasonic Testing) |
| Nto Zoo | - No scratches/dents >5% ntawm phab ntsa thickness - Tsis muaj laminations, scabs, lossis corrosion pits |
Kev kuaj pom pom + ntsuas qhov tob |
Ntim thiab shipping
