S355J2yog ib tug dav siv nyob sab Europe tus qauv (EN 10025-2) siab -lub zog, low-carbon structural steel. Nws yog tus cwj pwm los ntawm nws zoo heev weldability, toughness, thiab siab yield zog.
Ntsiab Specifications & Lub ntsiab lus
Lub npe "S355J2" tawg raws li hauv qab no:
S: Qhia txog cov qauv hlau.
355: Sawv cev qhov tsawg kawg nkaus Yield Strength ntawm 355 MPa (rau thicknesses Tsawg dua los yog sib npaug rau 16 hli).
J2: Qhia qhov cuam tshuam toughness. Nws yuav tsum ncav cuag qhov tsawg kawg nkaus ntawm 27 Joules thaum lub sij hawm Charpy V-qhov ntsuas qhov cuam tshuam ntawm -20℃.
1.0577: Tus lej ntawm cov khoom siv raws li EN system.
Mechanical & Physical Properties
Tensile Strength: Feem ntau yog nyob ntawm 470 txog 630 MPa.
Weldability: Highly weldable nrog qhov siab tshaj plaws Carbon Equivalent Value (CEV) ntawm kwv yees li 0.47.
Hom Kev Xa Khoom: Feem ntau muab raws li S355J2+N, qhov "+N" qhia tias nws tau ua haujlwm zoo (kwv yees lossis cua sov-kho rau lub xeev normalized) txhawm rau txhim kho cov qauv nplej thiab tawv.
Cov ntawv thov siv
Vim nws lub zog - mus rau - qhov hnyav piv thiab durability nyob rau hauv qis kub, nws yog siv nyob rau hauv:
Civil Engineering: choj, vaj tse, thiab kis tau tus yees.
Heavy Machinery: cranes, excavators, mining khoom, thiab trailers.
Maritime/Energy: Offshore lug, shipbuilding, thiab cua turbines.
Kev Lag Luam: Cov hlab ntsha siab, kev tsheb ciav hlau axles, thiab cov pas nrig txuas.
S355J2 steel feem ntau yog siv rau hauv cov qauv siv uas xav tau lub zog zoo ua ke nrog kev lees paub qhov tawv ntawm sub- xoom kub. Nws cov ntsiab lus tseem ceeb- kev ntsuas cuam tshuam ntawm -20℃-ua rau nws haum rau ib puag ncig thiab cov qauv raug rau huab cua txias lossis cov khoom hnyav.
Nov yog nws cov kev siv ntau tshaj plaws:
1. Lub Tsev & Kev Tsim Kho
Steel thav duab rau cov tsev lag luam, cov chaw ua lag luam, thiab cov tsev khaws khoom hauv thaj chaw sov thiab txias.
Txhawb cov qauv uas tsawg-kub toughness yog qhov yuav tsum tau muaj kev nyab xeeb.
2. Txuas hniav & Infrastructure
Choj Cheebtsam (girders, trusses, decks) raug rau lub caij kub poob.
Overpasses, highway signage gantries, thiab railway choj.
3. Offshore & Marine Structures
Platforms, txoj kev taug kev, thiab cov tsho txhawb nqa hauv cov roj thiab roj tawm sab nraud (rau cov khoom tsis yog-thawj, tsis yog- thaj chaw txaws).
Shipbuilding rau sab hauv structural qhov chaw, txawm tias cov qib tshwj xeeb yog siv rau hulls.
4. Cov khoom siv hnyav & tshuab
Cranes, lifting khoom, thiab excavator booms uas ua haujlwm nyob rau hauv lub caij ntuj no.
Mining thiab quarrying khoom thav ntawv thiab cov qauv.
5. Zog & Kev xa tawm
Cua turbine yees (tshwj xeeb tshaj yog nyob rau hauv cov huab cua txias), qhov uas tsis muaj - kub toughness yog qhov tseem ceeb.
Cov ncej xa hluav taws xob thiab hluav taws xob pylons hauv cheeb tsam nrog lub caij ntuj no txias.
6. Kev Fabrication
Heavy-cov haujlwm welded thav duab rau kev siv tshuab, xovxwm, thiab khoom siv ua liaj ua teb.
Qhov laj thawj tseem ceeb rau nws siv:
Lub npe "J2" muab kev ruaj ntseg. Cov kws tsim qauv xaiv S355J2 dhau tus qauv S355JR lossis qhov sov dua- huab cua S355J0 thaum tus qauv tsim qhov kub thiab txias qis dua 0 degree, kom ntseeg tau tias nws tseem tiv taus cov pob txha tawg thaum muaj kev cuam tshuam lossis kev ntxhov siab hauv huab cua txias.
Nco tseg: Rau qhov tseem ceeb tshaj qhov qis dua - daim ntawv thov kub (piv txwv li, qis dua -20℃lossis hnyav hnyav hnyav), qib xws li S355K2 (siab dua lub zog) lossis S355NL (kuaj ntawm -50 degree) feem ntau tau teev tseg.
1. S355J2 Steel yog dab tsi?
S355J2 yog European tus qauv qauv steel nrog qhov tsawg kawg nkaus tawm lub zog ntawm 355 MPa thiab lav qhov cuam tshuam toughness ntawm 27 Joules ntawm -20 degree, ua rau nws haum rau cov ntawv thov kub tsawg.
2. Qhov txawv ntawm S355J0 thiab S355J2 yog dab tsi?
Qhov sib txawv tseem ceeb yog qhov ntsuas qhov ntsuas kub. S355J0 raug kuaj ntawm 0 degree, thaum S355J2 raug kuaj ntawm -20 degree, muab S355J2 zoo dua qhov kub thiab txias toughness rau qhov chaw txias dua.
3. Qhov 'J2' txhais li cas hauv S355J2?
Lub 'J2' qhia cov hlau cuam tshuam rau qib toughness. 'J' txhais tau hais tias qhov tsawg kawg nkaus Charpy V-qhov cuam tshuam lub zog yog 27 Joules, thiab '2' txhais tau tias qhov kev xeem tau ua ntawm -20℃.
4. Lub zog tawm ntawm S355J2 yog dab tsi?
Qhov tsawg kawg nkaus tawm lub zog yog 355 MPa rau tuab txog 16 hli, tab sis nws txo qis rau cov ntu tuab (piv txwv li, 345 MPa rau 16-40mm, 335 MPa rau 40-63mm) raws li EN 10025-2.
5. Puas yog S355J2 sib npaug rau ASTM A572 Qib 50?
Lawv feem ntau sib piv rau lub zog, tab sis S355J2 muaj qhov yuav tsum tau ua kom tawv tawv ntawm -20 degree, thaum ASTM A572 Gr. 50 yuav tsum muaj kev cuam tshuam los ntawm tus neeg yuav khoom.
6. S355J2 puas tuaj yeem welded?
Yog lawm, S355J2 muaj weldability zoo. Txawm li cas los xij, cov txheej txheem tsim nyog-xws li kev siv cov khoom siv tsawg tsawg- hydrogen electrodes thiab siv preheat rau cov seem tuab- yuav tsum tau ua raws li kev tswj hwm nws cov khoom siv kho tshuab.
7. S355J2+N yog dab tsi?
Lub '+ N' txhais tau hais tias cov hlau yog muab rau hauv ib qho kev ua kom zoo lossis ua kom zoo dua qub. Cov txheej txheem no refines cov qauv nplej, txhim kho toughness thiab ua rau cov hlau ntau zam txim rau vuam, tshwj xeeb tshaj yog nyob rau hauv thicker seem.
8. Cov Khoom Siv Tshuaj Ntawm S355J2 yog dab tsi?
S355J2 tau tswj cov qib carbon, manganese, silicon, phosphorus, thiab sulfur. Nws qhov siab tshaj plaws Carbon Equivalent (CEV) kuj txwv, feem ntau nyob ib ncig ntawm 0.40-0.45, kom ntseeg tau zoo weldability.
9. Lub zog tensile ntawm S355J2 yog dab tsi?
Rau cov tuab tuab (tsawg dua lossis sib npaug li 40 hli), lub zog tensile yog li ntawm 470 MPa txog 630 MPa, raws li tau teev tseg hauv EN 10025-2 tus qauv.
10. S355J2 Steel siv qhov twg?
Nws yog dav siv nyob rau hauv cov ntaub ntawv uas raug rau huab cua txias, xws li txuas hniav, lub tsev thav duab, offshore qauv, cranes, thiab cov khoom hnyav uas tsis tshua muaj - kub toughness yog ib qho tseem ceeb.
11. Qhov ceev ntawm S355J2 yog dab tsi?
Zoo li feem ntau cov qauv carbon steels, qhov ceev ntawm S355J2 yog kwv yees li 7,850 kg / m³ (los yog 7.85 g / cm³).
12. Puas yog S355J2 Corrosion Resistant?
Tsis yog, S355J2 tsis yog corrosion{2}}resistant (weathering) steel. Nws yog cov pa roj carbon steel uas yuav xeb yog tias raug rau cov khoom tshwj tsis yog muaj kev tiv thaiv los ntawm cov xim, galvanizing, lossis lwm yam txheej.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
