S355J2 yog ib qho kev siv dav hauv European tus qauv (EN 10025-2) siab-lub zog, qis carbon steel qauv. 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.
Ntiaj teb no sib npaug
Thaum tsis zoo ib yam, S355J2 feem ntau piv rau cov qib thoob ntiaj teb hauv qab no:
Tebchaws Asmeskas (ASTM): A572 Qib 50 yog qhov sib npaug ze tshaj plaws.
UK (Yav tas los BS): 50D.
Lub teb chaws Yelemees (Yav tas los DIN): St52-3.
Tuam Tshoj (GB): Q355D lossis Q345D.
Cov khoom siv kho tshuab ntawm S355J2 cov qauv hlau yog txhais los ntawm European tus qauv EN 10025-2: 2004. Cov no yog qhov tsawg kawg nkaus lav qhov tseem ceeb siv rau kev tsim. Cov txiaj ntsig tau los ntawm cov ntawv pov thawj zeb feem ntau yog siab dua.
Nov yog cov ncauj lus kom ntxaws:
1. Core Mechanical Properties (Thickness-Dependent)
Lub zog tawm los, lub zog tensile, thiab qee zaum elongation txawv nrog cov khoom tuab.
| Nominal Thickness (*t *) (mm) | Yield zog, ReH (min.) MPa | Tensile zog, Rm MPa | Elongation, A (min.) %(Longitudinal Test) |
|---|---|---|---|
| t Tsawg dua lossis sib npaug li 16 | 355 | 470 - 630 | 21 |
| 16 |
345 | 470 - 630 | 21 |
| 40 |
335 | 470 - 630 | 21 |
| 63 |
325 | 470 - 630 | 20 |
| 80 |
315 | 470 - 630 | 20 |
| 100 |
295 | 450 - 600 | 19 |
| 150 |
285 | 450 - 600 | 19 |
Nco tseg:Rau cov txheej txheem (kab kab, kab), cov thickness muaj feem xyuam yog lub nominal thickness ntawm flange.
2. Impact Toughness (Lub Defining "J2" Property)
Qhov no yog qhov yuav tsum tau thiab cov cuab yeej tseem ceeb uas txawv S355J2.
Test Standard: Charpy V-notch (ISO 148-1 los yog EN 10045-1).
Kev ntsuas kub: -20 ° C.
Yam tsawg kawg nkaus zog: 27 Joules.
Txoj cai: Qhov nruab nrab ntawm peb qhov kev kuaj kab mob transverse yuav tsum muaj ntau dua lossis sib npaug rau 27 J. Tsis muaj ib tus nqi yuav qis dua 70% ntawm qhov nruab nrab no (piv txwv li, Ntau dua lossis sib npaug rau 19 J).
3. Lwm yam tseem ceeb tshuab & lub cev muaj zog
| Khoom | Tus nqi / Cov ntaub ntawv | Txheem / Lus Cim |
|---|---|---|
| Modulus ntawm Elasticity (Young's Modulus) | 210,000 MPa (210 GPa) | Tus qauv tsim tus nqi rau cov hlau (EN 1993-1-1). |
| Shear Modulus | 81,000 MPa (81 GPa) | Tus qauv tsim tus nqi rau steel. |
| Poisson tus ratio | 0.3 | Txheem tus nqi rau steel. |
| Qhov ntom | 7,850 kg/m³ | Rau kev suav loj. |
| Khoov Test | Yuav tsum hla tsis muaj cracking. | Lub vojvoog khoov sab hauv muaj feem xyuam nrog cov tuab thiab qib zoo (tseem ceeb hauv EN 10025-2). |
4. Chemical Composition & Weldability (Indirectly Influences Mechanical Behavior)
Carbon Equivalent (CEV): Muaj qhov txwv siab tshaj plaws (feem ntau Tsawg dua lossis sib npaug rau 0.40 - 0.45 nyob ntawm qhov tuab). Qhov no ua kom zoo weldability, txawm tias cov txheej txheem tsim nyog (preheat rau cov seem tuab) tseem yuav tsum tau ua.
Cov ntsiab lus tseem ceeb: Tswj txwv rau Carbon (C), Manganese (Mn), Phosphorus (P), thiab Sulfur (S) kom muaj zog, toughness, thiab soundness.
Cov ntsiab lus rau Engineers thiab Designers:
Thickness yog qhov tseem ceeb: Ib txwm siv cov txiaj ntsig lub zog muaj txiaj ntsig sib haum rau qhov tseeb thickness ntawm lub caij hauv koj tus qauv tsim.
Toughness yog Guaranteed: Lub -20℃cuam tshuam toughness yog ib tug built-in kev ruaj ntseg feature rau cov qauv nyob rau hauv txias huab cua los yog raug rau dynamic loading.
Rau Precise Work: Daim ntawv pov thawj zeb xeem (MTC) yog qhov chaw tso cai rau lubqhov tseebcov khoom ntawm koj cov khoom tshwj xeeb ntawm cov hlau, uas yuav ua tau raws lossis tshaj qhov tsawg kawg nkaus.
Tsis yog Stainless lossis Weathering Steel: S355J2 tsis muaj qhov cuam tshuam corrosion thiab yuav tsum muaj cov txheej txheem tiv thaiv (xim, galvanizing) rau feem ntau cov ntawv thov sab nrauv.
Qhov kev sib xyaw ua ke ntawm lub zog, tau lees paub qhov qis- qhov kub thiab txias, thiab kev sib txuas zoo ua rau S355J2 yog ib qho ntawm cov qauv siv dav tshaj plaws rau cov choj, cov tsev, thiab cov qauv sab nrauv nyob rau thaj tsam huab cua thiab txias.
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.
