S235J2yog qib tsis yog- alloy structural steel qib nrog qhov tsawg kawg nkaus tawm los ntawm 235 MPa, tsim los siv rau hauv qhov chaw txias. Nws yog qhov cuam tshuam - kuaj ntawm -20℃kom ntseeg tau tias qhov hnyav tsawg kawg nkaus ntawm 27 Joules, ua rau nws tsim nyog rau cov qauv sib sib zog nqus, kev txhawb nqa, thiab cov thav duab hauv cov cheeb tsam uas muaj qhov kub thiab txias, xws li kev taug kev sab nraum zoov lossis lub tsev muaj teeb pom kev zoo.
S355J2yog siab dua -lub zog, feem ntau micro- alloyed structural steel nrog qhov tsawg kawg nkaus tawm lub zog ntawm 355 MPa. Nws kuj tau lees tias muaj kev cuam tshuam rau qhov hnyav ntawm -20℃(27 Joules), tab sis nws lub zog txhim kho tso cai rau nyias, sib zog ntu hauv kev xav tau cov ntawv thov xws li txuas hniav, cov tshuab hnyav, thiab cov qauv tawm sab nraud raug rau huab cua txias, txhim kho cov khoom siv tau zoo thiab muaj peev xwm thauj khoom.
S235J2 thiab S355J2 yog ob qho tib si cov qauv hlau uas muaj kev tiv thaiv qhov hnyav ntawm -20 degree, tab sis lawv txawv feem ntau hauv lub zog, muaj pes tsawg leeg, thiab cov ntawv thov raug.
Nov yog qhov sib piv ncaj qha:
| Khoom | S235J2 | S355J2 |
|---|---|---|
| Yield zog (ReH) | Yam tsawg kawg nkaus 235 MPa (thickness Tsawg dua lossis sib npaug li 16 hli) | Yam tsawg kawg nkaus 355 MPa (thickness Tsawg dua lossis sib npaug li 16 hli) |
| Tensile zog (Rm) | 360-510 MPa | 470-630 MPa |
| Impact Toughness | 27 J ntawm -20℃(Charpy V-notch) | 27 J ntawm -20℃(Charpy V-notch) |
| Tshuaj muaj pes tsawg leeg | Tsawg carbon & manganese cov ntsiab lus; standard non{0}} hlau alloy. | Ntau dua manganese, feem ntau micro-alloyed (piv txwv li, nrog Nb, V) rau lub zog. |
| Qhov ntom | 7.85 g / cm³ | 7.85 g / cm³ |
| Weldability | Zoo heev | Zoo, tab sis tej zaum yuav xav tau kev saib xyuas ntau dua (preheat / tswj) vim muaj cov pa roj carbon ntau dua. |
| Tej kev siv | Lub teeb / nruab nrab cov qauv hauv cov huab cua txias: kev taug kev, kev txhawb nqa lub teeb, thav duab. | Cov qauv hnyav dua nyob rau hauv cov huab cua txias: txuas hniav, offshore platforms, cranes, siab -cov khoom muaj zog. |
| Nqi & Luj Efficiency | Lub zog qis dua, feem ntau pheej yig dua rau lub teeb loads. | Lub zog siab dua tso cai rau nyias / sib zog seem rau tib lub thauj khoom, txhim kho cov khoom siv tau zoo. |
Key Takeaway:
Xaiv S235J2 rau cov ntawv thov kev ntxhov siab me ntsis uas tus nqi yog qhov tseem ceeb thiab qhov tuab tsis txwv.
Xaiv S355J2 kom muaj kev ntxhov siab ntau dua lossis hnyav dua - cov qauv tsim hauv qhov chaw txias, qhov twg nws lub zog zoo tuaj yeem txo qhov loj thiab qhov hnyav.
Ob leeg lav qhov qis qis -kub toughness (-20 degree), ua rau lawv haum rau cov qauv hauv cheeb tsam txias, tab sis S355J2 muaj lub zog tseem ceeb ntawm cov khoom siv ntau dua.
1. S235J2 steel yog dab tsi?
S235J2 yog ib qho tsis yog - alloy structural steel qib ib EN 10025-2, nrog rau qhov tsawg kawg nkaus lub zog ntawm 235 MPa thiab lav qhov cuam tshuam toughness ntawm -20℃.
2. Qhov 'J2' hauv S235J2 txhais li cas?
Lub 'J2' qhia tias Charpy V- ntsuas qhov cuam tshuam ntawm -20 degree, nrog rau qhov tsawg kawg nkaus absorbed zog ntawm 27 Joules, kom ntseeg tau tias tawv nyob rau hauv txias txias.
3. Qhov txawv ntawm S235JR thiab S235J2 yog dab tsi?
Qhov sib txawv tseem ceeb yog qhov ntsuas qhov kub thiab txias: S235JR raug kuaj ntawm +20 degree, thaum S235J2 raug kuaj ntawm -20 degree, ua J2 haum rau qhov chaw txias dua.
4. Dab tsi yog cov kev siv ntawm S235J2?
Nws yog siv nyob rau hauv cov qauv uas tsis tshua muaj kub, xws li sab nraum zoov txuas hniav, tso tsheb hlau luam, offshore platforms, thiab cov khoom muaj nyob rau hauv cov huab cua txias.
5. Cov tshuaj muaj pes tsawg leeg ntawm S235J2 yog dab tsi?
Nws feem ntau muaj max 0.17% C, 1.40% Mn, 0.035% P, 0.035% S, thiab raug tua / nplua- cov nplej kho kom zoo dua qub.
6. Puas yog S235J2 weldable?
Yog lawm, S235J2 muaj qhov zoo weldability siv ntau txoj hauv kev, tab sis preheating lossis tswj cov txheej txheem yuav xav tau rau cov ntu tuab lossis qhov chaw txias heev.
7. Lub zog tawm ntawm S235J2 yog dab tsi?
Qhov tsawg kawg nkaus tawm lub zog yog 235 MPa rau thicknesses tsawg dua los yog sib npaug rau 16 hli, txo me ntsis rau cov seem tuab raws li EN 10025-2.
8. Puas yog S235J2 sib npaug rau ASTM A36?
Tsis yog, thaum lub zog zoo sib xws, S235J2 suav nrog qhov yuav tsum tau qis - qhov ntsuas kub ntawm qhov yuav tsum tau muaj, tsis zoo li tus qauv A36, ua rau nws sib ze rau qib zoo li ASTM A709 Gr. 36.
9. S235J2 piv rau S355J2 li cas?
S355J2 muaj qhov siab tshaj qhov ua tau zoo tshaj plaws (355 MPa) tab sis zoo sib xws cuam tshuam toughness ntawm -20 degree, ua rau nws muaj zog rau kev siv huab cua txias.
10. Puas yog S235J2 corrosion resistant?
Tsis yog, nws tsis yog corrosion-resistant thiab yuav tsum tau tiv thaiv coatings (xws li, painting, galvanizing) rau sab nraum zoov los yog corrosive ib puag ncig.
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.
