S275J0yog ib qho uas tsis yog - alloy structural steel qib nrog qhov tsawg kawg nkaus lub zog ntawm 275 MPa thiab lav qhov cuam tshuam toughness ntawm 0 degree, ua rau nws tsim nyog rau kev tsim kho nyob rau hauv ib puag ncig txias uas yuav tsum tau tiv thaiv nkig tawg ntawm qhov txias txias, xws li txuas hniav, lub tsev thav duab, thiab kev txhawb nqa sab nraum zoov hauv huab cua sov.
S355J0yog siab dua -lub zog, feem ntau micro-alloyed structural steel nrog qhov tsawg kawg nkaus yield zog ntawm 355 MPa thiab tib yam toughness ntawv pov thawj ntawm 0℃. Nws yog tsim los rau kev thov ntau dua hauv cov xwm txheej txias, qhov uas nws lub zog zoo dua tso cai rau cov khoom sib dua, nyias nyias hauv qhov hnyav- cov qauv rhiab heev xws li ntev - txuas txuas, cov tshuab hnyav, thiab kev teeb tsa sab nrauv.
Qhov sib txawv tseem ceeb ntawm S275J0 thiab S355J0 yog nyob rau hauv lawv lub zog, tshuaj muaj pes tsawg leeg, thiab cov ntaub ntawv uas tau tshwm sim, thaum lawv sib piv qhov qis qis - qhov ntsuas kub toughness. Ob leeg yog cov qauv hlau raws li EN 10025-2 nrog kev cuam tshuam toughness kuaj ntawm 0 degree.
Kev sib piv ncaj qha:
| Khoom | S275J0 | S355J0 |
|---|---|---|
| Yam tsawg kawg nkaus Yield Strength | 275 MPa (rau thickness Tsawg dua lossis sib npaug li 16 hli) | 355 MPa (rau thickness Tsawg dua lossis sib npaug li 16 hli) |
| Tensile zog | 410-560 MPa | 470-630 MPa |
| Qhov Tseem Ceeb | Tsawg zog, dav dav -lub hom phiaj siv nyob rau hauv cov huab cua txias. | ~ 29% siab zog tawm los, tso cai rau sib dua / thinner seem rau tib lub load. |
| Impact Toughness | 27j0 qib | 27j0 qib |
| Tshuaj muaj pes tsawg leeg | Tsis yog- hlau alloy. Tsawg carbon & manganese txwv. | Feem ntau micro-alloyed (nrog Nb, V, thiab lwm yam) rau siab zog; siab Mn cov ntsiab lus. |
| Qhov hnyav Efficiency | Haum rau nruab nrab loads. | Lub zog siab dua - rau - qhov hnyav piv - txo cov khoom siv thiab qhov hnyav hauv kev tsim. |
| Nqi | Feem ntau tus nqi qis dua ib tuj. | Feem ntau kim dua vim alloying thiab ntau zog. |
| Tej kev siv | Lub teeb / nruab nrab cov qauv hauv cov huab cua txias: lub tsev thav duab, kev txhawb nqa, platforms. | Hnyav los yog hnyav- cov qauv rhiab heev nyob rau hauv huab cua txias: txuas hniav, cranes, offshore modules, loj -span halls. |
Cov kev cuam tshuam:
Zog & Tsim:
S355J0 muab qhov muaj peev xwm ntau dua. Rau tib tus ntoo khaub lig- ntu, nws tuaj yeem nqa tau hnyav dua. Xwb, cov neeg tsim qauv siv tau cov ntu nyias lossis sib dua nrog S355J0 kom ua tiav qhov kev ua tau zoo ib yam li S275J0, txo qhov hnyav thiab muaj peev xwm tag nrho cov nqi (txawm tias cov khoom siv ntau dua ib tuj).
Cov txheej txheem xaiv cov khoom:
Xaiv S275J0 thaum:
Cov qauv tsim yog nruab nrab, thiab tag nrho lub zog ntawm S355J0 yog qhov tsis tsim nyog.
Tus nqi yog qhov kev txwv tseem ceeb, thiab kev txuag qhov hnyav tsis yog qhov tseem ceeb.
Tus qauv tsis xav tau lub zog siab - mus rau - hnyav optimization.
Xaiv S355J0 thaum:
Lub zog siab yog xav tau los txo qhov loj me lossis qhov hnyav (piv txwv li, ntev-span beams, mobile structures).
Tus qauv tsim yog qhov hnyav-sensitive (piv txwv li, thauj mus los, sab saum toj ntawm ntug dej hiav txwv).
Tus nqi ntawm cov khoom siv ntau dua yog tsim nyog los ntawm kev txuag tag nrho hauv kev tsim, kev thauj mus los, lossis kev teeb tsa.
Zoo sib xws:
Ob leeg lav qhov cuam tshuam tib yam ntawm qhov hnyav ntawm 0℃("J0"), ua rau lawv sib npaug haum rau qhov chaw txias mus rau qhov txias txias.
Ob leeg xav tau kev tiv thaiv corrosion (thaum xim, galvanizing) rau kev siv sab nraum zoov.
Ob leeg muaj kev sib txuas zoo, txawm tias S355J0 yuav xav tau kev tswj xyuas cov txheej txheem ntau dua vim nws cov pa roj carbon ntau dua.
Hauv cov ntsiab lus:
Qhov kev xaiv yog qhov tseem ceeb ntawm tus nqi -effectiveness (S275J0) thiab siab zog / hnyav efficiency (S355J0), nrog rau ob qho tib si kom ntseeg tau tias nyob rau hauv txias txias. Rau cov haujlwm tswj hwm los ntawm cov qauv kev lis kev cai, qib yuav tsum tau muaj feem ntau teev los ntawm tus kws ua choj raws li suav cov kev ntxhov siab thiab cov hom phiaj ua kom zoo.
1. S275J0 steel yog dab tsi?
S275J0 yog ib qho uas tsis yog- alloy structural steel qib ib EN 10025-2, nrog rau qhov tsawg kawg nkaus lub zog ntawm 275 MPa thiab lav qhov cuam tshuam toughness ntawm 0℃.
2. Qhov 'J0' hauv S275J0 txhais li cas?
Lub 'J0' qhia tias Charpy V- ntsuas qhov cuam tshuam ntawm 0 degree, kom ntseeg tau tias lub zog nqus tsawg kawg ntawm 27 Joules siv rau hauv qhov chaw txias.
3. Qhov txawv ntawm S275JR thiab S275J0 yog dab tsi?
S275JR raug kuaj xyuas ntawm +20 degree, thaum S275J0 raug kuaj ntawm 0 degree, ua J0 haum rau cov qauv raug rau ze - khov kub.
4. Cov ntawv thov tseem ceeb ntawm S275J0 yog dab tsi?
Nws yog siv rau hauv cov khoom siv rau cov txuas hniav, cov tsev, thiab sab nraum zoov infrastructure nyob rau hauv temperate climates qhov twg kub yuav poob mus rau 0 degree.
5. Lub zog tawm ntawm S275J0 yog dab tsi?
Qhov tsawg kawg nkaus yield zog yog 275 MPa rau thicknesses mus txog 16 hli, nrog txo qhov tseem ceeb rau thicker seem raws li tus qauv.
6. S275J0 puas tuaj yeem welded?
Yog lawm, S275J0 muaj weldability zoo. Txawm li cas los xij, preheating lossis tswj cov txheej txheem yuav raug pom zoo rau cov ntu tuab lossis vuam hauv cov xwm txheej txias.
7. Puas yog S275J0 sib npaug rau ASTM A572 Qib 50?
Tsis ncaj. Txawm hais tias ob qho tib si muaj lub zog zoo sib xws (~ 345 MPa rau A572 Gr 50 vs . 275 MPa rau S275J0), A572 Qib 50 muaj lub zog ntau dua thiab cov kev xav tau sib txawv.
8. Cov tshuaj muaj pes tsawg leeg ntawm S275J0 yog dab tsi?
Nws feem ntau muaj max 0.21% Carbon, max 1.50% Manganese, thiab tswj qib ntawm phosphorus thiab sulfur (piv txwv li, P Tsawg dua lossis sib npaug li 0.035%, S Tsawg dua lossis sib npaug li 0.035%).
9. Puas yog S275J0 corrosion resistant?
Tsis yog, S275J0 tsis yog corrosion- tiv taus thiab yuav tsum muaj cov txheej txheem tiv thaiv xws li pleev xim lossis galvanizing rau sab nraum zoov.
10. Qhov txawv ntawm S275J0 thiab S355J0 yog dab tsi?
S355J0 muaj qhov siab tshaj qhov ua tau zoo tshaj plaws (355 MPa) tab sis zoo sib xws cuam tshuam toughness ntawm 0 degree, ua rau nws muaj zog rau txias - huab cua kev siv.
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.
