S275 JRyog ib qho tsis yog{0}} alloy structural steel qib nrog qhov tsawg kawg nkaus lub zog ntawm 275 MPa, feem ntau siv hauv kev tsim kho thiab tshuab. Nws yog qhov cuam tshuam- sim ntawm +20°C kom ntseeg tau tias qhov yooj yim toughness rau daim ntawv thov nyob rau hauv nruab nrab los yog tswj ib puag ncig uas tsis kub tsis muaj kev txhawj xeeb.
S275J2yog ntau dua -toughness variant nrog tib lub zog tawm los ntawm 275 MPa, tab sis cuam tshuam - kuaj ntawm -20 ° C los lav tiv thaiv cov pob txha tawg hauv cov huab cua txias. Nws yog siv rau hauv cov qauv tsim xws li txuas hniav, yees, thiab kev teeb tsa ntawm ntug dej hiav txwv uas qhov kub thiab txias tuaj yeem poob qis qis, muab kev nyab xeeb tseem ceeb thiab kev ntseeg siab hauv cov xwm txheej hnyav.
Thawj qhov sib txawv ntawm S275JR thiab S275J2 yog nyob rau hauv lawv qhov cuam tshuam toughness ntawm qhov sib txawv ntawm qhov kub thiab txias, uas txiav txim siab lawv qhov tsim nyog rau qhov chaw txias. Ob qib muaj qhov tsawg kawg nkaus tawm lub zog (275 MPa), tab sis lawv tau tsim kho rau cov kev pabcuam sib txawv.
Kev sib piv tseem ceeb:
| Khoom | S275 JR | S275J2 |
|---|---|---|
| Impact Toughness Test Temperature | +20 °C (Room Kub) | -20 °C (Sub-zero) |
| Yam tsawg kawg nkaus zog | 27 J ntawm +20°C | 27 J ntawm -20 ° C |
| Hom Siv Case | Cov qauv dav dav hauv cov huab cua nruab nrab (hauv tsev lossis qhov twg temps tsis tshua poob qis dua 0 ° C). | Cov qauv hauv cov huab cua txias uas qhov kub tsis tu ncua poob qis dua qhov khov (piv txwv li, txuas hniav, cov chaw sab nrauv, kev tsim kho lub caij ntuj no). |
| Txheej txheem ntau lawm | Tej zaum yuav muab tau raws li -rolled; tsis muaj qhov tshwj xeeb qis- yuav tsum tau kho qhov kub. | Feem ntau normalized los yog tswj tau- dov kom ua tau zoo grain qauv rau qis- kub toughness. |
| Nqi | Tsawg (tus qauv tsim). | Siab dua (vim cov txheej txheem nruj dua thiab kev sim). |
Cov kev cuam tshuam:
Temperature Suitability:
S275 JRyog tsim rau cov ntawv thov uas qhov kev khiav hauj lwm kub tseem nyob saum 0 ° C. Nws tuaj yeem ua nkig hauv qhov chaw khov.
S275J2yog tsim los kom nyob twj ywm ductile thiab tiv thaiv nkig tawg mus rau -20 ° C, ua rau nws muaj kev nyab xeeb rau cov cheeb tsam txias.
Code & Specification Ua raws li:
Cov lej tsim kho (piv txwv li, Eurocodes) qhia cov qhab nia raws li qhov ntsuas qhov ntsuas qhov ntsuas qis tshaj plaws. S275J2 yog qhov yuav tsum tau rau cov qauv hauv cov cheeb tsam txias, thaum S275JR yog qhov siv tau rau huab cua lossis sab hauv tsev.
Kev nyab xeeb & kev ntseeg tau:
Siv S275JR nyob rau hauv ib qho chaw txias yuav ua rau muaj kev puas tsuaj loj heev yog tias qhov kub thiab txias poob poob qis. S275J2 muab cov npoo kev nyab xeeb tiv thaiv cov kev pheej hmoo.
Interchangeability:
Lawv tsis tuaj yeem hloov pauv yam tsis muaj kev ntsuam xyuas engineering. Hloov S275JR rau S275J2 hauv qhov chaw txias ua txhaum cov qauv tsim thiab cuam tshuam kev nyab xeeb.
Cov ntsiab lus:
Xaiv S275JR rau kev tsim kho dav dav hauv cov huab cua me me.
Xaiv S275J2 rau cov qauv uas muaj qhov txias txias (piv txwv li, cov txuas sab nraum zoov, cov yees, lossis cov chaw ua haujlwm hauv cheeb tsam txias).
Lub npe 'J2' yog ib qho tseem ceeb qhia txog qhov qis- qhov kub thiab txias, ua kom muaj kev ncaj ncees nyob rau hauv lub caij ntuj no hnyav.
1. S275J2 steel yog dab tsi?
S275J2 yog ib qho 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 -20 ° C.
2. Qhov 'J2' hauv S275J2 txhais li cas?
Lub 'J2' qhia tias Charpy V- qhov ntsuas qhov cuam tshuam ntawm -20 ° C, ua kom lub zog nqus tsawg kawg ntawm 27 Joules siv rau hauv qhov chaw txias.
3. Cov ntawv thov tseem ceeb ntawm S275J2 yog dab tsi?
Nws yog siv rau hauv cov khoom siv uas raug rau cov huab cua txias, xws li txuas hniav, offshore platforms, xa cov yees, thiab cov tsev lag luam hauv cheeb tsam uas muaj lub caij ntuj no hnyav.
4. Qhov txawv ntawm S275JR thiab S275J2 yog dab tsi?
S275JR raug kuaj xyuas ntawm +20°C, thaum S275J2 raug kuaj ntawm -20 ° C, ua J2 haum rau cov ntawv thov uas kub poob qis hauv qab khov.
5. Lub zog tawm ntawm S275J2 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. S275J2 puas tuaj yeem welded?
Yog lawm, S275J2 muaj weldability zoo. Txawm li cas los xij, cov txheej txheem tsim nyog- suav nrog kev ua kom muaj peev xwm ua ntej thiab siv cov khoom siv hlau tsim nyog- yog qhov tseem ceeb, tshwj xeeb tshaj yog rau cov ntu tuab lossis vuam hauv qhov txias.
7. Cov tshuaj muaj pes tsawg leeg ntawm S275J2 yog dab tsi?
Nws feem ntau muaj max 0.20% Carbon, max 1.50% Manganese, thiab tswj qib ntawm phosphorus thiab sulfur (piv txwv li, P ≤ 0.035%, S ≤ 0.035%).
8. Puas yog S275J2 sib npaug rau ASTM A572 Qib 50?
Tsis yog, S275J2 muaj lub zog qis dua (275 MPa vs . 345 MPa) thiab suav nrog qhov yuav tsum tau ntsuas -20 ° C, thaum A572 Qib 50 feem ntau tsis muaj qhov yuav tsum tau ua kom muaj zog.
9. Qhov txawv ntawm S275J2 thiab S355J2 yog dab tsi?
S355J2 muaj qhov siab tshaj qhov ua tau zoo tshaj plaws (355 MPa) tab sis zoo sib xws cuam tshuam toughness ntawm -20 ° C, ua rau nws muaj zog rau kev siv huab cua txias.
10. Puas yog S275J2 corrosion resistant?
Tsis yog, S275J2 tsis yog corrosion-resistant. Zoo li lwm yam carbon steels, nws yuav tsum tau tiv thaiv txheej xws li pleev xim los yog galvanizing rau sab nraum zoov 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.
