S275JR yog ib qho uas tsis yog- alloy, qis- carbon structural steel qib txhais raws li European tus qauv EN 10025-2. Nws yog ib qho ntawm cov qib steel siv dav tshaj plaws hauv kev tsim kho thiab engineering vim nws cov khoom sib npaug thiab kev ua haujlwm zoo.
Ntsiab Specifications
Lub npe "S275JR" muab cov ntsiab lus ntawm cov khoom siv:
S: Qhia tias nws yog Cov Khoom Siv Hluav Taws Xob.
275: Qhia tawm qhov tsawg kawg nkaus lub zog ntawm 275 MPa (rau thicknesses tsawg dua los yog sib npaug rau 16 hli).
JR: Qhia txog Charpy V-qhov ntsuas qhov ntsuas qhov yuav tsum tau muaj tsawg kawg yog 27 Joules ntawm chav tsev kub (+20℃).
Daim ntawv thov
S275JR feem ntau yog siv rau kev tsim khoom ntev thiab tiaj tus rau welded lossis riveted qauv. Common siv muaj xws li:
Kev tsim kho:Beams, kab, thiab daim hlau rau cov tsev thiab txuas hniav.
Engineering:Tsawg-load tshuab qhov chaw xws li bushings, shafts, thiab axles.
Kev lag luam:Cia tanks, roj thiab roj platforms, thiab rail kev lag luam Cheebtsam.
Qhov Zoo Tshaj Plaws
Weldability:Nws cov ntsiab lus carbon tsawg ua rau nws yooj yim heev rau vuam siv cov txheej txheem txheem.
Machineability:Muab kev ua haujlwm zoo ua haujlwm zoo ib yam li lwm cov hlau me me.
Formability:Yuav ua tau yooj yim nkhaus, folded, los yog txias - tsim rau ntau yam qauv duab.
Cov khoom siv kho tshuab ntawm S275JR tau txhais los ntawm European tus qauv EN 10025-2. Cov txiaj ntsig tseem ceeb sib txawv nrog cov khoom tuab, uas yog qhov tseem ceeb ntawm kev tsim qauv.
Core Mechanical Properties (EN 10025-2):
| Khoom | Tus nqi ntau | Sau ntawv |
|---|---|---|
| Yield Strength (ReH) min | 275 MPa - rau nominal thickness Tsawg dua los yog sib npaug rau 16 hli. 265 MPa – for >16mm mus rau 40mm. 255 MPa – for >40mm txog 63mm. 245 MPa – for >63mm txog 80mm. 235 MPa – for >80mm txog 100mm. |
Txo nrog nce thickness. |
| Tensile zog (Rm) | 410 MPa rau 560 MPa | Siv thoob plaws txhua qhov tuab txog li 100 hli. |
| Elongation ntawm Fracture (A₅) min | 22%. 20 % – for thickness >40mm txog 63mm. 19 % – for thickness >63mm txog 100mm. |
Ntsuas ntawm qhov ntsuas qhov ntev ntawm 5.65√S₀.Qhia ductility; txo me ntsis nrog thickness. |
| Impact Toughness (KV) | Yam tsawg kawg 27 J ntawm +20 degree | Qhov kev xaiv "JR" ua rau Charpy V- ntsuas qhov ntsuas kub ntawm chav tsev. |
Ntxiv Cov Khoom Tseem Ceeb:
Qhov ceev: Kwv yees li 7.85 g / cm³.
Modulus ntawm Elasticity (Young's Modulus): ~ 210 GPa.
Poisson tus piv: ~ 0.3.
Shear Modulus: ~ 80 GPa.
Cov ntsiab lus tseem ceeb:
Lub zog: S275JR yog txhais los ntawm nws qhov tsawg kawg nkaus yield zog ntawm 275 MPa rau cov feem nyias nyias (tsawg dua los yog sib npaug rau 16 hli), muab lub peev xwm ntau dua li S235 qib.
Ductility: Cov txiaj ntsig zoo elongation (Ntau dua lossis sib npaug ntawm 19-22%) xyuas kom nws tuaj yeem tsim thiab yuav deform plastically ua ntej tawg.
Toughness: Qhov yuav tsum tau ua 27 J ntawm +20℃cuam tshuam kev ntsuas tau lees tias muaj kev tiv thaiv txaus rau cov pob txha tawg hauv ib puag ncig ib puag ncig.
Thickness nyob ntawm:Cov neeg tsim qauv yuav tsum siv cov txiaj ntsig muaj txiaj ntsig zoo raws li qhov tshwj xeeb tuab ntawm cov khoom siv, vim nws cuam tshuam rau kev nyab xeeb ntawm kev suav.
Cov khoom no ua rau S275JR qhov kev xaiv txhim khu kev qha rau kev tsim kho dav dav, thav duab, tshuab, thiab kev tsim kho vaj tse uas xav tau lub zog siab dua S235, tab sis qis - qhov kev pabcuam kub tsis yog qhov yuav tsum tau ua. Rau qhov chaw txias, qib zoo li S275J0 lossis S275J2 (nrog rau qhov hnyav ntawm 0℃lossis -20 degree) yuav tsum xaiv.
1. S275JR steel yog dab tsi?
S275JR 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 chav tsev kub (+20℃).
2. Lub zog tawm ntawm S275JR yog dab tsi?
Qhov tsawg kawg nkaus yield zog ntawm S275JR yog 275 MPa rau cov khoom thickness mus txog 16 hli, txo me ntsis rau thicker seem raws li tus qauv.
3. Qhov txawv ntawm S235JR thiab S275JR yog dab tsi?
S275JR muaj lub zog qis dua qhov qis dua (275 MPa vs . 235 MPa), muab kev thauj khoom ntau dua -cov kabmob muaj peev xwm rau qhov ntev thiab kev siv zoo sib xws.
4. Qhov 'JR' txhais li cas hauv S275JR?
Lub 'JR' qhia tau hais tias cov hlau yog Charpy V-qhov cuam tshuam ntawm qhov ntsuas ntawm +20℃nrog qhov tsawg kawg nkaus absorbed zog ntawm 27 Joules, ua kom chav tsev kub toughness.
5. Puas yog S275JR sib npaug rau ASTM A36?
Thaum nyob ze ntawm lub zog, S275JR (275 MPa yield) muaj zog me ntsis dua li tus qauv A36 (250 MPa yield) thiab suav nrog qhov yuav tsum tau muaj kev cuam tshuam, yog li lawv tsis sib npaug ncaj qha.
6. S275JR siv rau dab tsi?
Nws yog dav siv nyob rau hauv kev tsim kho, qauv thav duab, machinery Cheebtsam, txuas hniav, thiab kev lag luam daim ntawv thov uas yuav tsum tau muaj zog ntau dua S235 qib.
7. S275JR puas tuaj yeem welded?
Yog lawm, S275JR muaj qhov zoo weldability siv cov kev sib txawv xws li SMAW, MAG, lossis TIG, tsis tas yuav tsum tau ua ntej- cua sov nyob rau hauv ib txwm muaj thiab cov tuab tuab.
8. Cov tshuaj muaj pes tsawg leeg ntawm S275JR yog dab tsi?
Nws muaj pes tsawg leeg feem ntau suav nrog max 0.21% C, max 1.50% Mn, thiab tswj kev txwv rau phosphorus thiab sulfur (piv txwv li, P Tsawg dua lossis sib npaug rau 0.035%, S Tsawg dua lossis sib npaug 0.035%).
9. Puas yog S275JR corrosion resistant?
Tsis yog, S275JR tsis yog corrosion{1}}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.
10. Dab tsi yog cov khoom siv kho tshuab ntawm S275JR?
Cov khoom tseem ceeb suav nrog lub zog tawm los Ntau dua lossis sib npaug ntawm 275 MPa (rau t Tsawg dua lossis sib npaug li 16 hli), tensile lub zog ntawm 410-560 MPa, thiab elongation yam tsawg kawg nkaus ntawm 22-23% nyob ntawm thickness.
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.
