S275 JRyog 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.
Cov ntsiab lus tseem ceeb
Lub npe "S275JR" muab cov ntsiab lus ntawm cov khoom siv:
S: Qhia tau hais 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.
Puas yog S275JR sib npaug rau ASTM A36?
Tsis yog, S275JR tsis yog qhov sib npaug ncaj qha rau ASTM A36, txawm hais tias lawv ob leeg tau siv dav raws li dav dav - lub hom phiaj cov qauv hlau thiab sib faib cov ntawv siv zoo sib xws. Qhov sib txawv tseem ceeb nyob hauv lawv qhov muaj nuj nqis ntawm lub zog, kev sim ntsuas, thiab cov qauv kev tswj hwm.
Qhov txawv tseem ceeb:
| Khoom | S275JR (EN 10025-2) | ASTM A36 (Tebchaws Asmeskas) |
|---|---|---|
| Yam tsawg kawg nkaus Yield Strength | 275 MPa (rau thickness Tsawg dua lossis sib npaug li 16 hli) | 250 MPa (≈36 ksi) |
| Tensile zog | 410-560 MPa | 400-550 MPa |
| Kev ntsuam xyuas cuam tshuam | Yuav tsum tau – 27 J ntawm +20℃(qhov yuav tsum tau "JR") | Tsis xav tau los ntawm lub neej ntawd (tsuas yog teev los ntawm tus neeg yuav khoom) |
| Kev tswj hwm tus qauv | Teb chaws Europe (EN) | Asmeskas (ASTM) |
| Tshuaj muaj pes tsawg leeg | Tighter tswj ntawm P, S; txawv me ntsis C/Mn txwv | Ntau qhov sib txawv ntawm qhov sib txawv |
Cov kev cuam tshuam:
Lub zog: S275JR yog qhov muaj zog me ntsis hauv kev tawm dag zog (275 MPa vs . 250 MPa). Hauv qee qhov qauv tsim, qhov no yuav tso cai rau cov khoom siv me me yog hloov A36 nrog S275JR.
Toughness: S275JR lav qhov cuam tshuam toughness ntawm chav tsev kub, thaum A36 tsis tshwj tsis yog tshwj xeeb xaj nrog cov kev xav tau ntxiv (xws li, A36 nrog Charpy kuaj).
Cov Cai & Kev Pom Zoo: Rau cov haujlwm tswj hwm los ntawm European cov lej (Eurocodes), S275JR yog cov khoom siv. Rau Asmeskas cov lej (AISC, ASME), A36 yog lub neej ntawd. Kev hloov pauv feem ntau xav tau kev pom zoo engineering thiab yuav suav nrog kev suav rov qab lossis kev sim ntxiv.
Qhov ze tshaj ASTM sib npaug:
Qib ASTM ze tshaj plaws nyob rau hauv cov nqe lus ntawm ob qho tib si lub zog thiab yuav tsum muaj kev cuam tshuam cov khoom yog ASTM A529 (Qib 50, yield 345 MPa, nrog rau qhov yuav tsum tau muaj), tab sis nws tseem txawv ntawm qib zog.
Xaus: Thaum S275JR thiab A36 yog kev lag luam sib pauv tau rau ntau yam tsis yog - tseem ceeb, kev tsim khoom siv dav dav, lawv tsis sib npaug vim qhov sib txawv ntawm lub zog minima thiab yuav tsum tau ntawv pov thawj toughness. Ib qho kev hloov pauv hauv kev tswj hwm kev tsim kho lossis kev tsim khoom yuav tsum raug soj ntsuam los ntawm tus kws tsim qauv tsim nyog thiab ua raws li cov qauv tsim qauv.
S275JR carbon steel phaj sib npaug qib:
Ceeb toom! Tsuas yog siv tau
| EU | Lub teb chaws Yelemees | Nyiv | Fabkis | European qub | Ltalis | Tuam Tshoj | Austria | Norway | Russia | Inter | Portugal | Is Nrias teb |
| EN | DIN, NWS | JIS | AFNOR | EN | UNI | GB | ONORM | NS | GOST | ISO | NP | YOG |
| S275 JR | RWB 42-2 | TSI 400 | E28-2 | Fe430 ib | Fe430 ib | Q275 | St42 F | TIAB SA 12142 | St4ps ib | E275B | FE430-B | TIAB SA 2062 |
| Ib 44-2 | St430B | St4sp |
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 tawm 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.
