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.
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.
Tus nqi ntawm S275JR cov qauv hlau yog cuam tshuam los ntawm kev sib txuas ntawm kev lag luam thoob ntiaj teb, kev tsim khoom, thiab cov khoom lag luam tshwj xeeb. Nov yog cov txheej txheem tseem ceeb:
1. Raw Material Costs (Primary Driver)
Hlau Ore & Coking Coal Nqe: Raws li cov ntaub ntawv hauv paus rau steelmaking, lawv cov nqi lag luam thoob ntiaj teb ncaj qha teeb tsa tus nqi hauv pem teb rau txhua yam khoom steel, suav nrog S275JR.
Cov Nqi Hlau Hlau: Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob (EAF) ntau lawm, muaj nyob hauv ntau thaj tsam, tso siab rau cov khoom seem. Cov khoom xav tau siab nce nqi.
2. Cov nqi zog & ntau lawm
Tus nqi zog: steel ntau lawm yog lub zog- hnyav. Volatility nyob rau hauv hluav taws xob, natural gas, thiab roj nqi ho cuam tshuam cov nqi tsim khoom, tshwj xeeb tshaj yog nyob rau hauv blast furnace ua hauj lwm.
Kev Tsim Khoom & Cov Nqi Ua Haujlwm: Cov nuj nqis cuam tshuam nrog kev ua haujlwm casting, dov, kev kho cua sov (normalizing rau S275JR), txiav, thiab kev ntsuas zoo.
3. Kev Lag Luam Kev Lag Luam & Kev Muag Khoom Dynamics
Ntiaj teb no & Regional Construction Activity: Muaj zog thov los ntawm kev tsim kho, infrastructure, thiab hnyav machinery sectors pushes nqi.
Cov Kev Pabcuam Ntiaj Teb: Cov kev cai lag luam (xws li, tariffs, quotas), kev txwv tsis pub xa tawm los ntawm cov neeg tsim khoom loj (xws li Tuam Tshoj), thiab kev cuam tshuam kev xa khoom tuaj yeem ua rau cov khoom lag luam nruj thiab nce nqi.
Cov Khoom Muag Qib: Tsawg Tshuag ntawm mills thiab distributors feem ntau ua rau cov nqi them nqi.
4. Daim Ntawv Thov Khoom & Specifications
Form & Dimensions: Nqe sib txawv ntawm cov khoom tsim:
Daim Ntawv / Phaj: Feem ntau tus nqi qis dua ib tuj dua li cov seem.
Ntu (Beams, Channels, Angles): Tus nqi siab dua vim muaj ntau txoj kev dov thiab qis ntau lawm.
Custom Sizes/Cutting: Non-standard dimensions or pre-txiav lengths incur more processing charges.
Quantity & Order Size: Kev txiav txim loj loj (tsheb thauj khoom lossis nkoj thauj khoom) feem ntau tau txais txiaj ntsig los ntawm kev txo nqi ntau dua piv rau cov khw muag khoom me me.
Certification & Testing: Kev txiav txim yuav tsum tau ntxiv 3.1 zeb daim ntawv pov thawj, kev kuaj tshwj xeeb, los yog traceability tshaj tus qauv EN 10025-2 yuav tsum tau ntxiv nqi.
5. Geopolitical & Macroeconomic Factors
Txoj Cai Kev Lag Luam & Cov Nqi Se: Ntshuam / Export lub luag haujlwm thiab kev lag luam tsis sib haum xeeb cuam tshuam ncaj qha rau cov nqi hauv cheeb tsam.
Txiaj Ntsig Tus Nqi: S275JR yog pauv thoob ntiaj teb. Ib qho txiaj ntsig hauv zos tsis muaj zog tiv thaiv US Dollar (uas cov khoom siv raw feem ntau raug nqi) nce nqi ntshuam.
Inflation & Economic Policy: General inflation thiab central bank paj paj cuam tshuam tag nrho cov nqi lag luam thiab kev nqis peev hauv steel-cov haujlwm hnyav.
6. Logistics & Qhov chaw
Cov Nqi Tsheb Thauj Mus Los: Qhov deb ntawm zeb mus rau cov neeg siv khoom, cov nqi roj, thiab cov khoom thauj khoom muaj feem cuam tshuam rau tus nqi xa khoom zaum kawg.
Cheeb Tsam / Lub Tebchaws: Cov nqi sib txawv ntawm thaj chaw (xws li EU, North America, Asia) vim muaj kev sib txawv ntawm kev lag luam hauv zos, tus nqi hluav taws xob, thiab kev lag luam.
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.
