Puas yog S235JR Mild Steel?
Yog lawm. S235JR yog cov hlau me me nyob rau hauv cov lus pom zoo engineering ntawm lo lus: nws yog ib qho tsis yog- alloy, qis- carbon structural steel nrog cov ntsiab lus siab tshaj plaws ntawm 0.17% rau cov thickness ntau tshaj plaws, uas tso rau hauv qis -carbon qeb. Lub sij hawm me me hlau yog siv xoob hauv kev lag luam, tab sis nws feem ntau txhais tau hais tias cov pa roj carbon steel nrog cov ntsiab lus qis, zoo ductility, yooj yim weldability thiab tsis txhob txwm ua alloying ntxiv. S235JR ua tau raws li tag nrho cov qauv no, thiab nws yog ib qho ntawm cov txheej txheem dav dav tshaj plaws nyob hauv Europe raws li EN 10025-2.
Lub npe qib tau nyeem raws li hauv qab no: S qhia cov qauv hlau, 235 yog qhov tsawg kawg nkaus tawm lub zog hauv megapascals rau tuab txog 16 hli, thiab JR yuav tsum muaj qhov cuam tshuam tsawg kawg nkaus ntawm 27 J ntawm 20 deg C. Daim ntawv square raj yog tsim rau hollow-section qauv EN 102102-19 (tuaj yeem ua tiav).
Tshuaj muaj pes tsawg leeg
Cov muaj pes tsawg leeg ntawm S235JR yog txhob txwm yooj yim thiab nruj me ntsis txwv:
| Element | Kev xav tau, % (t<= 40 mm) |
|---|---|
| Carbon (C), max | 0.17 |
| Manganese (Mn), max | 1.40 |
| Silicon (Si), max | 0.55 |
| Phosphorus (P), max | 0.035 |
| Sulfur (S), max | 0.035 |
| Nitrogen (N), max | 0.012 |
Cov ntsiab lus carbon tsawg muab S235JR zoo heev weldability, txias zoo -formability thiab zam txim rau tus cwj pwm hauv dabtsi yog khoov, txiav thiab drilling. Sulfur thiab phosphorus khaws cia qis kom cov hlau tseem tawv thiab tawg - tiv taus hauv cov qauv welded. Raws li ib tug me me hlau nws tsis muaj chromium, npib tsib xee los yog molybdenum ntxiv, yog li nws cov corrosion kuj yog tib yam li cov pa roj carbon zoo tib yam: txaus nyob rau hauv qhuav nyob rau hauv ib puag ncig, tab sis yuav tsum tau tiv thaiv txheej sab nraum zoov.
Mechanical Properties
| Khoom | Thickness<= 16 mm | Thickness 16 - 40 hli |
|---|---|---|
| Yam tsawg kawg yield zog | 235 MPa rau | 225 MPa |
| Tensile zog | 360 - 510 MPa | 360 - 510 MPa |
| Tsawg kawg elongation | 24 % | 23 % |
| Tsawg kawg cuam tshuam lub zog ntawm 20 ° C | 27 J | 27 J |
Cov txiaj ntsig no yog cov uas siv rau hauv kev tsim qauv. Lub elongation ntawm li 24% nyob rau hauv nyias seem lees paub qhov zoo ductility xav tau ntawm ib tug me me hlau, thiab 27 J kev cuam tshuam yuav tsum tau nyob rau hauv chav tsev kub tiv thaiv nkig tawg nyob rau hauv cov kev pab cuam zoo tib yam.
Yuav ua li cas S235JR Square Tube raug tsim
S235JR square raj pib li kub- dov strip, uas yog hlais mus rau qhov dav xav tau, yob- ua rau hauv cov square profile ntawm qhov kub thiab txias, thiab kaw los ntawm siab - zaus hluav taws xob- tsis kam vuam. Qhov chaw weld yog txiav sab hauv thiab tawm, lub raj yog qhov loj me thiab ncaj nraim mus rau chav kawm siab ntawm EN 10219-1, thiab nws raug txiav kom ntev. Qhov txias no - txoj kev sib sau thiab vuam ua rau lub raj muaj qhov ntev, lub ntsej muag du thiab kev tsim khoom lag luam. Kub-Tiav cov seem hollow rau EN 10210-1, tsim los ntawm qhov kub siab, kuj muaj nyob rau qhov uas tus qauv tsim yuav tsum muaj cov seem sib txawv me ntsis ntawm cov khoom kub tiav.
Txheej txheem txheej txheem
Txiav: sawing rau huv square xaus, los yog nplaim taws thiab plasma txiav rau cov seem loj, ua raws li deburring. Khoov: txias khoov rau hauv cov tswvcuab nkhaus nrog lub vojvoog khoov xaiv raws li qhov ntev ntawm sab thiab phab ntsa tuab kom tsis txhob muaj kaum sab xis; kub dabtsi yog khoov yog siv rau nruj radii. Vuam: S235JR welds yooj yim los ntawm arc thiab roj- cov txheej txheem tiv thaiv; vim nws yog cov hlau me me, preheat feem ntau tsis tsim nyog tshwj tsis yog rau cov ntu tuab heev lossis qhov ntsuas kub qis. Drilling thiab tapping: qhov thiab threads yog machined nrog tus qauv tooling; xaiv cov kev txwv txiav kom tsis txhob ua haujlwm- ua kom tawv tawv. Kev kho deg: sandblasting, kub-dip galvanizing lossis pleev xim yog siv rau qhov chaw sab nraum zoov lossis corrosive, vim tias cov hlau liab qab yuav tsis xeb.
Daim ntawv thov
Cov qauv hauv tsev: steel-cov tswv cuab, kab ke, lub ru tsev trusses, staircases thiab mezzanine txhawb nqa. Machinery manufacturing: khoom thav duab, conveyor kev txhawb nqa, guardrails thiab tsav-kab cov khoom. Cov chaw khiav tsheb: txoj kev guardrails, cov ntawv qhia, cov kab teeb pom kev zoo thiab cov tsheb kauj vab uas tau pleev xim los yog galvanized rau lub neej sab nraum zoov. Rooj tog thiab kho kom zoo nkauj: rooj thav duab, txee, tso saib cov qauv thiab cov ntsiab lus architectural, qhov twg square tube ua ke huv geometry nrog lub zog. General fabrication: jigs, trolleys, racks thiab ib ntus ua haujlwm uas pheej yig, weldable, xav tau steel.
Xaiv thiab tuav cov ntsiab lus
Paub meej txog qhov yuav tsum tau muaj sab ntev, phab ntsa tuab thiab ntev ntev tiv thaiv EN 10219-1 ua ntej xaj, thiab thov daim ntawv pov thawj EN 10204 3.1 zeb thaum xav tau kev taug qab. Rau kev siv sab nraum zoov, qhia kom meej galvanizing lossis cov xim ruaj khov thiab ua tib zoo saib xyuas cov npoo ntawm kev txiav, uas xeb ua ntej. Yog tias tus qauv yuav pom qhov kub thiab txias qis dua 20 ° C, xaiv S235J0 lossis S235J2 rau qhov ntsuas kub qis dua. Khaws lub raj tawm hauv av thiab hauv qab npog kom tsis txhob xeb xeb ua ntej fabrication.
Cov lus nug nquag
Puas yog S235JR tib yam li cov hlau me me?
Nyob rau hauv lub tswv yim yog muaj. S235JR yog ib qho tsis yog- alloy, qis- carbon structural steel nrog cov ntsiab lus siab tshaj plaws ntawm 0.17 %, uas yog raws li qeb kev lag luam hu ua hlau me. Lub npe EN tsuas yog ntxiv cov khoom muaj txiaj ntsig zoo thiab qhov yuav tsum tau muaj kev cuam tshuam uas lub sij hawm xoob me me tsis txhais.
S235JR square tube yog dab tsi?
Qhov tsawg kawg nkaus yield zog yog 235 MPa rau phab ntsa thickness mus txog 16 hli thiab 225 MPa rau 16 - 40 hli. Lub zog tensile yog 360 - 510 MPa.
S235JR puas tuaj yeem txuas tau yooj yim?
Yog, qhov no yog ib qho ntawm nws qhov zoo. Cov ntsiab lus tsis tshua muaj carbon tsawg thiab qis carbon sib npaug tso cai rau vuam los ntawm cov txheej txheem feem ntau yam tsis muaj preheat nyob rau hauv ib txwm seem. Rau cov phab ntsa tuab lossis qhov chaw txias heev, me me preheat tseem yog qhov kev coj ua zoo.
Puas yog S235JR xeb?
Yog lawm, zoo li txhua cov pa roj carbon steel nws xeb thaum raug ya raws thiab oxygen. Nws tsis muaj qhov tseem ceeb corrosion- tiv thaiv cov ntsiab lus alloy. Rau kev pabcuam sab nraum zoov nws yuav tsum tau pleev xim rau, galvanized lossis lwm yam coated; daim ntawv galvanized yog feem ntau rau cov rooj tog hauv kev thiab cov qauv.
Qhov txawv ntawm S235JR thiab S275JR yog dab tsi?
Ob leeg tsis yog - alloy structural steels hauv EN 10025-2. S275JR muaj lub zog qis dua qis dua (275 MPa) thiab lub zog tensile siab dua me ntsis (410 - 560 MPa), ua tiav nrog cov ntsiab lus siab dua me ntsis carbon thiab manganese. S235JR yog pheej yig dua, softer thiab txawm yooj yim rau daim ntawv; qhov kev xaiv yog tsav los ntawm tus tsim load.
Puas yog S235JR square raj muaj nyob rau hauv kub - daim ntawv tiav?
Yog lawm. Kub-Tiav square hollow seem tau muab rau EN 10210-1, thaum lub caij txias- tsim cov khoom welded raws li EN 10219-1. Cov ntu kub-tiav muaj qhov sib txawv ntawm cov kaum sab xis thiab cov khoom sib txawv me ntsis, thiab qhov kev xaiv ntawm ob yog ib txwm hais los ntawm cov qauv tsim.