S355JR Steel Tube yog dab tsi?
S355JR yog ib qho qis- alloy, siab - lub zog steel qauv tau teev tseg hauv EN 10025-2. Nyob rau hauv lub npe qib, S txhais tau hais tias cov qauv hlau, 355 yog qhov tsawg kawg nkaus yield zog nyob rau hauv megapascals, thiab JR yuav tsum tau ib tug tsawg kawg nkaus Charpy cuam tshuam lub zog ntawm 27 J ntawm 20 deg C. Thaum cov hlau yog tsim rau hauv lub raj, nws yog muab raws li square los yog square hollow seem ib EN 10210-1 (kub 12 daim ntawv los yog EN 19 roundcold) raj rau kev siv cov qauv thiab txhua yam.
S355JR tuav lub zog tier feem ntau xaiv rau cov qauv nruab nrab thiab hnyav: kwv yees li 30% muaj zog dua S235JR thiab 15% muaj zog dua S275JR, thaum tseem tshuav ib qho weldable, formable thiab economical non{5}} alloy steel. Tus ntoo khaub lig li niaj zaus- ntu ntawm lub raj square ua kom yooj yim rau kev sib txuas tsim, thiab ntu qhov hollow muab lub zog siab - rau - qhov hnyav piv uas txo cov neeg tuag hauv cov thav duab thiab trusses.
Tshuaj muaj pes tsawg leeg thiab cov yam ntxwv ntawm cov khoom
Cov muaj pes tsawg leeg ntawm S355JR yog tsim los rau kev ruaj khov thiab kev coj tus cwj pwm zoo:
| Element | Kev xav tau, % (t<= 40 mm) |
|---|---|
| Carbon (C), max | 0.24 |
| Silicon (Si), max | 0.55 |
| Manganese (Mn), max | 1.60 |
| Phosphorus (P), max | 0.035 |
| Sulfur (S), max | 0.035 |
| Nitrogen (N), max | 0.012 |
Cov pa roj carbon thiab manganese yog cov ntsiab lus ntxiv dag zog; silicon txhim kho lub zog thiab pab deoxidation; phosphorus, sulfur thiab nitrogen yog nruj me ntsis txwv kom khaws toughness thiab weld zoo. Cov kab tooj liab tuaj yeem muaj. Cov hlau yog tsim los ntawm converter los yog hluav taws xob -arc rauv steelmaking raws li ib tug tag nrho tua steel, uas muab ib tug ntom, homogeneous microstructure thiab ruaj khov mechanical nqi ntawm tshav kub mus rau tshav kub.
Mechanical Properties
| Khoom | Thickness<= 16 mm | Thickness 16 - 40 hli | Thickness 40 - 63 hli |
|---|---|---|---|
| Yam tsawg kawg yield zog | 355 MPa rau | 345 MPa rau | 335 MPa rau |
| Tensile zog | 470 - 630 MPa | 470 - 630 MPa | 470 - 630 MPa |
| Tsawg kawg elongation | 22 % | 21 % | 20 % |
| Tsawg kawg cuam tshuam lub zog ntawm 20 ° C | 27 J | 27 J | 27 J |
Lub zog tawm los siab ua kom cov ntu thiab qhov hnyav poob qis hauv kev thauj khoom, thaum lub sijhawm 470 - 630 MPa tensile ntau thiab cov txiaj ntsig elongation muab ductility thiab tawg tsis kam. Cov qib kuj qhia tau hais tias muaj qee qhov kev cuam tshuam ntawm kev puas tsuaj nyob rau hauv ib puag ncig abrasive, txawm hais tias nws tsis yog abrasion-cov hlau resistant thiab yuav tsum tsis txhob muab teev ua ib qho.
Yam ntxwv ntawm S355JR Hollow Sections
Qhov sib npaug ntawm lub zog thiab lub zog: kev sib xyaw ua ke ntawm 355 MPa yield nrog zoo elongation ua rau lub raj tsim nyog rau kev thauj khoom thiab kev cuam tshuam - cov qauv yooj yim xws li crane txhawb nqa thiab tshuab thav duab. Weldability zoo: qhov qis carbon sib npaug ntawm qib ua kom tawg rhiab heev, yog li S355JR tuaj yeem welded los ntawm cov txheej txheem txheej txheem hauv feem ntau yam tsis muaj kev ntsuas tshwj xeeb. Huab cua tsis kam: piv nrog cov qis qis - carbon steel nws atmospheric corrosion cwj pwm yog marginally zoo dua, tab sis nws tsis yog ib tug weathering hlau; siv sab nraum zoov tseem yuav tsum tau pleev xim lossis galvanizing. Dimensional stability: lub hollow seem resists torsional thiab lateral buckling zoo dua qhib profiles ntawm tib qhov hnyav, uas yog vim li cas nws thiaj li nyiam rau compression cov tswv cuab thiab qhov chaw thav ntawv.
Txawm li cas los xij, qib tsis yog khoom kim heev. Hauv qhov tsis tshua muaj siab - qhov kev pabcuam kub, lossis nyob rau hauv qhov chaw uas muaj corrosive, qib siab dua (S355J2 rau -20 deg C cuam tshuam, lossis cov khoom tsis muaj xim lossis coated) lossis kev tiv thaiv ntxiv yuav tsim nyog.
Daim ntawv thov
Lub tsev tsim: lub Hoobkas kab thiab kab teeb, stair rails, canopy thav duab, exhibition halls thiab chaw ntau pob chaw thav ntawv, qhov twg load peev xwm thiab huv si geometry teeb meem. Mechanical manufacturing: cov khoom siv thav duab, kev txhawb nqa conveyor, cov qauv gantry thiab lub hauv paus tshuab uas yuav tsum nqa dynamic loads. Cov choj thiab kev tsim kho vaj tsev: cov tswv cuab theem nrab, gantries thiab cov yees, xaiv los ntawm kev tswj hwm tus qauv tsim. Cov khoom siv mining thiab metallurgical: chutes, kev txhawb nqa thiab platforms raug cuam tshuam thiab puas. Shipbuilding: lawj qauv thiab stiffeners qhov twg cov ntaub ntawv pov thawj yuav tsum tau.
Xaiv thiab Tsim Cov Ntsiab Lus
Cov ntawv thov sib txawv muab qhov xav tau sib txawv ntawm qhov loj thiab phab ntsa tuab, yog li cov seem yuav tsum tau xaiv los ntawm qhov project tsim, tsis yog kwv yees: ib lub teeb railing siv lub nyias phab ntsa thaum lub pob hnyav hnyav siv phab ntsa tuab. Paub meej txog qhov cuam tshuam- ntsuas kub: JR lav 27 J ntawm 20 deg C nkaus xwb, yog li rau qhov chaw txias txias qhia J0 (0 deg C) lossis J2 (-20 deg C). Rau welded kev sib txuas hauv cov ntu tuab, siv cov txheej txheem vuam tsim nyog nrog kev tswj cov cua sov thiab, qhov xav tau, preheat. Txheeb xyuas qhov kam rau ua rau EN 10219-1 lossis EN 10210-1 thiab thov daim ntawv pov thawj zeb rau cov qauv ntawv pov thawj.
Cov lus nug nquag
Lub zog tawm ntawm S355JR raj yog dab tsi?
Qhov tsawg kawg nkaus yield zog yog 355 MPa rau thickness txog 16 hli, 345 MPa rau 16 - 40 hli thiab 335 MPa rau 40 - 63 hli. Lub npe qib yog hais txog tus nqi 355 MPa.
Lub zog tensile ntawm S355JR yog dab tsi?
Lub zog tensile ntau yog 470 - 630 MPa hla cov tuab tuab, nrog qhov tsawg kawg nkaus elongation ntawm 22% rau cov ntu nyias. Qhov no yog qhov pom tau tias siab dua S275JR (410 - 560 MPa), uas yog vim li cas S355JR siv rau qhov hnyav dua.
Puas yog S355JR haum rau vuam?
Yog lawm. Cov pa roj carbon sib npaug yog tsawg txaus rau kev vuam ib txwm tsis muaj preheat nyob rau hauv feem ntau, thiab qib yog ib qho ntawm cov feem ntau welded steels nyob rau hauv cov teb chaws Europe. Rau cov phab ntsa tuab, qhov kub thiab txias ambient los yog siab ceev, cov txheej txheem tsim nyog nrog nruab nrab preheat yog pom zoo.
S355JR puas tuaj yeem siv rau qhov kub thiab txias?
JR suffix guarantees cuam tshuam lub zog tsuas yog nyob rau ntawm 20 deg C. Rau cov kev pab cuam hauv qab no hais tias S355J0 (kuaj ntawm 0 deg C) los yog S355J2 (kuaj ntawm -20 deg C). Cov lej tsim qauv kuj tseem ua rau lawv tus kheej cov cai ntsuas qhov kub thiab txias ntawm JR qib.
Puas yog S355JR yog huab cua hlau?
Tsis yog. Nws yog cov qauv carbon-manganese steel. Nws tsis txhob txwm tshaj tawm corrosion- tawm tsam qhov sib ntxiv dhau ntawm cov kab tooj liab, thiab nws yuav tsum tau coated rau sab nraum zoov. Rau qhov tsis tau pleev xim rau huab cua- kev pabcuam corrosion, yuav tsum muaj qib huab cua.
Dab tsi yog qhov txawv ntawm S355JR square raj thiab round raj?
Square tube (SHS) muaj qhov sib npaug sib npaug ntawm qhov sib npaug ntawm ob txoj kab nruab nrab thiab lub ntsej muag tiaj tus uas ua kom yooj yim rau cov pob qij txha, ua rau nws zoo tagnrho rau txhua kab, thav ntawv thiab kev ua haujlwm vaj tsev. Round raj muaj cov khoom sib xws hauv txhua qhov kev taw qhia radial thiab nyiam rau truss chords, conveyors thiab rotating lug. Ob leeg tuaj yeem tsim los ntawm S355JR rau tib tus qauv EN.