BS 4360 Qib 43 steel yog cov khoom siv lees paub rau kev tsim Longitudinal Submerged Arc Welded (LSAW) kav. Kev sib xyaw ua ke no feem ntau yog siv rau kev siv cov qauv kev thauj mus los thiab cov kua dej, tshwj xeeb hauv cov cheeb tsam lossis cov haujlwm ua raws li Cov Qauv Askiv.
Ntawm no yog cov ncauj lus kom ntxaws specification rau BS 4360 Qib 43 LSAW yeeb nkab.
Cov ntsiab lus tseem ceeb
| Yam ntxwv | Kev piav qhia |
|---|---|
| Txuj | SIB 4360: Tam sim no - thim British Standard specification rau weldable structural steels . Nws tau raug hloov los ntawm cov qauv European (EN 10025). |
| Qib | Qib 43: Cov qib carbon steel ntau nyob rau hauv BS 4360 tus qauv, ntxiv muab faib ua sub-qib xws li 43A, 43B, 43C, thiab 43D raws li qhov yuav tsum tau ua rau kev xeem. |
| Txheej txheem | LSAW (Longitudinal Submerged Arc Vuam): Cov kav dej yog tsim los ntawm kev tsim cov hlau phaj rau hauv lub tog raj kheej (siv JCOE lossis UOE thev naus laus zis) thiab vuam cov seam ntev ob sab hauv thiab sab nraud siv cov txheej txheem submerged arc. |
| Chemical Composition (Qib 43A, max %) | |
| Cov pa roj carbon (C): 0.25 | |
| Manganese (Mn): 1.60 | |
| Phosphorus (P): 0.05 | |
| Sulfur (S): 0.06 | |
| Silicon (Si): 0.50 | |
| Mechanical Properties (Qib 43) | |
| Yield zog:275 MPa (40 ksi) yam tsawg kawg nkaus | |
| Tensile zog:430-580 MPa (63-84 ksi) ntau | |
| Elongation:Nws txawv ntawm thickness; feem ntau 20-22% | |
| Hom Loj Loj | |
| Sab nraud txoj kab uas hla:16 "mus rau 72" (406mm txog 1820mm) | |
| Phab ntsa Thickness:6.0mm txog 60mm (nyob ntawm txoj kab uas hla thiab qib zog) | |
| Cov kauj ruam tsim khoom | 1. steel phaj xaiv thiab ntug milling. 2. Phaj ntug crimping. 3. Kev tsim siv JCOE lossis UOE cov txheej txheem. 4. Sab hauv thiab sab nraud submerged arc vuam. 5. Mechanical expansion. 6. Tsis yog- kuaj kev puas tsuaj (Ultrasonic, X-ray). 7. Kev ntsuam xyuas hydrostatic. 8. Xaus ntsej muag thiab beveling. |
| Cov ntawv thov siv | General structural engineering; piling rau lub hauv paus; dej, roj, thiab roj kis tau tus mob (tsis tshua muaj siab); tej yaam num offshore; kev tsim kho choj. |
Nkag siab BS 4360 Qib 43
BS 4360 yog ib qho kev qhia dav dav hauv tebchaws Askiv rau cov qauv hlau. Hauv nws,Qib 43hais txog cov hlau uas muaj qhov tsawg kawg nkaus yield zog ntawm275 MPa rau(rau thickness txog li 16 hli). Qhov no ua rau nws roughly sib npaug rau niaj hnubEN 10025 S275hlau.
Tsab ntawv suffix qhia txog qib uas yuav tsum tau muaj kev cuam tshuam toughness:
Qib 43A:Tsis muaj cov kev cai cuam tshuam.
Qib 43B:Tshwj xeeb cuam tshuam lub zog ntawm chav tsev kub (20 degree).
Qib 43C:Kev cuam tshuam lub zog ntawm 0 degree.
Qib 43D:Tshwj xeeb cuam tshuam lub zog ntawm -20 degree.
Cov ntawv thov siv
BS 4360 Qib 43 LSAW kav yog siv rau hauv cov ntawv thov uas yuav tsum muaj kev ntseeg siab, nruab nrab - lub zog carbon steel yeeb nkab yuav tsum:
Cov yam ntxwv ntawm tus qauv:Lub tsev thav duab, choj girders, thiab dav fabrication.
Piling:Lub hauv paus pawg rau cov tsev thiab infrastructure (nrog qhov ntau thiab tsawg mus txog 63 "OD).
Kev thauj kua dej:Tsawg-siab xa dej, roj, thiab roj .
Marine thiab Offshore:Cov phiaj xwm xav tau kev tsim kho steel hlau.
Cov xwm txheej ntawm tus qauv
Nws yog ib qho tseem ceeb kom nco ntsoov tiasBS 4360 tau raug tshem tawmthiab hloov los ntawm cov txheej txheem European, feem ntauTS EN 10025rau kub-rolled structural steel. Qhov sib npaug niaj hnub ntawm BS 4360 Qib 43 feem ntau yogEN 10025 S275. Yog li, rau cov haujlwm tshiab lossis cov uas xav tau cov qauv tam sim no, S275 steel (feem ntau hauv LSAW kav rau cov qauv zoo liTS EN 10219) yuav tau teev tseg. Txawm li cas los xij, BS 4360 Qib 43 tseem tab tom ntsib hauv cov phiaj xwm qub txeeg qub teg, kev saib xyuas kev ua haujlwm, lossis hauv cov lus qhia tshwj xeeb los ntawm cov tuam txhab lag luam uas txuas ntxiv sau nws rau kev paub txog kev lag luam.
