S355J0 yog tus qauv European (EN 10025-}2) tsis yog- alloy structural steel, paub txog nws qhov tsawg kawg nkaus yield zog ntawm 355 MPa, zoo weldability, thiab toughness ntawm 0 degree, qhia los ntawm 'J0' (0℃cuam tshuam kuaj). Nws yog cov hlau tsis tshua muaj manganese steel, tsim nyog rau kev tsim kho dav dav, txuas hniav, thiab tshuab hauv cov huab cua me me, feem ntau muab cov khoom qub lossis tsis kho, thiab zoo ib yam li ASTM A572 Qib 50.
Cov yam ntxwv tseem ceeb:
Lub zog:Yam tsawg kawg yield zog ntawm 355 MPa.
Impact Resistance:Kev sim muab yam tsawg kawg 27 Joules ntawm 0℃(qhia los ntawm 'J0').
Kev sib xyaw:Tsawg carbon (max 0.20%) thiab manganese cov ntsiab lus, ua rau nws yooj yim weldable.
Qhov xwm txheej:Feem ntau muab cov normalized los yog tsis kho kom zoo machinability thiab formability.
Daim ntawv thov:
General kev tsim kho thiab structural engineering.
Cov choj, nkoj, thiab cov khoom siv fais fab.
Lifting thiab thauj machinery.
Cov qauv uas yuav tsum tau ua kom zoo weldability thiab lub zog me me (siab dua 0 degree) cov xwm txheej.
Sib npaug:
ASTM A572 Qib 50
TSW 52-3
SIB SM490
Cov tshuaj muaj pes tsawg leeg ntawm steel S355J0 (1.0553): EN 10025-2-2004
| Nominal thickness =< 40(mm) C max=0.20 Nominal thickness =< 30(mm) CEVmax=0.45 |
| C | Si | Mn | P | S | N | Cu | CEV |
| max 0.22 | max 0.55 Nws | max 1.6 hli | max 0.035 Nws | max 0.035 Nws | max 0.012 | max 0.55 Nws | max 0.47 Nws |
Qhov no yog ib lo lus nug zoo heev thiab muaj ntau heev nyob rau hauv structural engineering thiab steel procurement. Cov lus teb luv luv yog:
Yog lawm, S355J0 feem ntau suav hais tias yog qhov ze tshaj plaws nyob sab Europe sib npaug rau ASTM A572 Qib 50, thiab lawv feem ntau siv sib hloov hauv cov haujlwm thoob ntiaj teb, tab sis lawv tsis zoo ib yam.
Nov yog cov ncauj lus kom ntxaws sib piv ntawm qhov tseem ceeb zoo sib xws thiab qhov sib txawv:
Core Similarities (Vim li cas lawv thiaj suav tias sib npaug)
Lub zog tseem ceeb Metric: Ob leeg yog siab -lub zog qis- alloy (HSLA) cov qauv hlau.
Yield Strength: Lawv qhov tsawg kawg nkaus tawm lub zog yog qhov tseem ceeb tib yam.
A572 Gr. 50: 50 ksi=345 MPa
S355J0: 355 MPa
Qhov sib txawv ntawm 10 MPa yog qhov tsis txaus ntseeg nyob rau hauv feem ntau cov ntsiab lus tsim thiab yog nyob rau hauv ib txwm kam rau ua.
Tensile Strength: Lawv lub zog tensile sib tshooj ntau heev.
A572 Gr. 50: 65 ksi min. (~ 450 MPa)
S355J0: 470-630 MPa (rau thicknesses Tsawg dua los yog sib npaug rau 16 hli)
Daim Ntawv Thov: Ob leeg yog cov neeg ua haujlwm rau cov txuas hniav, cov tsev, cov tsev sib kis, thiab cov khoom siv hnyav.
Yuav ua li cas qhia qhov sib npaug tiag
Yog tias koj xav tau hla -qhia, koj yuav tsum sib phim txhua yam tseem ceeb, tsis yog lub zog tawm los xwb.
Txhawm rau hloov A572 Gr. 50 nrog European steel:
Koj xav tau S355J0 (los yog feem ntau S355J2 rau ntau dua -20℃toughness) los ntawm cov qauv khoom raug:
Daim Hlau / Ntawv: EN 10025-2
Kub-cov qauv ua tiav (piv txwv li, H-beams): EN 10210-1: S355J2H
Txias-tsim hollow seem: EN 10219-1
Txhawm rau hloov S355J0 nrog American steel:
Koj yuav qhia ASTM A572 Qib 50 PLUS qhov kev xav tau ntxiv rau Charpy V-kev ntsuas qhov cuam tshuam ntawm 32℃F (0 degree) nrog qhov tsawg kawg nkaus ntawm 20 ft-lbf (≈27 J) kom phim cov khoom J0.
Xaus
Rau lub hom phiaj dav dav uas tsuas yog tawm los thiab lub zog tensile yog tswj hwm, S355J0 thiab A572 Gr. 50 yog qhov sib npaug thiab hloov tsis tu ncua.
Rau cov ntawv thov uas tawg toughness, weldability, los yog tej fabrication yog ib qho tseem ceeb, qhov yuav tsum tau toughness ntawm S355J0 yog ib tug tseem ceeb kom zoo dua lub neej ntawd A572 Gr. 50. Ib txwm xyuas kom meej tias tag nrho cov uas yuav tsum tau muaj nyob rau hauv tus tsim specification yog ua tau raws li cov ntaub ntawv thov.
Nco ntsoov sab laj nrog txoj haujlwm tswj hwm txoj cai (xws li AISC hauv Asmeskas, Eurocode hauv EU) thiab tus kws tsim qauv ua ntej yuav hloov cov khoom siv.
1. S355J0 steel yog dab tsi?
S355J0 yog ib qho uas tsis yog- alloy structural steel qib ib EN 10025-2, nrog rau qhov tsawg kawg nkaus lub zog ntawm 355 MPa thiab lav qhov cuam tshuam toughness ntawm 0℃.
2. Qhov 'J0' hauv S355J0 txhais li cas?
Lub 'J0' qhia tias Charpy V- qhov ntsuas qhov cuam tshuam ntawm 0 degree, ua kom lub zog nqus tsawg kawg ntawm 27 Joules rau kev ua tau zoo hauv cov mob khaub thuas.
3. Cov ntawv thov tseem ceeb ntawm S355J0 yog dab tsi?
Nws yog feem ntau siv hauv cov txuas hniav, cov qauv hauv ntug dej hiav txwv, cov thav duab hauv tsev, thiab cov tshuab hnyav hauv cov huab cua sov uas qhov kub yuav poob mus rau khov.
4. Qhov txawv ntawm S355JR thiab S355J0 yog dab tsi?
S355JR raug kuaj xyuas ntawm +20 degree, thaum S355J0 raug kuaj ntawm 0 degree, ua J0 haum rau cov ntawv thov raug rau ze - khov.
5. Lub zog tawm ntawm S355J0 yog dab tsi?
Qhov tsawg kawg nkaus tawm lub zog yog 355 MPa rau thicknesses txog li 16 hli, nrog txo qhov nqi rau cov seem tuab rau EN 10025-2.
6. S355J0 puas tuaj yeem welded?
Yog lawm, S355J0 muaj qhov zoo weldability, tab sis cov txheej txheem tsim nyog - suav nrog kev ua kom muaj peev xwm ua ntej rau cov ntu tuab lossis ib puag ncig txias - yuav tsum ua raws.
7. Puas yog S355J0 sib npaug rau ASTM A572 Qib 50?
Tsis ncaj. Thaum lub zog zoo sib xws, S355J0 suav nrog qhov yuav tsum tau ua kom muaj zog ntawm 0 degree, uas tsis tas yuav tsum muaj nyob rau hauv tus qauv A572 Qib 50.
8. Cov tshuaj muaj pes tsawg leeg ntawm S355J0 yog dab tsi?
Nws feem ntau muaj max 0.24% Carbon, max 1.60% Manganese, thiab tswj phosphorus / sulfur (piv txwv li, P Tsawg dua lossis sib npaug rau 0.035%, S Tsawg dua lossis sib npaug li 0.035%).
9. Puas yog S355J0 corrosion resistant?
Tsis yog, nws tsis yog corrosion-resistant thiab yuav tsum tau muaj kev tiv thaiv txheej xws li pleev xim los yog galvanizing rau sab nraum zoov siv.
10. S355J0 piv rau S355J2 li cas?
S355J0 raug kuaj ntawm 0 degree, thaum S355J2 raug kuaj ntawm -20 degree, ua J2 haum rau qhov chaw txias dua (sub-zero) ib puag ncig.
11. Dab tsi yog cov khoom siv kho tshuab ntawm S355J0?
Cov khoom tseem ceeb muaj xws li yield zog Ntau dua lossis sib npaug rau 355 MPa (t Tsawg dua lossis sib npaug li 16mm), tensile zog 470-630 MPa, elongation Ntau dua lossis sib npaug li 20-22%, thiab 27J cuam tshuam lub zog ntawm 0 degree.
12. Puas yog S355J0 haum rau qis- kev pabcuam kub hauv qab 0 degree?
Tsis yog, S355J0 tau ntawv pov thawj tsuas yog rau 0 degree. Rau cov kev pabcuam ruaj khov hauv qab khov, qib zoo li S355J2 (-20 degree) lossis S355K2 (-20℃nrog lub zog siab dua) yuav tsum tau siv.
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.
