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
Ntawm no yog cov ntsiab lus tseem ceeb ntawm cov khoom siv hluav taws xob ntawm S355J0 cov qauv hlau raws li European tus qauv EN 10025-2: 2004.Cov no yog qhov tsawg kawg nkaus lav qhov tseem ceeb siv rau kev tsim. Cov ntawv pov thawj tseeb los ntawm steel mills feem ntau yuav tshaj tawm cov nqi siab dua.
1. Cov cuab yeej tseem ceeb (Core Table)
Cov khoom tseem ceeb tshaj plaws -yield zog, tensile zog, thiab elongation-nyob ntawm cov khoom thickness.
| Khoom Thickness, * t * (mm) | Yield zog, ReH (min.) MPa | Tensile zog, Rm MPa | Elongation, A (min.) %(Longitudinal) |
|---|---|---|---|
| t Tsawg dua los yog sib npaug rau 16 | 355 | 470 - 630 | 21 |
| 16 |
345 | 470 - 630 | 21 |
| 40 |
335 | 470 - 630 | 21 |
| 63 |
325 | 470 - 630 | 20 |
| 80 |
315 | 470 - 630 | 20 |
| 100 |
295 | 450 - 600 | 19 |
| 150 |
285 | 450 - 600 | 19 |
(Rau cov khoom ntev xws li kab teeb, cov thickness cuam tshuam yog lub nominal thickness ntawm flange.)
2. Impact Toughness (Lub "J0" Property)
Qhov no yog qhov yuav tsum tau muaj rau S355J0.
Kuaj: Charpy V-qhov ntsuas qhov cuam tshuam.
Kev ntsuas kub: 0 degree
Qhov nruab nrab qhov cuam tshuam tsawg kawg nkaus: 27 Joules
Txoj Cai: Qhov nruab nrab ntawm 3 qhov kev xeem yuav tsum muaj ntau dua lossis sib npaug rau 27 J, tsis muaj ib qho kev xeem tau qis dua 70% ntawm tus nqi no (piv txwv li, Ntau dua lossis sib npaug rau 19 J).
3. Lwm yam tseem ceeb Mechanical & Tech Properties
| Khoom | Hom Tus Nqi / Xav Tau | Nco tseg |
|---|---|---|
| Modulus ntawm Elasticity (Young's Modulus) | ~ 210,000 MPa (210 GPa) | Txheem tus nqi rau steel, assumed nyob rau hauv tsim. |
| Shear Modulus | ~ 81,000 MPa (81 GPa) | Txheem tus nqi rau steel. |
| Poisson tus ratio | ~0.3 | Txheem tus nqi rau steel. |
| Qhov ntom | 7850 kg/m³ | |
| Khoov Test | Yuav tsum hla tsis muaj cracking. | Sab hauv khoov vojvoog nyob ntawm thickness thiab qib zoo. |
Cov ntsiab lus rau Engineers & Designers:
Thaum ua haujlwm nrogS355J0:
Ib txwm siv lub zog tawm los sib xws rau koj cov khoom tshwj xeeb thickness ntawm cov lus saum toj no.
Nco ntsoov tias nws tau lees paub, kuaj qhov tawv ntawm 0℃(27 J min.), uas yog qhov tseem ceeb ntawm qee qhov "sib npaug" qib xws li ASTM A572 Gr. 50 qhov uas tsis yog qhov yuav tsum tau ua.
Nws yog ib qho yooj yim weldable steel, tab sis cov txheej txheem vuam (tshwj xeeb tshaj yog preheat rau cov seem tuab) yuav tsum yog raws li nws qhov tseeb CEV thiab thickness.
Rau cov qauv tsim, ib txwm thov thiab xa mus rau daim ntawv pov thawj zeb xeem rau cov khoom tshwj xeeb, raws li nws yuav teev covqhov tseebntsuas cov khoom, uas feem ntau siab dua li qhov tsawg kawg nkaus.
Qhov kev sib xyaw ua ke ntawm lub zog, lav qhov toughness, thiab zoo weldability ua rau S355J0 yog ib qho ntawm cov khoom siv dav siv nyob hauv Europe thiab thoob ntiaj teb.
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.
