S355JR yog qhov siab - lub zog, qis- carbon structural steel qib (EN 10025) paub txog nws qhov zoo weldability thiab toughness, nrog "S" rau structural, "355" rau nws qhov tsawg kawg nkaus 355 MPa yield zog, thiab "JR" qhia tias nws dhau los ntawm chav tsev 2 ntawm Charpy (2 degree) nqus. Nws tau siv dav hauv kev tsim kho, txuas hniav, tshuab hnyav, thiab kev tsim nkoj rau kev thauj khoom -cov kabmob uas xav tau lub zog thiab ua haujlwm ntev.
Cov yam ntxwv tseem ceeb
Lub zog:Siab tensile thiab yield zog (Ntau dua los yog sib npaug rau 355 MPa).
Weldability:Zoo heev, vim muaj cov ntsiab lus carbon tsawg, ua rau nws yooj yim rau vuam.
Toughness:Kev cuam tshuam zoo, lav los ntawm kev xeem "JR".
Kev faib tawm:Tsis yog- alloy, kub- dov structural steel.
Kev tawg ntawm lub npe
S:Cov qauv hlau.
355:Yam tsawg kawg nkaus Yield Strength nyob rau hauv MPa (rau thicknesses tsawg dua los yog sib npaug rau 16 hli).
JR:Qhov tshwm sim ntawm Charpy impact test (27 Joules ntawm +20℃).
Lub zog tawm los ntawm S355JR yog dab tsi?
Qhov tsawg kawg nkaus yield zog (ReH) ntawm S355JR yog 355 megapascals (MPa) rau cov khoom siv feem ntau cov ntaub ntawv nrog ib tug nominal thickness Tsawg dua los yog sib npaug rau 16 hli.
Cov Lus Qhia Tshwj Xeeb Tseem Ceeb (EN 10025-2):
Qhov no yam tsawg kawg nkaus yield zog tus nqitxo qis rau cov khoom tuab, raws li standardized rau cov qauv steels account rau manufacturing variations. Cov nqi tiag tiag yog:
Rau nominal thickness Tsawg dua los yog sib npaug rau 16 hli: 355 MPa rau
>16mm txog 40mm: 345 MPa rau
>40mm txog 63mm: 335 MPa rau
>63mm txog 80mm: 325 MPa
>80mm txog 100mm: 315 MPa rau
Hauv cov ntsiab lus:Thaum S355JR raug cais los ntawm nws qhov tsawg kawg nkaus 355 MPa lub zog tawm los, qhov tseeb tus nqi no tau lees paub tsuas yog rau ntu txog li 16 hli tuab. Rau kev tsim thiab kev suav engineering, nws yog ib qho tseem ceeb uas yuav tsum tau siv cov txiaj ntsig lub zog muaj txiaj ntsig sib xws rau cov khoom siv tiag tiag raws li cov lus teev saum toj no.
Kwv yees imperial sib npaug: 355 MPa ≈ 51,500 psi (rau thickness Tsawg dua lossis sib npaug li 16 hli).
Cov tshuaj muaj pes tsawg leeg ntawm steel S355JR (1.0045): EN 10025-2-2004
| Nominal thickness =< 30(mm) CEVmax=0.45 |
| C | Si | Mn | P | S | N | Cu | CEV |
| max 0.24 | max 0.55 Nws | max 1.6 hli | max 0.04 Nws | max 0.04 Nws | max 0.012 | max 0.55 Nws | max 0.47 Nws |
Mechanical zog ntawm steel S355JR (1.0045)
| Nominal thickness (hli): | rau 3 | 3 - 100 | 100 - 150 | 150 - 250 |
| Rm- Tensile zog (MPa) Flat thiab ntev khoom | 510-680 | 470-630 | 450-600 | 450-600 |
| Nominal thickness (hli): | rau 16 | 16 - 40 | 40 - 63 | 63 - 80 | 80 - 100 | 100 - 150 | 150 - 200 | 200 - 250 |
| ReH- Yam tsawg kawg nkaus yield zog (MPa) Flat thiab ntev khoom | 355 | 345 | 335 | 325 | 315 | 295 | 285 | 275 |
| KV- Impact zog (J) longitud., | -20 degree 27 |
0 degree 27 |
+20 degree 27 |
| Nominal thickness (hli): | rau 1 | 1 - 1.5 | 1.5 - 2 | 2 - 2.5 | 2.5 - 3 |
| A- Min. elongation Lo=80 hli (%) parallel, | 14 | 15 | 16 | 17 | 18 |
| Nominal thickness (hli): | 3 - 40 | 40 - 63 | 63 - 100 | 100 - 150 | 150 - 250 |
| A- Min. elongation Lo=5,65 √ Yog li (%) parallel, | 22 | 21 | 20 | 18 | 17 |
1. S355JR steel yog dab tsi?
S355JR yog ib qho uas tsis yog- alloy structural steel qib ib EN 10025-2, nrog rau qhov tsawg kawg nkaus yield zog ntawm 355 MPa thiab lav qhov cuam tshuam toughness ntawm chav tsev kub (+20℃).
2. Lub zog tawm ntawm S355JR yog dab tsi?
Qhov tsawg kawg nkaus yield zog ntawm S355JR yog 355 MPa rau nominal thickness mus txog 16 hli, txo rau thicker seem raws li EN 10025-2.
3. 'JR' hauv S355JR txhais li cas?
Lub 'JR' qhia tias Charpy V- ntsuas qhov cuam tshuam ntawm +20 degree, kom ntseeg tau qhov tsawg kawg nkaus absorbed zog ntawm 27 Joules rau qhov yooj yim toughness.
4. Puas yog S355JR sib npaug rau ASTM A572 Qib 50?
Tsis raws nraim. Txawm hais tias ob qho tib si muaj lub zog zoo sib xws (~ 345 MPa rau A572 Gr 50 vs . 355 MPa rau S355JR), lawv muaj cov qauv sib txawv thiab muaj cov tshuaj sib txawv thiab cov kev xeem.
5. Cov ntawv thov tseem ceeb ntawm S355JR yog dab tsi?
Nws yog dav siv hauv kev tsim kho hnyav, txuas hniav, cov tsev lag luam, cranes, machinery thav duab, thiab cov qauv sab nrauv uas xav tau lub zog siab dua S275 qib.
6. Qhov txawv ntawm S355JR thiab S355J2 yog dab tsi?
S355JR raug kuaj ntawm +20 degree, thaum S355J2 raug kuaj ntawm -20 degree, ua J2 haum rau kev siv huab cua txias.
7. S355JR puas tuaj yeem welded?
Yog lawm, S355JR muaj qhov zoo weldability siv cov kev sib txawv, txawm hais tias preheating yuav tsum tau rau cov seem tuab lossis cov kev pabcuam nruj.
8. Cov tshuaj muaj pes tsawg leeg ntawm S355JR yog dab tsi?
Cov muaj pes tsawg leeg muaj xws li 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 S355JR corrosion resistant?
Tsis yog, nws tsis yog corrosion-resistant. Kev tiv thaiv txheej xws li pleev xim lossis galvanizing yog tsim nyog rau qhov chaw sab nraum zoov lossis corrosive.
10. Qhov txawv ntawm S355JR thiab S275JR yog dab tsi?
Qhov sib txawv tseem ceeb yog lub zog: S355JR muaj lub zog qis dua qhov qis dua (355 MPa vs . 275 MPa), tso cai rau cov qauv sib dua lossis muaj zog dua.
11. Dab tsi yog cov khoom siv kho tshuab ntawm S355JR?
Cov khoom tseem ceeb muaj xws li yield zog Ntau tshaj los yog sib npaug rau 355 MPa (t Tsawg dua los yog sib npaug rau 16mm), tensile zog 470-630 MPa, thiab elongation yam tsawg kawg nkaus ntawm 20-22% nyob ntawm thickness.
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.
