Cov lus nug zoo heev. Qhov no yog ib qho kev tsis meej pem. Qhov txawv tseem ceeb yog qhov ntawdS355 JRyog aqib khoom sivraws li tus qauv European, thaumJ2yog asub- qib kev xaivraucuam tshuam toughnessnyob rau hauv qub North American cov qauv ASTM.
Nov yog cov ncauj lus kom ntxaws:
1. S355JR (European Standard - EN 10025-2)
S355:Tus "S" sawv cev rau "Structural Steel," thiab "355" qhia qhovyam tsawg kawg nkaus yield zoghauv MPa (355 MPa ≈ 51,300 psi).
JR:Qhov no yog qhovcuam tshuam toughness sub-qib. Nws qhia meej tias cov khoom tau raug sim rau Charpy V-notch cuam tshuam lub zog ntawm+20℃(chaw kub)thiab yuav tsum ua kom tiav qhov tsawg kawg nkaus27 jul. "J" sawv cev rau kev cuam tshuam lub zog ntawm qhov ntsuas kub, thiab "R" txhais tau tias chav tsev kub.
2. Qib J2 (North American Standards - ASTM A36 / A283, thiab lwm yam)
Qib:Qhov no yog hais txog cov khoom zoo lossis qib zog hauv tus qauv. Piv txwv li, hauvASTM A 283 3, koj muaj Qib A, B, C, thiabD.
J2:Qhov no yogtsis yog qib ntawm nws tus kheej. Nws yog ibKev Xav Tau Ntxiv(feem ntau txhais tau tias "S" lossis ncaj qha qhia) uas tuaj yeem siv rau ntau qib.
J:Txhais tau tias cov khoom tau dhau losCharpy V- ntsuas qhov cuam tshuam.
2:Qhia covntsuas kub: +20℃(chaw kub), zoo ib yam li S355JR's "JR" yuav tsum tau.
Covyam tsawg kawg nkaus lub zogxav tau rau J2 feem ntau20 ft -lbf (27 Joules), uas yog tib yam li S355JR's 27J qhov yuav tsum tau ua.
Direct Comparison & Qhov Tseem Ceeb Qhov txawv
| Feature | S355JR (EN 10025-2) | Qib nrog J2 Requirement (xws li ASTM A283 Gr.D) |
|---|---|---|
| Qhov system | Teb chaws Europe (EN). Lub toughness (JR) yogib qhomus rau qib npe. | North American (ASTM). Lub toughness (J2) yog ibxaiv tau ntxiv. |
| Yield zog | Yam tsawg kawg nkaus 355 MPa (rau thickness Tsawg dua los yog sib npaug li 16 hli). | Nyob ntawm lub hauv paus qib. ASTM A283 Gr.D muaj qhov tawm los ntawm 230 MPa (33 ksi) -qhov no yog qhov qis dua. |
| Tensile zog | 470-630 MPa. | Nyob ntawm lub hauv paus qib. A283 Gr.D: 400-550 MPa. |
| Impact Toughness | Yuav tsum tau:27J min ntawm +20℃. | Yeem (yog tias xaj):27J min ntawm +20℃. |
| Lub tswvyim sib npaug | Covze tshaj ASTM sib npaug nyob rau hauv cov nqe lus ntawm ob lub zog thiab toughnessyogASTM A529 Gr 1., uas muaj 55 ksi (380 MPa) min tawm los thiab feem ntau suav nrog kev ntsuas kev cuam tshuam. | J2 ib leeg tsis txhais lub zog.Koj yuav tsum paub cov qib hauv paus (piv txwv li, A36, A283 Gr.D, A572 Gr.50). |
Qhov tseem ceeb tshaj plaws:
Koj tsis tuaj yeem piv tau yooj yimS355 JRrauJ2. Koj yuav tsum sib pivS355 JRua kom tiavASTM Qib + Cov Lus Qhia Ntxiv.
S355JR yog ob qho tib si lub zog thiab toughness specification.
J2 tsuas yog qhov tshwj xeeb toughnessuas yuav tsum tau txuas nrog rau qib hauv paus uas txhais tau lub zog.
Common Equivalent Scenario:
Yog North American kos duab hu rauASTM A36 nrog Cov Lus Qhia Ntxiv J2, nws hais tias:
A36 Lub Zog: Min Yield 250 MPa (36 ksi), Tensile 400-550 MPa.
J2 Toughness: 27J ntawm +20℃.
Cov neeg tsim qauv European tab tom nrhiav kev hloov pauv ncaj qha yuav xaivS235 JR(uas muaj 235 MPa tawm los thiab tib lub toughness),tsis yog S355JR. S355JR muaj zog ntau dua.
Hauv cov ntsiab lus:S355 JRyog amuaj zog, cuam tshuam-kuaj qib steel. J2yog ibcuam tshuam kuaj mobuas tuaj yeem siv rau ntau (feem ntau qis dua - zog) qib steel. Qhov sib txawv tseem ceeb yog nyob rau hauv cov qauv txheej txheem: ib pob khoom muaj zog thiab toughness, lwm yam cais lawv.