Hauv kev tsim kho vaj tse thiab kev tsim kho, kev xaiv cov khoom siv tsim nyog yog qhov tseem ceeb rau kev ua kom muaj kev nyab xeeb, lub neej ntev, thiab kev siv nyiaj tsim nyog. Tus qauv EuropeanEN10210qhia txog cov xwm txheej kev xa khoom rau cov qauv kub tiav lawmcov seem khoobua los ntawm cov hlau tsis yog hlau thiab cov hlau zoo. Cov qib uas feem ntau teev tseg yog S355J0H thiab S355J2H. Txawm hais tias lawv koom nrog tib tsev neeg thiab muaj ntau yam ntxwv, kev nkag siab txog lawv qhov sib txawv yog qhov tseem ceeb rau kev xaiv cov khoom siv zoo tshaj plaws. Tsab xov xwm no tshawb nrhiav txog cov yam ntxwv sib txawv, cov tshuaj lom neeg sib xyaw, kev ua haujlwm ntawm lub tshuab, thiab cov ntawv thov ntawm ob qib hlau no.

1. Txhais cov qib hlau

Lub kaw lus xaiv nws tus kheej muab cov lus qhia thawj zaug rau lawv tus kheej thiab lub hom phiaj. Raws li EN 10027-1, cov npe raug faib ua raws li hauv qab no:

S: Sawv cev rau "Cov Hlau Qauv."

355: Qhia txog qhov tsawg kawg nkaus ntawm lub zog tawm los (hauv megapascals, MPa) rau cov tuab txog li 16 hli. Qhov no yog qhov zoo sib xws ntawm ob qib.

J0 / J2: Qhov no qhia txog qhov yuav tsum tau muaj zog cuam tshuam. "J0" txhais tau tias cov khoom siv yuav tsum ua tiav qhov tsawg kawg nkaus ntawm lub zog cuam tshuam ntawm 27 Joules ntawm 0 ° C. "J2" yuam kom muaj tib lub zog cuam tshuam tsawg kawg nkaus ntawm 27 Joules, tab sis ntawm qhov kub qis dua ntawm -20 ° C.

H: Txhais tau tias "Hollow Sections," tshwj xeeb yog cov uas kub-tiav, raws li tau txhais los ntawm tus qauv EN10210.

2. Cov Tshuaj Lom Zem: Kev Hloov Pauv Me Me nrog Kev Cuam Tshuam Loj

Ob leeg S355J0H thiab S355J2H yog cov hlau uas muaj manganese uas paub txog lawv qhov kev vuam zoo. Cov kev cai ntawm cov tshuaj lom neeg raws li EN10210 zoo sib xws heev, tab sis muaj qhov sib txawv tseem ceeb hauv cov kev txwv uas tso cai rau sulfur (S), phosphorus (P), thiab kev coj ua deoxidation, uas cuam tshuam ncaj qha rau cov hlau qhov huv thiab kev ua haujlwm kub qis.

Cov Khoom Siv Tshuaj	S355J0H (Feem ntau % siab tshaj)	S355J2H (Qhov nruab nrab feem pua)	Kev cuam tshuam ntawm qhov sib txawv
Cov pa roj carbon (C)	≤ 0.22	≤ 0.22	Zoo sib xws; ua kom muaj zog zoo thiab weldability.
Manganese (Mn)	≤ 1.60	≤ 1.60	Zoo sib xws; pab txhawb rau lub zog.
Silicon (Si)	≤ 0.55	≤ 0.55	Zoo sib xws; ua haujlwm ua tus deoxidizer.
Phosphorus (P)	≤ 0.035	≤ 0.030	J2H muaj qhov txwv nruj dua, txo qhov brittleness.
Sulfur (S)	≤ 0.035	≤ 0.030	J2H muaj qhov txwv nruj dua, txhim kho kev huv thiab kev tawv.
Nitrogen (N)	≤ 0.009	-	J2H feem ntau raug tua tag nrho (kho cov noob zoo), tsis xav tau tus nqi N siab tshaj plaws.

Qhov tseem ceeb uas yuav tsum tau ua yog tias S355J2H xav tau kev tswj hwm cov khoom tsis huv xws li phosphorus thiab sulfur ntau dua. Qhov no ua rau cov hlau huv dua nrog cov qauv microstructure sib xws, uas yog qhov tseem ceeb rau kev ua tiav cov khoom siv ruaj khov ntawm qhov kub qis dua xoom. Ntxiv mus, S355J2H raug cais ua "FF" (Tua tag nrho) hlau, txhais tau tias nws raug kho nrog cov khoom xws li txhuas los tsim cov qauv zoo, uas ua rau cov khoom siv tawv dua. S355J0H feem ntau yog "FN" (Tsis pub siv Rimming steel), uas tsis nruj heev.

3. Cov Khoom Siv Kho Tshuab: Qhov Txawv Txawv ntawm Kev Ruaj Khov

Raws li qhov kev xaiv qib qhia, cov khoom siv kho tshuab, tshwj xeeb tshaj yog cov zis thiab lub zog tensile, zoo ib yam rau ob qib. Qhov sib txawv ntawm lawv yog lawv qhov kev ua tau zoo hauv qab kev cuam tshuam ntawm qhov kub sib txawv.

Khoom Siv Kho Tshuab	S355J0H	S355J2H
Lub Zog Tawm (ReH)	≥ 355 MPa (t ≤ 16 hli)	≥ 355 MPa (t ≤ 16 hli)
Lub zog tensile (Rm)	470 - 630 MPa (t ≤ 3 hli)	470 - 630 MPa (t ≤ 3 hli)
Kev ntev (A)	≥ 22% (ntev)	≥ 22% (ntev)
Lub zog cuam tshuam (KV)	≥ 27 J @ 0°C	≥ 27 J @ -20°C

Qhov sib txawv ntawm qhov kub thiab txias ntawm kev sim cuam tshuam no yog qhov tseem ceeb tshaj plaws hauv kev xaiv ntawm ob qho. Thaum S355J0H tawv txaus rau feem ntau ntawm cov ntawv thov sab hauv tsev thiab sab nraum zoov, S355J2H tau tsim los tiv thaiv kev tawg yooj yim hauv cov chaw txias dua.

4. Cov Ntawv Thov thiab Cov Qauv Xaiv

Qhov kev xaiv ntawm S355J0H thiab S355J2H feem ntau yog txiav txim siab los ntawm qhov kub qis tshaj plaws ntawm cov qauv thiab qhov tseem ceeb ntawm daim ntawv thov.

S355J0H: Kev Xaiv Uas Pheej Yig Rau Cov Huab Cua Kub

Cov Ntawv Thov Ib Txwm Muaj: Kev tsim kho vaj tse dav dav, chaw ntau pob, platforms, thiab cov khoom siv kho tshuab hauv thaj chaw uas muaj huab cua sov lossis txias uas qhov kub tsis tshua muaj, yog tias puas tau, poob qis dua 0 ° C.

Qhov Zoo: Nws muab lub zog zoo heev thiab weldability ntawm tus nqi qis dua li nws cov J2 counterpart, ua rau nws yog qhov kev xaiv pheej yig rau cov haujlwm uas qhov cuam tshuam qis-kub tsis yog qhov txhawj xeeb tseem ceeb.

S355J2H: Kev Xaiv Kev Nyab Xeeb rau Qhov Chaw Uas Nyuaj thiab Txias

Cov Ntawv Thov Ib Txwm Muaj: Cov qauv dej hiav txwv, cov choj hauv cov roob lossis sab qaum teb, cov chaw cia khoom txias, cov cua ntsawj, thiab txhua yam khoom siv uas raug kev thauj khoom dynamic hauv cov xwm txheej kub qis.

Qhov Zoo: Nws qhov kev ua tau zoo ntawm kev cuam tshuam ntawm -20 ° C muab qhov kev nyab xeeb tseem ceeb tiv thaiv kev tawg tawg hauv huab cua txias. Cov qauv noob zoo dua kuj pab me ntsis rau kev txhim kho weldability thiab cov khoom tuab.

Xaus lus

Hauv kev xaus, ob qho tib siEN10210 S355J0Hthiab S355J2H yog cov hlau zoo, kub-ua tiav cov qauv hollow seem uas muaj qhov tsawg kawg nkaus ntawm 355 MPa. Lawv muaj cov tshuaj lom neeg zoo sib xws thiab cov kev xav tau tensile thiab yield zog zoo sib xws. Txawm li cas los xij, lawv tsis tuaj yeem hloov pauv tau hauv txhua qhov xwm txheej. S355J2H txawv nws tus kheej los ntawm kev tswj hwm nruj dua ntawm cov khoom tsis huv (P & S) thiab cov qauv zoo-tua, cov qauv zoo, uas lav qhov tsawg kawg nkaus ntawm kev cuam tshuam ntawm 27 Joules ntawm -20 ° C, piv rau S355J0H's 27 Joules ntawm 0 ° C. Rau cov haujlwm hauv huab cua txias lossis cov neeg xav tau kev nyab xeeb siab dua tiv thaiv kev tawg brittle, S355J2H yog qhov tsim nyog, txawm tias kim dua me ntsis, kev xaiv. Rau cov ntawv thov dav dav hauv thaj chaw sov, S355J0H tseem yog qhov kev xaiv txhim khu kev qha thiab pheej yig.