Firstly, cia pib nrog cov ntsiab lus ntawm txhua tus ntawm cov qib no. S235JR yog qhov tsis yog - Alloy alleal qauv siv hlau uas tau siv dav hauv kev tsim kho kev tsim kho. Nws yog feem ntau siv nyob rau hauv kev tsim cov choj, nkoj, vaj tse, thiab lwm yam qauv uas xav tau qib siab thiab kav ntev. S235J0, ntawm qhov tod tes, kuj yog ib qho tseem tsis yog - aluminium txheej txheem steel uas feem ntau siv hauv kev tsim kho kev tsim kho. Nws muaj cov khoom zoo sib xws rau S235JR, tab sis nrog qee qhov sib txawv me ntsis.
Ib qho ntawm lub ntsiab sib txawv ntawm S235JR thiab S235J0 yog lawv qhov tsawg kawg yog lub zog. Qhov tsawg kawg nkaus los lub zog ntawm S235JR yog 235 MPa, thaum qhov tsawg kawg nkaus lub zog ntawm S235J0 yog 2360 MPa. Qhov no txhais tau tias S235J0 muaj me ntsis siab dua S235JR, ua nws txoj kev xaiv zoo rau cov ntawv thov uas xav tau qib siab ntawm lub zog.
Lwm qhov sib txawv ntawm ob qib no yog lawv qhov kev cuam tshuam lub zog. Kev cuam tshuam lub zog ntawm S235JR yog 27 joules ntawm chav tsev kub, thaum lub zog cuam tshuam ntawm S235J0 yog 27 Joules ntawm 0 degree. Qhov no txhais tau tias S235J0 tau zoo dua cuam tshuam lub zog ntawm tsawg kub dua S235JR. Qhov no ua rau nws xaiv tau zoo dua rau cov ntawv thov uas tuaj yeem ua rau txias txias txias.
Nyob rau hauv cov nqe lus ntawm cov tshuaj muaj tshuaj, ob qho tib si s235jr thiab s235jr thiab zoo sib xws, nrog lub ntsiab sib txawv yog tus nqi ntawm phosphorus thiab leej faj. S235JR muaj cov ntsiab lus siab tshaj plaws ntawm 0.045%, thaum S235J0 muaj cov ntsiab lus siab tshaj plaws ntawm 0.040%. Ib yam li ntawd, S235jr muaj cov ntsiab lus ntawm cov txiv ntoo uas siab tshaj plaws ntawm 0.045%, thaum S235J0 muaj cov ntsiab lus Sulfur ntau tshaj plaws ntawm 0.035%. Cov kev sib txawv no hauv cov tshuaj sib txawv tuaj yeem cuam tshuam rau cov khoom siv mechanical ntawm cov hlau, ib yam li nws cov ntaub ntawv weldability thiab machinability.
Hais txog lawv cov txiaj ntsig thiab qhov tsis zoo, ob qho tib si s235jr thiab s235j0 muaj lawv tus kheej lub zog thiab tsis muaj zog. Ib qho ntawm qhov zoo ntawm S235JR yog nws cov kev tsim kho tau zoo thiab weldability, ua kom yooj yim ua haujlwm nrog rau hauv kev tsim cov qauv. Txawm li cas los xij, nws lub zog qis thiab cuam tshuam kuj yuav txwv nws siv hauv qee cov ntawv thov.
Ntawm qhov tod tes, s235j0 muaj qhov muaj zog dua thiab kev cuam tshuam zoo dua li S235JR, ua rau nws muaj kev xaiv zoo dua rau cov ntawv thov thiab ua kom muaj zog. Txawm li cas los xij, nws qis dua cov ntsiab lus phosphorus thiab cov Sulphur cov ntsiab lus yuav ua rau nws tsis tshua nyiam dua li S235JR.
Hauv kev xaus, S235JR thiab S235JR0 yog ob qib ntawm cov hlau siv hauv kev tsim kho kev tsim kho. Thaum lawv muaj qee qhov sib xws ntawm lawv cov tshuaj muaj tshuaj lom neeg thiab cov khoom, lawv kuj muaj qee qhov sib txawv uas ua rau lawv zoo dua rau qee cov ntawv thov. Choosing the right grade of steel for a particular application requires careful consideration of the specific requirements of the project, including strength, durability, formability, weldability, and machinability.
