S235JR yogtsis yogstainless hlau; nws yog ib qho qis -carbon, tsis yog- alloy structural (mild) steel paub zoo weldability thiab lub zog, siv nyob rau hauv kev tsim kho, whereas stainless hlau muaj chromium rau corrosion kuj thiab yog kim dua. S235JR yuav tsum muaj cov txheej txheem tiv thaiv (xws li pleev xim lossis galvanizing) rau kev siv sab nraum zoov, tsis zoo li cov hlau tsis muaj steel, uas tsim cov txheej txheem tiv thaiv oxide.
1. Tshuaj muaj pes tsawg leeg
S235 JR
S235JR yog ib qho tsis yog - alloy structural steel raws li EN 10025 - 2 tus qauv. Nws cov tshuaj muaj pes tsawg leeg feem ntau muaj hlau (Fe), nrog carbon (C) cov ntsiab lus feem ntau mus txog ib ncig ntawm 0.17 - 0.20% (siv nrog cov khoom tsim thiab tuab). Nws kuj muaj manganese (Mn) nyob ib ncig ntawm 0.30 - 0.60%, silicon (Si) txog 0.35%, phosphorus (P) txog 0.045%, thiab sulfur (S) txog 0.045%. Cov ntsiab lus ntawm cov pa roj carbon ntau ua rau nws lub zog tab sis kuj ua rau nws yooj yim dua rau xeb.
Nco ntsoov, nws tsis muaj qhov tseem ceeb alloying ntsiab rau stainless hlau khoom: chromium (Cr).
Stainless hlau
Stainless hlau yog tus yam ntxwv los ntawm qhov tsawg kawg nkaus chromium cov ntsiab lus ntawm kwv yees li 10.5% los ntawm huab hwm coj. Chromium yog ib qho tseem ceeb heev vim nws tsim nyias nyias, ua raws, thiab nws tus kheej - kho cov yeeb yaj kiab tsis zoo ntawm cov hlau nto thaum raug oxygen. Cov zaj duab xis passive no ua ib qho thaiv, tiv thaiv ntxiv oxidation thiab corrosion ntawm cov hlau hauv qab. Ntxiv nrog rau chromium, stainless hlau kuj tseem muaj lwm yam alloying xws li npib tsib xee (Ni), molybdenum (Mo), thiab lwm yam, uas ntxiv dag zog rau lawv cov corrosion kuj, lub zog, thiab lwm yam khoom.
2. Corrosion Resistance
S235 JR
Vim nws cov ntsiab lus tsis tshua muaj hlau thiab tsis muaj chromium, S235JR muaj qhov tsis zoo corrosion kuj. Thaum raug rau cov huab cua, tshwj xeeb tshaj yog nyob rau hauv cov av ntub los yog corrosive ib puag ncig, nws yuav maj mam react nrog oxygen thiab noo noo los tsim hlau oxide (xeb). Piv txwv li, nyob rau hauv ib qho chaw sab nraum zoov nrog cov av noo siab, S235JR yuav pib pom cov tsos mob ntawm xeb nyob rau hauv ib lub sij hawm luv luv, uas tuaj yeem ua rau txo qis hauv nws cov khoom siv kho tshuab thaum lub sijhawm.
Stainless hlau
Stainless hlau, vim yog kev tiv thaiv chromium - raws li zaj duab xis passive, muaj qhov zoo dua corrosion kuj. Lawv tuaj yeem tiv taus ntau yam corrosive media, suav nrog dej, acids, alkalis, thiab ntsev, rau ntau qhov sib txawv nyob ntawm qib tshwj xeeb. Piv txwv li, 304 stainless hlau, ib hom siv dav, tuaj yeem tiv taus huab cua corrosion, me ntsis acidic thiab alkaline ib puag ncig zoo, thiab feem ntau yog siv rau hauv cov ntawv thov uas muaj kev tiv thaiv corrosion yog qhov tseem ceeb, xws li hauv cov tais diav, khoom noj khoom haus, thiab architectural facades.
3. Mechanical Properties thiab Applications
S235 JR
S235JR muaj qhov tsawg kawg nkaus yield zog ntawm 235 MPa (rau thicknesses txog 16 hli). Nws yog tsuas yog siv rau hauv kev siv cov qauv siv uas tus nqi - kev ua tau zoo yog qhov tseem ceeb thiab siab - qib corrosion kuj tsis yog qhov yuav tsum tau ua. Piv txwv suav nrog kev tsim vaj tsev yooj yim, dav dav - lub hom phiaj siv tshuab ua haujlwm, thiab qee qhov qis - kev ntxhov siab hauv kev lag luam tsheb.
Stainless hlau
Stainless steels tuaj nyob rau hauv ntau yam ntawm txhua yam khoom nyob ntawm seb lawv muaj pes tsawg leeg thiab kev kho cua sov. Lawv tuaj yeem siv rau hauv qhov chaw corrosive heev hauv kev lag luam xws li kev ua tshuaj lom neeg, dej hiav txwv, thiab kev kho mob. Piv txwv li, nyob rau hauv kev lag luam marine, stainless steels yog siv los tsim cov khoom siv hauv nkoj uas raug dej hiav txwv tas li; Hauv kev kho mob, stainless hlau yog siv rau cov cuab yeej phais vim lawv cov biocompatibility thiab corrosion kuj.
Cov yam ntxwv tseem ceeb ntawm S235JR
Hom: Tsis yog- alloy structural steel (Mild Steel).
Txheem: Txhais los ntawm EN 10025-2 tus qauv.
Khoom: Zoo weldability, formability, thiab cuam tshuam tsis kam ntawm chav tsev kub.
Siv: choj, tsev, machinery, thiab general engineering lug.
Vim li cas nws tsis yog Stainless Hlau
Muaj pes tsawg leeg: Tsis muaj cov ntsiab lus chromium siab (feem ntau 10.5% lossis ntau dua) uas txhais tau tias cov hlau tsis muaj steel thiab muab kev tiv thaiv kev tiv thaiv hauv lub cev.
Corrosion: Yuav xeb yog tias raug ya raws, yuav tsum tau pleev xim lossis galvanizing rau kev tiv thaiv.