SUS304 Austenitic kev paub

SUS304 yog cov khoom siv dav siv austenitic stainless hlau, muaj npe nrov rau nws qhov zoo tshaj plaws corrosion kuj, formability thiab nqi -effectiveness. It contains balanced chromium (18–20%) and nickel (8–10.5%) content, forming a dense chromium oxide layer on the surface to resist atmospheric, mild acid and alkaline corrosion, making it a staple in general industrial and consumer applications.

Tshuaj muaj pes tsawg leeg (Key, % JIS G4305): C Tsawg dua lossis sib npaug rau 0.08; Cr18.0–20.0; 8.0–10.5; Mn Tsawg dua lossis sib npaug rau 2.0; Si Less tshaj los yog sib npaug rau 1.0

Mechanical Properties (Annealed): Tensile Strength Ntau dua lossis sib npaug rau 515MPa; Yield zog ntau dua los yog sib npaug rau 205MPa; Elongation Ntau dua lossis sib npaug li 40%; Hardness Tsawg dua los yog sib npaug rau 201HB

Kev Ua Haujlwm Zoo: Superior general corrosion kuj; zoo heev formability rau dabtsi yog khoov thiab stamping; zoo weldability; tus nqi- zoo rau kev tsim khoom loj.

Daim ntawv thov: Cov khoom siv hauv chav ua noj, architectural trim, khoom noj khoom haus, tshuaj cia tanks (tsis yog- tawm tsam).

Qib sib npaugKhoom: ASTM 304, EN 1.4301, DIN X5CrNi18-10

Sib piv nrog SUS304L: SUS304 muaj cov ntsiab lus carbon ntau dua (tsawg dua lossis sib npaug li 0.08% vs. Tsawg dua lossis sib npaug li 0.03% ntawm 304L), muab qhov zoo dua siab- qhov kub thiab txias, tab sis nws yooj yim rau intergranular corrosion tom qab vuam; 304L zam qhov teeb meem no yam tsis muaj kev tshaj tawm -weld heat treatment.

FAQs

Vim li cas SUS304 yog qib stainless hlau siv dav tshaj plaws? SUS304 tawm tsam qhov sib npaug zoo ntawm kev tiv thaiv corrosion, cov khoom siv kho tshuab thiab cov nqi, uas yog qhov laj thawj tseem ceeb rau nws qhov chaw. Nws 18-20% chromium cov ntsiab lus tsim cov txheej txheem tiv thaiv oxide ruaj khov, tiv thaiv xeb thiab tshuaj lom me me nyob rau hauv feem ntau niaj hnub thiab kev lag luam ib puag ncig. Tsis zoo li qib siab dua -qib alloys xws li 316, SUS304 tsis muaj molybdenum kim, yog li nws muaj tus nqi qis dua, haum rau cov ntawv loj -. Nws cov formability zoo heev tso cai rau cov tuam txhab ua kom nws ua ntau yam duab, los ntawm chav ua noj dab dej mus rau vaj tse vaj tse, ntsib ntau yam kev xav tau. Tsis tas li ntawd, nws cov weldability zoo ua kom muaj kev ncaj ncees ntawm cov khoom siv welded, txuas ntxiv nthuav dav nws daim ntawv thov hauv kev tsim kho thiab kev lag luam.

 

Qhov kev pabcuam siab tshaj plaws ntawm SUS304 yog dab tsi? Qhov kev pabcuam siab tshaj plaws ntawm SUS304 yog li 870 degree, tab sis nws qhov kev ua tau zoo yuav txawv nyob ntawm qhov chaw tshwj xeeb thiab kev ntxhov siab. Thaum kub qis dua 650 degree, SUS304 khaws cia feem ntau ntawm nws cov khoom siv dag zog thiab kev tiv thaiv corrosion, ua rau nws tsim nyog rau cov khoom siv hluav taws xob thiab cov qhov cub ua haujlwm. Thaum qhov kub siab tshaj 650 degree, nws lub zog tawm los pib txo qis, tab sis nws tseem tuaj yeem siv rau cov khoom tsis yog -load-cov kabmob xws li cov khoom siv rau cov khoom siv hluav taws xob. Txawm li cas los xij, thaum raug kub hnyiab ntawm 425℃thiab 815℃rau lub sijhawm ntev, SUS304 yuav muaj kev nkag siab zoo, ua rau muaj kev cuam tshuam ntawm intergranular, tshwj xeeb tshaj yog tom qab vuam. Yog li ntawd, rau siab -kub welded daim ntaub ntawv, nws yog tsim nyog los xaiv cov qib stabilized xws li SUS321 los yog tsawg- carbon qib SUS304L.

SUS304 puas tuaj yeem siv rau hauv ib puag ncig marine? SUS304 muaj kev txwv tsis pub siv nyob rau hauv ib puag ncig marine thiab tsis pom zoo rau ntev - siv nyob rau hauv cov dej ntsev los yog ntug hiav txwv dej nrog cov av noo siab. Cov ntsiab lus chloride siab hauv dej hiav txwv yuav ua rau cov chromium oxide tiv thaiv txheej ntawm SUS304, ua rau pitting thiab crevice corrosion, uas yuav txo tau lub neej kev pab cuam ntawm cov khoom. Txawm hais tias nws tuaj yeem tiv taus cov tshuaj ntsev me ntsis hauv luv luv -lub sij hawm los yog tsawg- chloride scenarios, rau ntev - lub sij hawm marine daim ntaub ntawv xws li nkoj qhov chaw los yog offshore platforms, molybdenum - muaj cov qib xws li SUS316 yog cov kev xaiv zoo dua, vim molybdenum tuaj yeem txhim khu kev tiv thaiv. chloride{11}}induced corrosion. Yog tias SUS304 yuav tsum tau siv rau hauv marine- cov ntawv thov ntsig txog, kev saib xyuas tsis tu ncua thiab kev tiv thaiv{15}} txheej txheej yuav tsum tau ua kom ntev nws lub neej kev pab.

 

Yuav ua li cas vuam SUS304 kom tsis txhob muaj teeb meem corrosion? Vuam SUS304 yuav tsum muaj kev tswj xyuas nruj ntawm cov khoom siv hluav taws xob thiab xaiv cov ntaub ntawv muab tub lim kom txo tau qhov kev pheej hmoo ntawm intergranular corrosion. Ua ntej, xaiv SUS308 lossis SUS309 muab tub lim, uas muaj cov ntsiab lus nickel ntau dua li SUS304, pab kom ruaj khov austenitic qauv ntawm cov vuam thiab txo qhov nyiam kub tawg. Thaum lub sijhawm vuam, siv cov khoom siv hluav taws xob tsawg, txo lub sijhawm vuam, thiab txo qhov loj ntawm cov cua sov- cuam tshuam cheeb tsam (HAZ), vim tias cov cua kub ntau dhau yuav txhawb kev tsim cov chromium carbides hauv HAZ, ua rau muaj kev kub ntxhov. Tom qab vuam, nws raug nquahu kom ua tom qab-weld kev kho cua sov (annealing ntawm 1010-1120℃thiab dej quenching) kom yaj chromium carbides thiab rov ua kom corrosion kuj ntawm thaj chaw weld. Tsis tas li ntawd, kev ntxuav cov npoo npoo tom qab vuam kom tshem tawm cov nplai oxide thiab cov impurities tuaj yeem pab txhim kho corrosion.

 

Dab tsi yog qhov txawv ntawm SUS304 thiab SUS316 hais txog kev tiv thaiv corrosion? Cov tub ntxhais sib txawv hauv kev tiv thaiv corrosion ntawm SUS304 thiab SUS316 yog nyob rau hauv lub xub ntiag ntawm molybdenum hauv SUS316, uas ua rau nws muaj zog tiv thaiv chloride -induced pitting thiab crevice corrosion. SUS304 tsuas yog tuaj yeem tiv taus huab cua huab cua thiab cov tshuaj lom neeg tsis zoo, tab sis nws yooj yim rau corrosion hauv chloride- thaj chaw nplua nuj xws li dej hiav txwv thiab brine. SUS316 muaj 2-3% molybdenum, uas tuaj yeem txhim kho cov zaj duab xis passive ntawm cov hlau, tiv thaiv chloride ions los ntawm kev nkag mus thiab ua rau cov txheej txheem tiv thaiv. Tsis tas li ntawd, SUS316 muaj cov ntsiab lus npib tsib xee ntau dua (10–14%) dua SUS304 (8–10.5%), uas txhim kho nws qhov siab -kub stability thiab toughness. Yog li, SUS316 yog qhov tsim nyog rau cov cheeb tsam hnyav xws li marine engineering, chemical processing thiab cov cuab yeej kho mob, thaum SUS304 txaus rau kev siv dav dav -cov phiaj xwm siv nrog tus nqi qis.