Rau cov kab dej uas siv tau zoo, qhov zoo tshaj plaws txhua yam - kev xaiv ib puag ncig yog 304 (los yog 304L) stainless hlau yeeb nkab; rau ntug dej hiav txwv / high-chloride lossis siab dua-spec tej yaam num, siv 316 (los yog 316L).
304 Stainless Steel - Feem ntau rau Cov Dej Haus
304 Stainless Hlau yog cov khoom siv dav siv ntau tshaj plaws rau cov dej haus. Nws suav hais tias muaj kev nyab xeeb rau cov dej haus vim nws:
Resistant xeb thiab corrosion zoo
Tsis yooj yim kis dej
Nws muaj qhov du, huv si
Ua tau ntev thiab raug nqi -zoo
Qhov zoo tshaj plaws rau:Cov kav dej hauv nroog, thaj chaw & kev lag luam txias / dej kub, cov tsev hauv av
Pros:Zoo heev corrosion kuj rau cov kais dej ib txwm, huv si huv, tus nqi qis dua 316
304L:Tsawg-carbon version, zoo dua rau cov pob qij txha welded (tsawg dua kev pheej hmoo ntawm intergranular corrosion)
316 Stainless Steel - Zoo dua rau Corrosive Dej
316 Stainless hlau muaj molybdenum, uas muab nws zoo dua tiv thaiv:
Chlorides
Dej ntsev
Tshuaj corrosion
Pitting
Qhov zoo tshaj plaws rau: Coastal areas, water with chloride >200 ppm, hot water >80 degree, tsev kho mob / kws tshuaj, marine ib puag ncig
Pros:Mo zoo heev txhim khu kev tiv thaiv rau pitting / crevice corrosion los ntawm chlorine thiab ntsev; ntev lub neej nyob rau hauv cov dej txhoj puab heev
316L:Tsawg-carbon, nyiam rau welded systems thiab high-temperature kev pab cuam
Vim li cas cov qib "L" feem ntau nyiam
304 Stainless Hlau thiab 304L Stainless Hlau yog ob qho tib si dav siv austenitic stainless hlau nrog zoo corrosion kuj thiab txhua yam khoom. Qhov sib txawv tseem ceeb yog cov ntsiab lus carbon.
316 Stainless Hlau thiab 316L Stainless Hlau yog cov hlau tsis zoo sib xws uas muaj molybdenum, uas txhim kho corrosion kuj, tshwj xeeb tshaj yog tiv thaiv chlorides thiab dej ntsev.
L=Tsawg carbon
Cov pa roj carbon tsawg ("L"): Tiv thaiv "sensitization" (weld decay) thaum lub sij hawm vuam, tshem tawm qhov xav tau tom qab-weld annealing. Qhov no ua rau kev tsim khoom lag luam yooj yim dua thiab nyab xeeb dua.
Vim tias cov pa roj carbon tsawg, 304Land 316L muaj:
Zoo dua weldability
Txo kev pheej hmoo ntawm corrosion tom qab vuam
Lub neej ua haujlwm ntev dua hauv cov kav dej
Hauv cov kav dej feem ntau, 304L thiab 316L feem ntau tau teev tseg vim tias nws ua tau zoo dua hauv cov txheej txheem welded.L qib muaj tus nqi siab dua li qib qauv.
304vs304l ua
304 stainless hlau muaj cov ntsiab lus siab tshaj plaws ntawm 0.08%.
304L stainless hlau muaj qis tshaj cov ntsiab lus ntawm 0.03%.
304 feem ntau yog siv rau:
Cov khoom siv hauv chav ua noj
Kho kom zoo nkauj daim ntaub ntawv
Kev siv dav dav
304L yog nyiam rau:
Welded kav thiab kav
Cov hlab ntsha siab
Kev kho dej
Cov ntawv thov uas yuav tsum tau siv vuam hnyav
316vs316l ua
316 stainless hlau muaj cov ntsiab lus siab tshaj plaws ntawm 0.08%.
316L stainless hlau muaj cov ntsiab lus siab tshaj plaws ntawm 0.03%.
316 thiab 316L tau dav siv hauv:
Marine ib puag ncig
Kev ua tshuaj lom neeg
Cov cuab yeej siv tshuaj
Cov dej siv tau
Khoom noj khoom haus kev lag luam
316L feem ntau nyiam rau cov kav hlau tsis muaj steel vim tias cov ntawv siv cov yeeb nkab welded yog ntau heev.
316 yog superior rau hnyav, corrosive ib puag ncig; 304 yog tus nqi ntau dua - zoo rau kev siv niaj hnub.
Kev sib piv
Corrosion Resistance
316 > 304 ib.
316 resists dej ntsev, chlorine, tshuaj, kua qaub thiab cov av noo zoo dua.
Thaum tshav kub kub Resistance
Ob leeg ua haujlwm rau qhov kub thiab txias tsis tu ncua; 316 tau zoo me ntsis siab siab -kub stability.
Nqe & Nqi
316 yog 15–30% kim dua 304. 304 yog pob nyiaj siv - phooj ywg.
Ua haujlwm tau
Ob leeg yog ib qho yooj yim mus txiav, weld thiab polish; 304 yog me ntsis yooj yim rau kev ua haujlwm dav dav.
