Duplex S32205 phaj, tseem hu ua 2205 stainless hlau, yog cov khoom siv sib xyaw ua ke zoo tshaj plaws ntawm austenitic thiab ferritic stainless hlau.
Ntawm peb lub Hoobkas tshwj xeeb hauv cov khoom siv stainless hlau thiab npib tsib xee alloy, peb tsim S32205 daim hlau rau ASTM A240 thiab ASME SA240 cov qauv nrog tag nrho traceability. Kab lus no muab qhov pom tseeb ntawm qhov zoo thiab qhov tsis zoo ntawm duplex S32205 phaj yog li koj tuaj yeem txiav txim siab seb nws haum rau koj qhov project.
Qhov zoo ntawm Duplex S32205 Phaj
Kwv yees li ob zaug lub zog ntawm Standard Stainless hlau
S32205 daim hlau muaj qhov tsawg kawg nkaus lub zog ntawm 65 ksi (450 MPa) thiab lub zog tensile ntawm 95 ksi (655 MPa). Rau kev sib piv, hom 316L stainless hlau muaj lub zog tawm los ntawm tsuas yog li 30 ksi (205 MPa). Qhov no txhais tau tias koj tuaj yeem siv lub phaj nyias nyias S32205 kom ua tiav tib lub thauj khoom -cov kabmob muaj peev xwm ntau dua li 316L phaj.
Siv cov khoom siv tsawg txo qhov hnyav thiab txo cov nqi tsim khoom. Piv txwv li, lub nkoj siab ua los ntawm S32205 tuaj yeem muaj cov phab ntsa ze li ib nrab ntawm cov tuab tuab li ib qho ua los ntawm 316L, ua rau lub nkoj sib dua, yooj yim rau kev thauj mus los, thiab pheej yig dua los txhawb cov txheej txheem.
Kev ua haujlwm zoo rau chloride Stress Corrosion Cracking
Chloride stress corrosion cracking (SCC) yog ib qho uas ntsiag to killer rau tus qauv austenitic stainless hlau zoo li 304 thiab 316. Thaum cov hlau no raug cov tshuaj chlorides (feem ntau hauv dej hiav txwv, de- icing ntsev, thiab tshuaj brine) ntawm qhov kub siab tshaj 60 degree, cov kab nrib pleb me me tuaj yeem tsim thiab loj hlob sai. S32205 daim hlau tiv taus cov tshuaj chloride SCC vim lawv cov qauv ob theem -.
Hauv cov qauv ntawm ntug dej hiav txwv, cov nroj tsuag tshuaj, thiab cov khoom siv hauv pas dej da dej, S32205 daim hlau muab kev ntseeg siab ntev - cov kev pab cuam lub sij hawm qhov twg 316L yuav tawg tsis pub dhau lub hlis lossis xyoo. Qhov kev tawm tsam no ib leeg tau ua rau S32205 mus- rau cov khoom siv rau marine heat exchangers, desalination cog piping, thiab offshore platform khoom.
Superior Pitting thiab Crevice Corrosion Resistance
Lub pitting kuj sib npaug tus naj npawb (PREN) rau S32205 feem ntau yog 33–35, xam raws li PREN=%Cr + 3.3×%Mo + 16×%N. Nrog 22% chromium, 3% molybdenum, thiab 0.15% nitrogen, S32205 ua tau zoo dua li 316L (PREN ≈ 25) hauv chloride-muaj ib puag ncig.
Cov dej hiav txwv tuav cov tshuab, cov kab hluav taws kub ntawm cov nkoj, thiab cov chaw cia khoom siv tshuaj lom neeg tau txais txiaj ntsig los ntawm qhov kev tiv thaiv zoo dua. S32205 daim hlau tuaj yeem ua rau muaj kev nyab xeeb txog li 10,000 ppm chlorides ntawm qhov kub nruab nrab, thaum 316L yuav pib pitting ntawm ntau qis dua.
Tus nqi -Piv tau piv rau siab dua -Nickel Alloys
Nickel yog ib qho ntawm cov khoom siv kim tshaj plaws. S32205 tsuas muaj 5% npib tsib xee, qhov 316L muaj 10-14% npib tsib xee, thiab siab -kev ua tau zoo alloys xws li Hastelloy lossis Inconel muaj 40-70% npib tsib xee. Vim tias S32205 siv tsawg dua nickel, nws tus nqi pib feem ntau yog 20-40% qis dua 316L ntawm ib qho - phaus hauv paus- thiab thaum koj ua rau nws lub zog ntau dua, tag nrho cov nqi ntawm cov phiaj xwm feem ntau ua ntau txaus nyiam.
Yog tias koj xav tau qee yam kev ua haujlwm, tus nqi ntawm ib chav tsev ntawm lub zog rau S32205 yog qis dua rau qib austenitic. Qhov no ua rau S32205 yog qhov kev xaiv pheej yig rau cov haujlwm loj - xws li cov tank cia, txuas hniav, thiab cov hlab ntsha siab.
Zoo Weldability thiab Fabricability nrog cov txheej txheem tsim nyog
Tsis zoo li cov qib duplex thaum ntxov uas nyuaj rau welding yam tsis poob kev tiv thaiv corrosion, S32205 tuaj yeem ua tiav siv cov txheej txheem xws li GTAW (TIG), SMAW (stick), thiab GMAW (MIG). Nrog rau cov hlau muab tub lim kom zoo thiab tswj cov cua sov, cov hlau vuam thiab cov cua sov- cuam tshuam thaj chaw muaj qhov sib npaug austenite-ferrite piv thiab cov khoom zoo.
Koj cov khoom siv vuam uas twb muaj lawm tuaj yeem tswj tau S32205, yog tias koj ua raws li cov txheej txheem pom zoo. Tsis xav tau rau cov cub tawg tshwj xeeb lossis cov txheej txheem txawv txav -tsuas yog kev qhuab qhia ntawm kev sib tshuam ntawm qhov kub thiab txias (hauv qab 300℃F / 150 degree) thiab cov khoom siv hluav taws xob. Post-weld kev kho cua sov feem ntau tsis tas yuav tsum tau ua, txuag lub sijhawm thiab nyiaj txiag.
Higher Thermal Conductivity thiab qis Thermal Expansion
S32205 daim hlau muaj li ntawm 30% siab dua thermal conductivity tshaj 316L, lub ntsiab lus ntawm kev hloov hluav taws xob los ntawm cov khoom siv tau zoo dua. Nyob rau tib lub sijhawm, S32205 muaj cov coefficient ntawm thermal expansion zoo ib yam li carbon steel -kwv yees li 15% qis dua 316L.
Tsawg thermal expansion kuj txhais tau hais tias tsis tshua muaj kev sib txawv thaum S32205 cov khoom yog welded rau carbon steel qauv, simplifying tsim thiab txo kev qaug zog txaus ntshai.
Qhov tsis zoo ntawm Duplex S32205 Phaj
Kev Pabcuam Kub Kub Muaj Ntau Yam
Thaum S32205 ua tau zoo heev ntawm ambient kub thiab nruab nrab, nws tsis tuaj yeem siv tau ntev -kev pabcuam ntev tshaj li ntawm 300℃(572℃F). Ntawm qhov kub siab dua, cov khoom raug hloov pauv theem-tshwj xeeb, kev tsim ntawm sigma theem, ib qho nkig intermetallic compound uas ua rau txo cov tawv thiab corrosion kuj.
Yog tias koj daim ntawv thov cuam tshuam nrog qhov kub thiab txias siab tshaj 300 degree, xws li hauv cov khoom siv hauv cub tawg lossis siab -kub tso cua sov, koj yuav tsum xaiv cov hlau sib txawv-feem ntau yog austenitic stainless hlau zoo li 310S lossis nickel-raws li superalloy. Rau qhov kub hauv qab 300 degree, S32205 tseem zoo kawg nkaus haum.
Txo Toughness ntawm Sub-Zero Temperatures
S32205 muaj qhov ductile - mus rau - qhov hloov pauv kub (DBTT) nyob ib puag ncig -50℃(-58℃F). Hauv qab no qhov kub thiab txias, theem ferrite hauv cov qauv duplex tuaj yeem ua nkig, ua rau cov khoom raug cuam tshuam los ntawm kev ua tsis tiav. Nyob rau hauv sib piv, tag nrho austenitic stainless hlau tseem tawv mus rau cryogenic kub.
Tsis txhob hais qhia S32205 rau cov kev pabcuam cryogenic xws li cov khoom siv hluav taws xob ua kua (LNG), kua nitrogen piping, lossis Arctic - cov khoom siv qib qis dua -50℃. Rau cov xwm txheej zoo li no, siv 304L, 316L, lossis tshwj xeeb cryogenic nickel steels.
Yuav tsum muaj kev tswj xyuas nruj nruj thiab cov neeg ua haujlwm txawj
Txawm hais tias S32205 yog weldable, nws tsis yog kev zam txim li 304L lossis 316L. Vuam maj mam dhau los yog nrog cov cua kub ntau dhau tuaj yeem ua rau tsim cov theem tsis xav tau uas txo cov pitting tsis kam thiab cov khoom siv kho tshuab. Tsis tas li ntawd, kev xaiv hlau tsis raug lossis tsis txaus nitrogen shielding tuaj yeem ua rau chim siab rau qhov tseem ceeb 50/50 austenite-ferrite tshuav nyiaj li cas.
Qhov no txhais tau li cas rau koj lub khw: Koj xav tau cov kws cob qhia uas nkag siab txog kev siv hlau nplaum duplex. Koj tseem xav tau kev ntsuas qhov ntsuas kub kom raug kom ntsuas qhov ntsuas kub qis dua 300℃F (150 degree). Ntau tus fabricators xav tau kev kuaj xyuas kom paub tseeb tias lawv cov txheej txheem vuam tsim cov khoom siv tau. Qhov no ntxiv lub sij hawm thiab nqi piv rau vuam txheem stainless hlau.
Muaj thiab Lub Sijhawm Lead tuaj yeem ntev dua
S32205 daim hlau yog cov khoom tshwj xeeb, tsis yog cov khoom lag luam zoo li 304 lossis 316. Txawm tias cov chaw muag khoom loj dua cov khoom sib txawv, qhov ntau thiab tsawg, cov ntsuas nyias nyias, lossis cov khoom loj yuav xav tau cov khoom siv zeb nrog cov hmoov txhuas ntawm 12-20 lub lis piam. Thaum lub sij hawm thoob ntiaj teb cov saw hlau cuam tshuam, cov qib duplex feem ntau ua nyuaj rau qhov chaw tshaj li cov qib austenitic.
Yog tias koj qhov project xav tau S32205, xaj kom zoo ua ntej thiab tuav cov khoom ruaj ntseg. Ua haujlwm nrog cov chaw muag khoom muaj npe nrov uas muaj kev sib raug zoo ntawm cov zeb. Rau kev kho sai, khaws cov khoom lag luam ntawm qhov ntau thiab tsawg lossis tsim kom muaj kev cog lus cog lus cog tseg.
Tus nqi pib siab dua 304L lossis 316L ntawm ib qho -Pound Basis
Thaum S32205 pheej yig dua ib phaus dua siab -nickel alloys, nws tseem kim tshaj tus qauv 304L thiab 316L stainless hlau. Nyob ntawm kev ua lag luam, S32205 daim hlau feem ntau raug nqi 20-50% ntau dua ib phaus dua 316L. Tus nqi siab dua no tuaj yeem cuam tshuam txog kev siv nyiaj -cov neeg yuav khoom uas tsuas yog saib tus nqi ntawm cov khoom ib phaus es tsis yog tus nqi ntawm lub neej.
Qhov tseem ceeb counterpoint: Thaum koj suav rau S32205 lub zog siab dua, kev pab cuam lub neej ntev dua vim kev tiv thaiv corrosion, thiab txo kev txij nkawm, tag nrho cov nqi ntawm cov tswv feem ntau nyiam S32205. Txawm li cas los xij, luv luv -lub sij hawm, tsis yog - cov ntawv thov tseem ceeb hauv ib puag ncig me me, 304L pheej yig dua yuav yog qhov kev xaiv nyiaj txiag zoo dua.
Tsawg Formability piv rau Austenitic Qib
Lub zog siab dua ntawm S32205 los nrog qis dua ductility. Thaum 316L tuaj yeem khoov tau, ncab, thiab sib sib zog nqus- kos nrog cov txheeb ze yooj yim, S32205 daim hlau yuav tsum muaj zog ntau dua thiab muaj kev nyab xeeb me me bending radii. Kev ua kom txias ntau dhau tuaj yeem ua rau muaj kev tsim martensite lossis tawg, tshwj xeeb tshaj yog tias cov khoom tsis nyob hauv cov tshuaj -annealed mob.
Rau nruj vojvoog khoov los yog complex tsim qhov chaw, preheat lub phaj me ntsis thiab siv loj punch radii. Nco ntsoov sab laj tus tsim cov kev txwv. Yog tias koj tus qauv tsim yuav tsum muaj kev sib sau hnyav, xav txog kev siv qib austenitic es tsis txhob, lossis npaj los daws qhov anneal tom qab tsim.
Xaus
Duplex S32205 daim hlau muab cov pob muaj zog ntawm lub zog siab, chloride corrosion kuj, thiab tus nqi -kev ua tau zoo rau cov ntawv thov ua haujlwm ntawm -50℃thiab 300 degree. Lawv zoo nyob rau hauv marine ib puag ncig, tshuaj ua, desalination nroj tsuag, thiab roj & roj chaw uas txheem stainless steels tsis vim pitting los yog kev nyuaj siab corrosion cracking.
Txawm li cas los xij, S32205 tsis yog kev daws teeb meem thoob ntiaj teb. Zam nws kom siab - qhov kev pabcuam kub siab tshaj 300℃, cryogenic tej yam kev mob hauv qab -50℃, los yog daim ntawv thov uas yuav tsum tau heev formability. Rau cov niches, austenitic stainless hlau lossis npib tsib xee-raws li alloys tseem yog qhov kev xaiv zoo dua.
