Lub hauv paus rau phau ntawv
Nyob rau hauv lub ntiaj teb xav tau ntawm corrosion-resistant alloys rau cov neeg sib txawv ntawm cov neeg muaj kev sib cav sib ceg nrog cov khoom siv sib txawv, cov kev ua tau zoo, thiab txwv .
Nkag siab txog qhov sib txawv ntawm duplex Stainless Hlau F51 thiab cov kws tshaj lij, thiab muaj kev nyab xeeb, thiab tus nqi-ua hauj lwm.
Khoom Series
ASTM A182 F51 (UNRENT S31803 / S32205):
- Series: duplex stainless hlau (DSS) .
- Microstructure: Cim los ntawm ze li 50/50 sib tov ntawm ferrite () thiab Austenite () theem no yog tus yuam sij rau nws cov khoom lag luam {}}
- Tseem Ceeb Alloy Cov Ntsiab Lus: Chromium Ntau Dua (Cr: {%), thiab NEXE}
SS316 / ASTM A182 F316 (UNFENT S31600):
- Series: ustenitic stainless hlau .
- Microstructure: feem ntau muaj ib qho kev pab cuam Austenite () theem hauv kev daws teeb meem kev daws teeb meem} Cov qauv no muab cov kev nruj thiab formability.
- Tseem Ceeb Alloying ntsiab: chromium (CR<0.10%).
Cov Khoom Sib Piv: F51 vs SS316 / F316
|
Ntiag tug |
ASTM A182 F51 (DUPLEX) |
ASTM A182 F316 (ASTENTENITIC) |
Yam uas pab |
|
Tawm Zog (0.2% offset) |
~ 65 KSI (450 MPa) min |
~ 30 Ksi (205 MPa) min |
F51 (2x siab dua) |
|
Lub zog tensile |
~ 90 Ksi (620 mpa) min |
~ 75 Ksi (515 MPa) min |
F51 |
|
Hardness (Raug HB) |
~ 290 HB |
~ 170 HB |
F51 |
|
Elongation (%) |
~ 25% min |
~ 30% min |
F316 |
|
Kev Cuam Tshuam Cov Khoom Siv (Cryogenic) |
Zoo cia rau ~ {-50℃(-58℃f) |
Zoo heev rau kev qes heev cryogenic temps |
F316 |
|
Thermal nthuav dav |
Qis dua (≈ 13 μm / Mas nyoog) |
Siab dua (≈ 18 μm / Mas nyoog) |
F51 |
|
Thermal conductivity |
Siab dua |
Qi dua |
F51 |
|
Teb |
Ferromagnetic (vim ferrite) |
Tseem ceeb tsis yog kev sib nqus (annealed) |
F316 |
|
Fabrication (vuam) |
Ntau txoj kev sib zog: |
Qhov yooj yim dua: Cov txheej txheem tsim tau zoo.}}}} tsawg dua rau weld hlau teeb meem. |
F316 |
|
Nqi (Khoom) |
Siab dua: Vim tias ntau dua cr, mo, n cov ntsiab lus thiab ntau dua kev ua . |
Qi dua |
F316 |
Corrosion Resistance sib piv:
|
Ib puag ncig / nres hom |
ASTM A182 F51 (DUPLEX) |
ASTM A182 F316 (ASTENTENITIC) |
Yam uas pab |
Sau ntawv |
|
General corrosion (acids) |
Zoo tshaj |
Zoo heev |
Zoo ib yam |
Ob leeg tiv thaiv ntau yam ntawm dilute organic / inorganic acids . |
|
Pitting corrosion (pren) |
Pren 34-40 |
Pren 24-26 |
F51 (tseem ceeb) |
Pren =% cr + 3.3 Kuv%}}}}}}}}}}}}} {. |
|
Crevice corrosion |
Kev zoo tshaj |
Kev ua tau zoo tsis kam |
F51 |
F51 tus qauv duplex thiab siab pren excel nyob rau hauv nruj clevices . |
|
Chloride kev ntxhov siab corrosion (SCC) |
Zoo heev |
Ntxim nyiam |
F51 (loj) |
F51's Ruplex cov qauv inherently tsis kam tiv taus chloride shloride shloride sCc {1 degree} (140℃(140 . |
|
Sulfide Kev Nyuaj Siab Cracking (SSC) |
Zoo rau zoo (NACE MR0175 ua raws li) |
Txwv |
F51 (loj) |
F51 tau siv dav hauv qaub (H2s-muaj) roj & roj kev pab rau ib n/ ces} F316 muaj kev txwv tsis pub muaj . |
|
Corrosion qaug zog |
Siab dua lub zog muaj cov txiaj ntsig zoo dua |
Zoo |
F51 |
F51 qhov siab dua tawm lub zog muaj zog feem ntau muab kev ua kom zoo dua corrosion zoo dua . |
|
Oxidation tsis kam |
Zoo heev |
Zoo heev |
Zoo ib yam |
Ob qho tib si ua tau zoo nyob rau ntawm ntug dej kub hauv oxidizing cua . |
Cov Ntsiab Lus Ntsiab Lus Zoo Tshaj:
ASTM A182 F51 (DUPLEX):
- Tseem ceeb dua siab dua lub zog: tso cai rau kev txuag hluav taws (thinner phab ntsa) lossis cov kev ntsuas siab dua hauv cov khoom .
- Superior resistance rau pitting & corrice corrosion: tshwj xeeb tshaj yog nyob rau hauv chloride-muaj chaw ib puag ncig (tshuaj ntxuav dej), tshuaj lom neeg).
- Zoo heev rau cov chloride kev ntxhov siab corrosion cracking (SCC): ib qho kev txwv loj ntawm cov qauv Austenitics zoo li 316.
- Kev tsis zoo rau kev ntxhov siab sulfide kev tawg (SSC): Tsim nyog rau Sour Service Service (NACE MR0175 / ISO 15156).
- Qis dua thermal expansion: txo cov thermal ntxhov siab hauv cov kab ke nrog cov kev hloov pauv hloov pauv .
- Siab dua thermal conductivity: tuaj yeem muaj txiaj ntsig zoo nyob rau hauv cov ntawv thov hloov cua sov .
ASTM A182 F316 (ASTENTENITIC):
- Tus nqi qis dua: ntau cov khoom lag luam muaj txiaj ntsig zoo .
- Yooj yim fabrication & vuam: kev zam txim ntau yam, dav kev muaj kev tshaj lij vuam kev txawj ntse thiab consumables .
- Superior divility & toughness: tshwj xeeb tshaj yog thaum cryogenic kub .
- Kev muaj peev xwm zoo: Zoo dua rau cov duab ua kom zoo uas yuav tsum tau ua haujlwm tseem ceeb txias .
- Tsis muaj hlau nplaum: Qhov tseem ceeb rau qee cov ntaub ntawv siv hluav taws xob lossis MRI .
- Cov ntaub ntawv teev cov ntaub ntawv: Cov keeb kwm dav dav thiab kev paub thoob plaws kev suav tsis suav kev lag luam .
Kev txiav txim siab tseem ceeb rau kev xaiv:
{{01. Corrosion Ib puag ncig: yog chloride scc ib qho kev pheej hmoo loj? Yog qib hauv chlorides, H2s, lossis lwm yam corrosives sporosives? F51 externed ntawm no .
2. kev siv tshuab: Puas yog daim ntawv thov thov kom txo phaus / phab ntsa tuab lossis kov cov siab tshaj? F51 muaj qhov tseem ceeb tshaj plaws .
{{0 {}} kub:
- Cryogenic: F316 yog superior hauv qab -50℃({2}}℃f) {}}
- Kev nce qib: Ob leeg yog usable, tab sis F51 muaj qhov siab tshaj plaws kev pabcuam ntsuas kub (1, 425 Degree F)
- Fabrication & vuam: tuaj yeem tsim chaw tsim khoom kom zoo dua kev ua kom nruj dua rau vuam thiab kho cua sov F51? Puas yog tus neeg tsav tsheb tsim nyog tau yooj yim F316 Fabrication?
{{04. Sib Nqus Yuav Tsum: Yog tias cov khoom sib nqus tsis tseem ceeb, F316 yog qhov kev xaiv.
{5. Codes & Cov Qauv: Xyuas kom ua raws li cov kab lis kev cai tshwj xeeb (ASME B31}} F51 tau qhia meej meej hauv NACE MR0175 rau cov kev pabcuam hauv kev pabcuam; F316 muaj cov kev txwv loj heev.
Tag
Xaiv nruab nrab ntawmASTM A182 F51 thiab SS316 (A182 F316)tsis yog hais txog nrhiav ib qho kev ua kom zoo nkauj thoob ntiaj teb "zoo dua qub, tab sis hais txog xaiv cov ntawv qhia tshwj xeeb rau cov ntaub ntawv tshwj xeeb xav tau .
- Qhia kom meej Astm A182 f51 (Duplex) thaum qhov kev nthuav dav hnyav, thiab kev tswj hwm kev ua haujlwm hnyav (H2s) Yuav tsum .}
- Qhia kom meej Astm A182 F316 (Austenicic) thaum cov khoom siv sib tw ua ke, lossis cov khoom sib nqus zoo li cas rau cov neeg tsav tsheb loj dua li cov kub thiab txias
