254SMO thiab 904L Yeeb Nkab Chaw Tsim Tshuaj, Chaw Muag Khoom. Tiv tauj peb kom tau txais kev tsocai dawb thiab qauv!
Nyob rau hauv ib puag ncig muaj corrosion hnyav, super austenitic stainless hlau tau dhau los ua cov khoom tseem ceeb ntawm kev xaiv vim nws zoo heev corrosion kuj. Ntawm lawv,254 SMO thiab 904 Lyog ob tug neeg sawv cev. Txawm hais tias lawv yog ob qho tib si siab -kawg stainless hlau, lawv muaj qhov sib txawv tseem ceeb hauv kev tsim qauv thiab kev ua haujlwm zoo, uas cuam tshuam rau lawv cov xwm txheej ntawm daim ntawv thov.
Tshuaj muaj pes tsawg leeg ntawm 254smo thiab 904L
| Cov ntsiab lus | 254 SIB | 904L |
| Cr | 19.5-20.5 | 19-21 |
| Ni | 17.5-18.5 | 24-26 |
| Mo | 6.0-6.5 | 4.0-5.0 |
| Cu | 0.5-1.0 | 1.0-2.0 |
| N | 0.18-0.22 | - |
| C | Tsawg dua lossis sib npaug li 0.02 | Tsawg dua lossis sib npaug li 0.02 |
Mechanical zog sib piv ntawm 254smo thiab 904L Yeeb Nkab
Lub zog sib txawv ntawm S31254 thiab 904L
254SMO ua tiav cov kev daws teeb meem tseem ceeb ntxiv dag zog los ntawm nitrogen alloying. Nws lub zog tensile zog yog ntau tshaj 400 MPa, thiab nws lub zog tensile ntau dua los yog sib npaug rau 650 MPa, uas yog ze li ob zaug siab li 904L (yield zog ≈ 220 MPa). Kev siv 254SMO tuaj yeem txo cov phab ntsa tuab ntawm 20-30%.
ss 254smo thiab ss904L Kev kub siab ua haujlwm
Nyob rau hauv qhov kub thiab txias ntawm 300-600 degree, qhov creep kuj ntawm 254SMO yog zoo dua li ntawm 904L, tshwj xeeb tshaj yog nyob rau hauv kev nyuaj siab. Cov kev sim qhia tau hais tias lub sijhawm creep rupture ntawm 254SMO ntawm 600℃thiab 100 MPa kev ntxhov siab yog li 40% ntev dua li ntawm 904L, uas ua rau nws muaj txiaj ntsig zoo ntawm qhov kub siab kawg ntawm cov khoom siv hluav taws xob.
Kev ua tau zoo nyob rau hauv acid nruab nrab ib puag ncig ntawm stainless hlau 904L thiab 254smo
Sulfuric acid ib puag ncig ntawm Stainless hlau S31254 thiab alloy 904L
904L: 904L ua tau zoo vim nws cov nickel siab - tooj liab ua ke. Kev sim cov ntaub ntawv qhia tau hais tias nyob rau hauv 50% sulfuric acid thiab 80 degree, nws cov corrosion txhua xyoo tsuas yog 0.13 hli, qis dua 1.5 hli ntawm 316L stainless hlau. Cov yam ntxwv no ua rau nws thawj qhov kev xaiv rau sulfuric acid cia tso tsheb hlau luam thiab cov tshuaj reactor linings.
254 SIB: Tus nqi corrosion ntawm 254SMO yog li ntawm 0.25-0.4 hli / xyoo, uas yog siab tshaj 904L. Txawm li cas los xij, hauv sulfuric acid uas muaj chloride ions (xws li ntsev- muaj sulfuric acid nyob rau hauv refineries), 254SMO yog superior rau 904L vim nws cov ntsiab lus molybdenum siab. Lub sijhawm no, chloride ions rhuav tshem cov zaj duab xis passivation ntawm 904L, thaum cov yeeb yaj kiab ua kom zoo dua nitrogen ntawm 254SMO muaj zog tiv thaiv.
Hydrochloric acid thiab sib xyaw acids ntawm s254smo thiab s904L
904L:904L tuav tus nqi qis corrosion (<0.5 mm/year) through the activation of copper. Although 254SMO is not recommended for use in pure hydrochloric acid environments, it performs well in mixed acids containing oxidizing ions (such as H₂SO₄-HCl).
254 TSI:254SMO qhia tshwj xeeb qhov zoo. Nws cov chromium siab, molybdenum thiab nitrogen ua ke tuaj yeem tiv taus cov tshuaj fluoride ion corrosion, thaum 904L yog qhov yooj yim rau pitting thiab zoo corrosion nyob rau hauv xws li ib puag ncig, thiab nws daim ntawv thov yog nruj me ntsis txwv.
Chloride thiab Localized Corrosion ntawm ss31254 yeeb nkab thiab 904 stainless hlau yeeb nkab
Pitting thiab Crevice Corrosion ntawm s31254 yeeb nkab thiab 904L yeeb nkab
Tus nqi PREN ntawm 254SMO yog siab li 43, thiab qhov tseem ceeb pitting kub (CPT) hauv 6% FeCl₃ tov yog 75 degree, uas yog ntau tshaj 25℃siab tshaj 904L (CPT≈50 degree). Qhov no feature yog tshwj xeeb tshaj yog tseem ceeb nyob rau hauv seawater systems.
Stress Corrosion Cracking (SCC) ntawm alloy S31254 thiab 904L
Both have good SCC resistance in chloride-rich environments, thanks to their high nickel content (>18%). Txawm li cas los xij, 904L ua tau zoo dua hauv cov roj acidic thiab roj ib puag ncig uas muaj hydrogen sulfide vim nws cov tooj liab tuaj yeem tiv thaiv sulfide kev nyuaj siab corrosion.
Daim Ntawv Thov Matrix: Qib twg Koj Yuav Tsum Qhia?
Qhia meej 254SMO (UNS S31254) Yeeb Nkab Rau:
- Seawater intake systems, cooling loops, thiab offshore oil/gas platforms
- Flue Gas Desulfurization (FGD) scrubbers
- Pulp thiab ntawv bleach cog khoom (D & D0 theem reactors)
- Cov txheej txheem tshuaj uas muaj halides txhoj puab heev (chlorides, fluorides)
Qhia meej 904L (UNS N08904) Yeeb Nkab Rau:
- Sulfuric acid ntau lawm thiab concentration nroj tsuag
- Phosphoric acid thiab fertilizer manufacturing
- Pickling tanks thiab acid rov qab units
- Cov roj av qaub roj tubulars qhov twg H_2S tsis kam yog thawj
254SMO thiab 904L Yeeb Nkab Chaw Tsim Tshuaj, Chaw Muag Khoom
Zhengzhou Huitong Pipeline Equipment Co., Ltd. (HT PIPE)yog ib lub chaw tsim khoom thiab exporter ntawm super austenitic thiab nickel alloy khoom. Peb muab tag nrho cov pob khoom ntawm254 SMO (UNS S31254)thiab904 L (UNS N08904) NPEseamless thiab welded kav, phaj, yeeb nkab fittings, thiab kev cai ua ntej -fabricated yeeb nkab spools nrog tag nrho EN 10204 3.1 Mill Test Certificate.
Qhov Loj Loj:1/2 "NB rau 48" NB (SCH 5S rau SCH 160 / XXS)
Qauv:ASTM A312, ASTM A269, ASTM A240, ASME B16.9, B16.5
Kev Pabcuam:Txiav, beveling, PMI xeem, tsis yog -kev kuaj kev puas tsuaj (UT/RT)
Hu rau peb pab pawg engineering thiab kev muag khoom hnub no kom thov cov lus qhia ceev ceev thiab cov ntaub ntawv kev tshaj lij!
