1.4404 vs 1.4547 Stainless hlau: Corrosion kuj
Tso lus
EN 1.4404 (AISI 316L) thiab 1.4547 (254 SMO®) yog ob qho tib si austenitic stainless hlau, tab sis lawv muaj qhov sib txawv ntawm kev npaj siv thiab cov peev nyiaj siv tau.
Cov kws tshaj lij kev muag khoom feem ntau sib piv ob qib ntawm cov hlau tsis muaj steel hauv cov ntawv thov hauv qab no: chloride- thaj chaw nplua nuj, thaj chaw sab nrauv lossis dej hiav txwv, cov khoom siv tshuaj lom neeg, thiab cov ntawv thov uas xav tau lub neej ntev thiab cov nqi kho mob tsawg.
Kev nkag siab txog lawv cov tshuaj muaj pes tsawg leeg, kev tiv thaiv corrosion, cov khoom siv kho tshuab, thiab tag nrho cov nqi ntawm lub neej yog qhov tseem ceeb kom tsis txhob muaj nyob rau hauv - cov lus qhia tshwj xeeb lossis kev siv nyiaj tsis tsim nyog.
Cov khoom siv EN 1.4404 yog dab tsi?
AISI 316L / EN 1.4404 yog stainless hlau austenitic nrog corrosion kuj zoo heev. Cov qib stainless hlau no muaj qhov tsis tshua muaj magnetizability, zoo heev vuam zog thiab yog haum rau txias sib sau. Cov khoom siv tuaj yeem siv rau qhov kub txog li 550 degree.
Dab tsi yog 1.4547 stainless hlau sib npaug?
1.4547 stainless hlau (tseem hu ua 254 SMO, UNS S31254, F44, 6Mo, los yog X1CrNiMoN20-18-}7) yog super austenitic stainless hlau nrog qib siab ntawm chromium, npib tsib xee, thiab molybdenum, tshwj xeeb tshaj yog rau corrosion corrosion, pitting thiab corrosion kuj. chloride-nplua nuj ib puag ncig zoo li dej hiav txwv, ua rau nws muaj kev ua tau zoo rau lwm qib zoo li 316L hauv kev xav tau.
1.4404 vs 1.4547 Stainless hlau: Qhov tseem ceeb sib txawv
1.4404 vs 1.4547 Stainless Hlau: Khoom Txheej Txheem
| Qib | Lub Npe | UNS | Qeb |
|---|---|---|---|
| 1.4404 | 316L stainless hlau | S31603 | Austenitic stainless hlau |
| 1.4547 | 254 SMO stainless hlau | S31254 | Super austenitic stainless hlau |
1.4404 vs 1.4547 Stainless hlau: Tshuaj muaj pes tsawg leeg
| Element | 1.4404 (316L) | 1,4547 (254 SMO) |
|---|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.030 | Tsawg dua los yog sib npaug rau 0.020 |
| Chromium (Cr) | 16.5 – 18.5 | 19.5 – 20.5 |
| Nickel (Ni) | 10.0 – 13.0 | 17.5 – 18.5 |
| Molybdenum (hli) | 2.0 – 2.5 | 6.0 – 6.5 |
| Nitrogen (N) | Tsawg dua lossis sib npaug li 0.10 | 0.18 – 0.22 |
| Copper (Cu) | - | 0.50 – 1.00 |
| Hlau (Fe) | Tshuav | Tshuav |
1.4404 vs 1.4547 Stainless hlau: Corrosion Resistance & PREN Sib piv
1.4547 muaj qhov zoo tshaj plaws corrosion kuj piv rau 1.4404, tshwj xeeb tshaj yog tiv thaiv chloride-induced pitting, crevice corrosion, thiab kev nyuaj siab corrosion cracking; nws PREN ~ 42–45 tso cai rau kev txhim khu kev qha hauv dej hiav txwv thiab siab - chloride txheej txheem xov xwm, whereas 1.4404 (PREN ~ 24–26) yog tsim nyog rau nruab nrab corrosive ib puag ncig, ua 1.4547 qhov kev xaiv zoo tshaj rau offshore, desalination, thiab tshuaj ua cov tshuab uas 316L yuav raug kev txom nyem ua ntej.
| Qib | Hom PREN | Chloride Resistance Level |
|---|---|---|
| 1.4404 (316L) | ~24–26 | Nruab nrab |
| 1,4547 (254 SMO) | ~42–45 | Zoo heev / Seawater-qib |
1.4404 vs 1.4547 Stainless hlau: Mechanical Properties (Hom, Annealed)
| Khoom | 1.4404 (316L) | 1,4547 (254 SMO) |
|---|---|---|
| Lub zog muaj zog (0.2%) | ~ 170 MPa | ~ 300 MPa |
| Tensile zog | 485-620 MPa | 650-750 MPa |
| Elongation | Ntau dua lossis sib npaug li 40% | Ntau dua lossis sib npaug li 35% |
| Hardness | ~ 150 HB | ~ 200 HB |
1.4404 vs 1.4547 Stainless hlau: Kub & Weldability Considerations
| Yam | 1.4404 | 1.4547 |
|---|---|---|
| Max nruam kev pab temp | ~ 400 degree | ~ 450 degree |
| Tsawg-kub toughness | Zoo heev | Zoo heev |
| Weldability | Zoo heev | Zoo heev (Nitrogen tswj) |
| Tshaj tawm -weld corrosion txaus ntshai | Nruab nrab hauv chlorides | Tsawg heev |
Vim li cas 1.4547 kim dua 1.4404?
1.4547 (254 SMO) yog kim kim tshaj 1.4404 (316L) vim hais tias nws muaj ntau dua alloying ntsiab, tshwj xeeb tshaj yog molybdenum (~ 6% vs. ~ 2.5%) thiab nitrogen, nrog rau ntau dua nickel ntsiab lus. Cov ntsiab lus no ua rau tus nqi raw khoom nce ntxiv thiab yuav tsum tau nruj dua melting, dov, thiab kev tswj kom zoo. Hauv kev xa rov qab, 1.4547 xa PREN ntawm ~ 42-45, ze li ntawm 50-60% siab dua corrosion kuj margin tshaj 316L hauv chloride ib puag ncig, uas ua pov thawj tus nqi siab dua hauv kev pabcuam tseem ceeb.
1.4547 Stainless hlau khoom
Yog tias koj muaj qhov yuav tsum tau ua rau 1.4547 stainless hlau, peb txais tos koj xaj. GNEE muaj cov khoom muag loj ntawm cov khoom nrov rau koj xaiv. Nws tuaj yeem ua tiav rau hauv ntau yam khoom siv, nrog rau cov phaj, coils, raj, tuav, xov hlau, thiab lwm yam. Rau cov ncauj lus kom ntxaws txog cov tshuaj muaj pes tsawg leeg thiab cov qauv dawb, thov hu rau peb lub Hoobkas tam sim ntawd. Peb muab cov nqi sib tw thiab kev pabcuam zoo heev.Email:info@gneestainless.com
Kev xeem thiab cov ntaub ntawv: Daim ntawv pov thawj hauv Hoobkas, EN 10204 3.1, daim ntawv qhia tshuaj, daim ntawv qhia kev siv tshuab, daim ntawv ntsuam xyuas kev puas tsuaj, tsis yog- daim ntawv ntsuam xyuas kev puas tsuaj, PMI xeem tsab ntawv ceeb toom, daim ntawv ntsuam xyuas pom, daim ntawv ntsuam xyuas thib peb, NABL daim ntawv pov thawj kuaj.
Ntim: Ntoo crate ntim, npuas qhwv ntim, steel strapping, los yog ntim raws li tus neeg yuav tsum tau muaj.
