28CR, feem ntau paub hauv kev lag luam los ntawm nws lub npe genericSuper Duplex Stainless Hlaulossis nws cov qauv tsim qauv zoo liUncution UNT S32707, yog tus nqi tshaj tawm - bead borrosion - tiv taus alloy (CRA). Nws yog tus cwj pwm los ntawm kev sib xyaw microstructure ntawm kwv yees li 50% austenite thiab 50% ferrite.
Cov qauv ntsuas no muaj kev sib xyaw ua ke ntawm lub zog siab heev thiab zoo tshaj plaws rau kev xeb, tshwj xeeb hauv cov roj & roj, thiab offshore kev lag luam.
Cov Nta Tseem Ceeb & Zoo:
Tshwj kev txiav txim siab corrosion:Zoo dua rau cov qauv duplex (2205) thiab 316L stainless hlau. Nws muaj kev tiv thaiv zoo heev rau pitting, crevice corrosion, thiab kev nyuaj siab corrosion tawg (SCC).
Muaj zog heev:Kwv yees li ob zaug ntxiv lub zog ntawm cov qauv Austenitic stainless hlau (zoo li 304/316), cia rau cov nyias nyias muaj nyias koob npav.
Kev yaig zoo heev - corrosion & absuction resistance:Qhov zoo tshaj plaws rau cov piping tshuab tuav slurries lossis siab - cov kua dej.
Zoo weldability:Yuav muab welded siv cov chaw ua haujlwm uas haum rau tsim nyog los tswj cov khoom siv hluav taws xob kom muaj txiaj ntsig zoo.
Cov Khoom Tsis Cov Ntaub Ntawv & Cov Ntaub Ntawv Txheej Txheem
Cov lus 1: Cov tshuaj lom neeg raug nplua (hnyav%)
| Lub ntsiab | Tsawg li tsawg tau | Ntau tshaj plaws | Raug / Sau Ntawv |
|---|---|---|---|
| Chromium (cr) | 26.0 | 28.0 | Thawj tus txhawb rau corrosion tsis kam. |
| Npib tsib caug (ni) | 4.5 | 6.0 | Ruaj khov rau theem austenite. |
| Molybdenum (mo) | 3.5 | 4.5 | Txhim kho pitting thiab crevice corrosion tsis kam. |
| Manganese (mn) | - | 1.50 | - |
| Nitrogen (n) | 0.30 | 0.40 | Tseem ceeb rau kev ntxiv dag zog thiab theem sib npaug. |
| Tooj Liab (Cu) | 0.50 | 1.00 | Txhim kho corrosion tsis kam nyob rau hauv sulfuric acid. |
| Tungsten (w) | 0.50 | 1.00 | Ntxiv mus rau txhim kho pitting tiv (pren). |
| Silicon (si) | - | 0.70 | - |
| Phosphorus (p) | - | 0.030 | - |
| Sulphur (s) | - | 0.020 | - |
| Carbon (c) | - | 0.030 | Cov pa roj carbon tsawg los tiv thaiv cov rhiab. |
| Hlau (FE) | Seem |
Key Parameter: Pren (Pitting Reactive Tus lej)
Pren =% cr + 3.3 x (%} x% w)+ 16 x% n
For 28Cr, the PREN typically exceeds ** >41 **, faib nws ua "superllex" qib.
Rooj 2: Cov cuab yeej siv neeg kho mob (ntawm chav sov)
| Ntiag tug | Tus nqi (raug) | Qauv / Mob |
|---|---|---|
| Lub zog tensile (RM) | Ntau dua los yog sib npaug rau 900 mpa (130 ksi) | ASTM A790 / A928 |
| Yield zog (RP 0.2) | Ntau dua los yog sib npaug rau 650 MPa (94 ksi) | ASTM A790 / A928 |
| Elongation (A5) | Ntau dua los yog sib npaug rau 15% | ASTM A790 / A928 |
| Hardness (HBW) | Tsawg dua los yog sib npaug rau 310 | Siv Annealed Annealed mob |
Rooj 3: Cov Qauv Raug Cov Qauv & Cov Lus Qhia
Cov kav dej thiab cov leeg ua los ntawm 28cr yog tsim tawm raws li cov qauv thoob ntiaj teb uas txhais tau tshuaj, tshuab, thiab kev xav tau nyob hauv.
| Khoom daim ntawv | Tus Qauv Qauv | Txheem Npe |
|---|---|---|
| Seamless Yeeb Nkab | ASTM A790 | Txheem Cov qauv tshwj xeeb rau kev sib khi thiab werred ferritic / austenitic stainless hlau yeeb nkab |
| Welded Yeeb Nkab | ASTM A928 | Txheem Cov Qauv Rau Ferritic / Austenitic (Duplex) Stainless Hlau Yeeb Nkab Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob |
| Bar & billet | ASTM A182 | Cov Qauv Txheej Txheem rau Forged lossis Rolled Alloy thiab Stainless Hlau Yeeb Nkab Flanges, Forged Fittings, thiab Li Li Qub thiab Qhov Kev Pab Kub}}}}} kub kev pab |
| Cov Khoom Siv Universal | Uncution UNT S32707 | Unified cov qauv kev tsim qauv rau qhov tshwj xeeb no. |
| Kev Tsim Xwm Europe | 1.4501 | Cov neeg European (en) cov lej. |
Cov Khoom Siv Lub Cev
Ntawj ntom:7.8 G /M³
Melting ntau yam:~ {1420 - 1460 degree
Thermal Expansion:~ 13.0 x 10⁻⁶ / k ({20 - 100 degree)
Thermal Condivity:~ 15 w / min k (ntawm 100 degree)
Modulus ntawm elasticity:Tom ntej no 200 GPA
Cov Kev Siv Cov Ntawv Siv
28CRes 28CR cov kav yog tau teev rau qhov tseem ceeb thiab kev siv cov kev pabcuam hnyav:
Roj & Roj:
Offshore Sea Sea Flow Kab & Risers
Downhole tubing & casing hauv corrosive Wells
Cov txheej txheem cov kav dej hauv cov chaw ua kom saum cov chaw ua kua nrog cov tshuaj chloride ntau ntau yam, cov ntsiab lus, thiab cov ntsiab lus ntau.
Kev Lag Luam Tshuaj Kev Lag Luam (CPI):
Piping rau kev txhoj puab accuentive, chlorides, thiab cov kuab tshuaj.
Desalination & Seasater Systems:
Siab -} siab rov qab osmosis (ro) kav dej kom txias.
Volution Tswj & FGD Systems:
Cov kev txiav txim tseem ceeb rau kev siv
Fabrication & Vuam:Yuav tsum tau cov txheej txheem nruj kom tsis txhob muaj kev tsim ntawm kev ua detrimental phales (zoo li Sigma theem) uas tuaj yeem tuaj yeem tuaj yeem tuaj yeem tuaj yeem tuaj yeem tuaj yeem tuaj yeem tuaj yeem tuaj yeem tuaj yeem siv hlau. Tshaj tawm - Weld kev kho kom sov yuav tsim nyog.
Nqi:28CR yog cov khoom siv tshaj plaws nrog tus nqi siab dua ntau dua li cov qauv hlau tsis muaj. Nws yog xaiv raws li lub neej -}}}}}}}}}}}}}}}}}}}}}} Txoj kev ua tau zoo thiab ntseeg tau ncaj qha thawj zaug.
Muaj Txaus:Nws yog qib tshwj xeeb thiab tej zaum yuav tsis muaj kev npaj tau muaj li 316l lossis 2205 duplex. Cov sij hawm ua tau ntev dua.
