25CR Super Duplex Stainless hlau Stainless hlau (SDSs) yog qhov siab- kev ua yeeb yam alloy tus cwj pwm ntawm kwv yees li 50% thiab 50% ferrite. Tus qauv no muab kev ua haujlwm zoo heev thiab zoo tshaj plaws rau corrosion, tshwj xeeb yog nyob rau ib puag ncig corrosion, tshwj xeeb yog qhov muaj chlorides, koom, thiab h₂s.
Nws yog txhais los ntawm cov qauv xws liASTM A789 / A790rau seamless thiab welded tubes. Feem ntau cov qib yogUNR UNS UNRT S32750.
Cov Nta Tseem Ceeb & Zoo
Tshwj kev txiav txim siab corrosion:Zoo dua rau tus qauv 316L thiab 22cr thiab 22Chl thiab 22Cle Universines, tshwj xeeb tshaj yog tawm tsam pitting, corrosion cracking (SCC).
Xav muaj zog txhua yam:Kwv yees ob zaug tawm los ntawm cov pa roj tsis huv ntawm cov hlau tsis muaj zog (piv txwv li 304, tso cai rau lub phab ntsa tshuab thuv thiab txheej txheem sib zog.
Zoo heev yaig - corrosion thiab absuction tsis taus.
Zoo tsis kam mus rau sulphide kev ntxhov siab tawg (SSC):Haum rau kev siv hauv qaub (h -}}}}} Nyob rau hauv cov qauv tshwj xeeb uas yog ISO 15156 / NACE MR0175.
Tshuaj lom neeg tshuaj lom neeg (ib txwm% hnyav)
Cov lus hauv qab no qhia txog tus qauv tshuaj lom neeg muaj kev sib xyaw ua rau tsis yog S32750.
Rooj 1: Tshuaj lom neeg muaj pes tsawg leeg (ASTM A789 / A790)
| Lub ntsiab | Cov ntsiab lus (%) | Hais lus |
|---|---|---|
| Chromium (cr) | 24.0 - 26.0 | Muab cov hauv paus tiv thaiv. |
| Npib tsib caug (ni) | 6.0 - 8.0 | Ruaj khov rau theem austenite. |
| Molybdenum (mo) | 3.0 - 4.0 | Txhim kho pitting thiab crevice corrosion tsis kam. |
| Manganese (mn) | Tsawg dua los yog sib npaug rau 1.2 | - |
| Nitrogen (n) | 0.24 - 0.32 | Qhov tseem ceeb rau kev ntxiv dag zog thiab ntsuas tus qauv theem. |
| Carbon (c) | Tsawg dua los yog sib npaug rau 0.030 | Cov pa roj carbon tsawg los tiv thaiv cov rhiab. |
| Silicon (si) | Tsawg dua los yog sib npaug rau 0.80 | - |
| Phosphorus (p) | Tsawg dua los yog sib npaug rau 0.035 | - |
| Sulphur (s) | Tsawg dua los yog sib npaug rau 0.020 | - |
| Tooj Liab (Cu) | Tsawg dua los yog sib npaug rau 0.50 | - |
| Tungsten (w) | Tsawg dua los yog sib npaug rau 0.50 | Qee cov qauv muaj w rau kev txhim kho corrosion tsis kam. |
| Hlau (FE) | Seem | - |
Neeg kho tshuab & Khoom Siv Lub Cev
Cov lus hauv qab no teev cov chav kawm hauv chav kawm - kub cov khoom siv rau cov tubular khoom thiab cov khoom tseem ceeb.
Rooj 2: Neeg kho tshuab & Khoom Siv Lub Cev
| Ntiag tug | Cov nqi raug / yuav tsum tau ua | Qauv / Mob |
|---|---|---|
| Yield zog (RP0.2), Min | 550 MPa (80 KSI) | ASTM A789 / A790 |
| Tensile Lub Zog (RM), Min | 795 MPa (115 KSI) | ASTM A789 / A790 |
| Elongation (a), min | 15 % | ASTM A789 / A790 |
| Hardness, Max | 32 HRC | ASTM A789 / A790 (raug) |
| Kev cuam tshuam cov tawv (charpy v - ItCH) | Ntau dua los yog sib npaug rau 45 j @ -46℃(-50℃f) | Feem ntau heev |
| Ceev | 7.8 G /M³ | - |
| Thermal nthuav tawm coefficiention | 13.0 x 10⁻⁶ / K (20-100 Qib) | - |
| Thermal conductivity | 14 W /Th K (20 degree) | - |
| Melting ntau | 1425 - 1475 degree | - |
Corrosion tiv thaiv tsis
Lub corrosion resistance ntawm cov stewleX hlau feem ntau yog feem ntauPitting tiv thaiv tus lej sib npaug (pren).
Pren =% cr + 3.3 x% m m mo+ 16 x% n
Rau uns s32750:
Raug Pren: 40 - 45
Qhov tseem ceeb pitting kub (CPT):Feem ntau ntau dua lossis sib npaug rau 50℃(122 Qib F) ib antm G48 txoj kev A.
Khoom Ntau Yam & Qauv
25CR SSDSS cov leeg yog tsim los ua ob qho khoom siv tsis tau thiab welded rau ntau yam kev siv.
Cov Lus 3: Cov Qauv Khoom Tib Neeg thiab Cov Kev Siv
| Khoom Yam | Tus Qauv Qauv | Txheem Npe | Cov Kev Siv Cov Ntawv Siv |
|---|---|---|---|
| Tube seamless & Yeeb Nkab | ASTM A789 / A790 | Txheem Qhov tshwj xeeb rau kev sib khi thiab welded ferritic / austenitic stainless hlau tubing rau kev pab cuam dav dav | Cov hlab ntsha siab, kev hloov pauv cua sov, txheej txheem kab. |
| Welded Tube & Yeeb Nkab | ASTM A789 / A790 | (Tib yam li saum toj no) | Cov kav dej loj dua, cov kab ntws. |
| Roj Lub teb chaws Tubular Khoom (Octg) | API 5CRA | Kev qhia tshwj xeeb rau kev corrosion - tiv taus alloy seamless hlab rau siv raws li casing, tubing Tshuag | Ntau lawm tubing, casing, thiab couplingsNyob rau hauv cov roj corrosive heev & roj zoo. |
Kev sib piv nrog lwm cov corrosion - tsis kam alloys (txheej txheem cej luam)
| Khoom Siv Khoom | Tus lej tsis yog | Raug Pren | Min paib zog (mpa) | Cov yam ntxwv tseem ceeb |
|---|---|---|---|---|
| 316L Austenicic | S31603 | ~25 | 170 | Zoo General corrosion tsis kam, muaj lub zog tsawg. |
| 22CL DUPLEX | S31803 / S32205 | ~35 | 450 | Lub zog zoo thiab corrosion tsis kam; Workhorse CRA. |
| 25CR SUPLESS X | S32750 | >40 | 550 | Lub zog siab dua & corrosion tsis kam dua 22cr. |
| Nickel Alloy 825 | N08825 | ~32 | 240 | Kev nyuaj siab heev xeb corrosion tawg. |
Daim ntawv thov tseem ceeb
Roj & Roj Kev Lag Luam:
Tube ntau lawm thiab casing rau corrosive Wells (High Coos, Chororides, thiab H₂s Moderate).
Flow kab, headers, thiab manifolds.
Subsea tshuab thiab Umbilicals.
Tshuaj lom neeg & petrochemical ua:Cov kev hloov pauv kub, cov tshuaj tiv thaiv, thiab cov piping tuav tshuaj hnyav.
Desalination & Seasater Systems:Siab - h siab ro week, dej hiav txwv cua txias roj av, thiab dej sov.
Pulp & Daim Ntawv Kev Lag Luam:Deroester thiab cov khoom sib xyaw ua ke.
Tubrog nkoj thiab ntug hiav txwv.
Cov kev txiav txim tseem ceeb
Kev Kho Cua Sov:Txhua 25CR cov khoom yuav tsum yogtov - annaledNtawm ~ ~ 1040-1100℃ua raws nraim los ntawm kev txiav txim sai sai kom ua tiav cov theem raug sib npaug thiab cov xeb tsis kam.
Fabrication:Yuav tsum tau saib xyuas kev ua tib zoo saib ntawm kev tawm tswv yim thaum tshav kub kub thaum lub sij hawm vuam kom tsis txhob muaj kev kub ntxhov (piv txwv li cov theem sigma), uas tuaj yeem txo qis thiab xeb tsis kam.
Qaub Service:Nws siv nyob rau hauv cov chaw nyob hauv qab yog yuav txwv tsis pub muaj kev nyuaj, siv kev ntxhov siab, thiab cov lus sib cav sib ceg li ib leeg ISO 15156 / MR0175.
