ASTM A790 UNS S31803 (2205) Kev ntsuasyog qhov siv ntau tshaj plawsduplex stainless hlau seamless yeeb nkab, uas muaj qhov sib npaug ferritic -austenitic microstructure. Nws ua kesiab zog, zoo heev pitting / crevice corrosion kuj, thiabsuperior stress corrosion cracking (SCC) kujnyob rau hauv chloride- ib puag ncig nplua nuj.

Lub Npe2205 Duplex Stainless Hlau
Khoom QibQauv: UNS S31803 / S32205
TxujQauv: ASTM A790 / ASME SA790
Txheej txheem: Kub-ua tiav / Txias- kos seamless
Daim ntawv pov thawj: EN 10204 3.1 / 3.2, PMI, NDT Certified

Technical Specifications

1 Chemical Composition (wt%, Max)

Lub ntsiab	C	Si	Mn	P	S	Cr	Ni	Mo	N
S31803	0.03	1.0	2.0	0.035	0.02	22.0–23.0	4.5–6.5	3.0–3.5	0.14–0.20

2 Mechanical Properties (Room Temp)

Khoom	Tus nqi
Yield zog (Rp0.2)	Ntau dua lossis sib npaug li 450 MPa
Tensile zog (Rm)	620-720 MPa
Elongation (A)	Ntau dua lossis sib npaug li 25%
Hardness	Tsawg dua lossis sib npaug li 290 HB / 32 HRC

3 Dimensions & Ntau

Nominal Loj1/2 "NB-16" NB (OD 21.3mm - 406.4mm)
Phab ntsa ThicknessSCH 5, 10, 40, 80, 160, XS, XXS
Ntev: 5.8m / 6m lossis kev cai ntev (17-40 ft random lengths)
Xaus: Plain End (PE), Beveled End (BE), NPT Threaded
NtoPickled, Sandblasted, Polished, BA, EP

Txheem seaworthyexport ntimkom muaj kev nyab xeeb kev xa khoom:
Ntim Cov Ntim: Cov kav dej ntim nrog cov hlua hlau (6-12 pcs / nras), cim nrog qib, qhov loj me, tus lej kub.
Kev Tiv Thaiv Kawg: Cov kaus mom yas (PE / BE xaus) los yog xov tiv thaiv (NPT xaus).
Moisture Barrier: qhwv hauv cov ntawv tsis muaj dej tsis muaj dej kraft lossis yas zaj duab xis.
Ntim Cov Khoom: Plywood crates / ntoo thawv rau me me; steel ncej rau loj diameters.
Kos npe: Txhua lub yeeb nkab stenciled nrog tus qauv, qib, qhov loj, tus naj npawb cua sov, logo, thiab lo lus uas peb.

Cov yam ntxwv tseem ceeb:

✅ Superior Corrosion Resistance: Resistant pitting, crevice, and SCC in seawater, brines, and acidic media (PREN Ntau dua lossis sib npaug li 35).
✅ Siab Mechanical Strength: ~ 2x tawm lub zog ntawm 316L, ua kom cov phab ntsa nyias nyias thiab txuag nqi.
✅ Nqis - Ua tau zoo: Cov ntsiab lus nickel qis dua cov qib austenitic (xws li 316L), muab tus nqi ruaj khov.
✅ Zoo Fabricability: Yooj yim rau vuam, khoov, thiab tshuab nrog cov txheej txheem kom raug.

Corronsion Resistance:Zoo heev general corrosion kuj; superior rau Qib 316 nyob rau hauv feem ntau ib puag ncig. Kev ua haujlwm zoo heev rau kev txhim kho hauv zos nrog rau kev sib tshuam, pitting thiab crevice corrosion; CPT ntawm 2205 feem ntau yog tsawg kawg yog 35℃. Cov qib kuj tseem tiv taus chloride stress corrosion cracking (SCC) ntawm qhov kub txog li 150 degree. Qib 2205 feem ntau yuav ua tau zoo nyob rau hauv ib puag ncig uas ua rau ua tsis tiav ntxov ntawm austenitic qib. Nws muaj kev tiv thaiv dej hiav txwv zoo dua li qib 316.

Thaum tshav kub kub Resistance:Txawm hais tias 2205 muaj qhov kub thiab txias oxidation tsis kam rau qib no, zoo li lwm cov duplex stainless hlau, raug kev txom nyem los ntawm embrittlement yog tuav rau lub sijhawm luv luv ntawm qhov kub siab tshaj 300 degree. Yog tias embrittled qhov no tsuas yog kho tau los ntawm kev kho kom zoo tag nrho. Duplex stainless hlau yuav luag tsis siv siab tshaj 300 degree.

Daim ntawv thov

nthuav qhia Roj & Roj
Offshore platforms, subsea pipelines, risers, flowlines
Cov khoom siv hauv lub taub dej, cov raj xa dej, cov kab dej ntsev
nthuav qhia Tshuaj Ua Haujlwm
Kub exchangers, siab hlab ntsha, reactor piping
Chloride- cov txheej txheem nplua nuj, cov nroj tsuag tshuaj dawb, cov kua qaub tuav
Qhia Marine & Desalination
Seawater txias kab, desalination cog piping (RO systems)
Shipbuilding, ntug hiav txwv infrastructure, ballast dej systems
nthuav qhia Pulp & Ntawv
Digester kab, bleach washers, dub cawv rov qab systems
qhia lwm yam
Kev ua zaub mov, tshuaj, tsim hluav taws xob (FGD systems)

FAQ

Q1: Qhov txawv ntawm S31803 thiab S32205 yog dab tsi?

A: Ob leeg yog 2205 duplex qib.S32205muaj kev tswj nruj dua ntawm nitrogen (0.17-0.22%) thiab siab dua PREN, nyiam rau kev pabcuam tseem ceeb hauv ntug dej hiav txwv / tshuaj lom neeg.S31803yog tus qauv, dav muaj qib.

Q2: S31803 puas tuaj yeem siv rau qhov kub thiab txias?

A: Kev pabcuam txuas ntxiv Tsawg dua lossis sib npaug li 300℃(572℃F). Ntev raug tshaj 300℃ua rau sigma-theem embrittlement, txo toughness.

Q3: Qhov kev xeem NDT tau ua li cas?

A: 100% Kev kuaj ultrasonic (UT)thiabEddy Current Testing (ET); Kev Ntsuas Hydrostatic(siab rau ASME B36.10);PMIrau cov ntaub ntawv pov thawj.

Q4: Puas yog vuam nyuaj?

A: SivE2209 electrodeslos yogER2209 muab tub lim. Tsis txhob siv cov cua kub ntev ntev; tsis muaj ncej-weld heat treatment (PWHT) yuav tsum tau.

Q5: Lub sijhawm ua khoom lag luam yog dab tsi?

A: Txheem qhov ntau thiab tsawg: 2-3 lub lis piam;Qhov ntau thiab tsawg: 4-6 lub lis piam. FOB Tianjin / Shanghai, Suav.

Q: PMI test yog dab tsi?
A: PMI sawv cev rau Cov Khoom Siv Zoo. Nws yog ib qho tsis yog -kev tshuaj ntsuam xyuas kev puas tsuaj los tshawb xyuas cov tshuaj muaj pes tsawg leeg ntawm qhov chaw, kom ntseeg tau tias cov kav dej xa tawm tau nruj me ntsis raws li UNS S31803 duplex stainless hlau qib. Nws yog ib qho yuav tsum tau soj ntsuam rau cov roj & roj thiab tshuaj ua haujlwm.

Yuav koom tes nrog peb li cas?

Peb qhov chaw nyob

Rm1406,14th/F No 208, Hongqi Road, Nankai Dist, Tianjin City, Suav teb

Xov tooj (WhatsApp/Wechat)

+86 16622033809

E -mail

alisa@tjshenzhoutong.com