1.4410 (UNS S32750 / 2507) Super Duplex Stainless Hlau Siv

Apr 03, 2026

Tso lus

1.4410 stainless hlau, feem ntau hu ua Super Duplex 2507 los yog UNS S32750, yog super duplex stainless hlau nrog sib npaug ferritic - austenitic microstructure uas muaj lub zog tshwj xeeb thiab zoo heev corrosion kuj. Nrog nws cov chromium siab, molybdenum, thiab nitrogen cov ntsiab lus, nws muab kev tiv thaiv zoo tshaj rau pitting, crevice corrosion, thiab kev ntxhov siab corrosion tawg nyob rau hauv chloride aggressive ib puag ncig, ua rau nws cov khoom ntawm kev xaiv rau feem ntau xav tau offshore, tshuaj ua, thiab desalination daim ntaub ntawv.

Txuj	Qib sib npaug
EN (Tebchaws Europe)	1.4410
ASTM / AISI (USA)	2507, UA S32750
JIS (Nyiv)	SUS329J4L
Lub Npe	Super Duplex 2507

Element	C	Si	Mn	P	S	Cr	Ni	Mo	N
Cov ntsiab lus (%)	Tsawg dua lossis sib npaug li 0.03	Tsawg dua lossis sib npaug li 0.80	Tsawg dua los yog sib npaug rau 1.2	Tsawg dua lossis sib npaug li 0.035	Tsawg dua lossis sib npaug li 0.02	24.0 - 26.0	6.0 - 8.0	3.0 - 5.0	0.24 - 0.32

Khoom	Yield zog (Rp0.2)	Tensile zog (Rm)	Elongation (A)	Hardness (HB)	Kev cuam tshuam (J)
Tus nqi	Ntau dua lossis sib npaug li 550 MPa	750 - 1000 MPa	Ntau dua lossis sib npaug li 25%	Tsawg dua lossis sib npaug li 310	Ntau dua lossis sib npaug li 80 (20 degree)

Exceptional Corrosion Resistance:Muaj tus lej siab Pitting Resistance sib npaug (PREN> 40), muab kev ua haujlwm zoo heev rau pitting, crevice corrosion, thiab kev ntxhov siab corrosion tawg nyob rau hauv qhov hnyav chloride ib puag ncig, suav nrog seawater thiab concentrated brines.

Muaj zog heev:Nws cov qauv duplex muab cov txiaj ntsig zoo heev thiab lub zog tensile, ua kom txo tau qhov hnyav thiab tus nqi ntau dua - tsim kom muaj txiaj ntsig zoo rau siab - muaj cov khoom.

Zoo Erosion thiab hnav tsis kam:Cov theem ferritic ua rau muaj kev tiv thaiv zoo tiv thaiv kev yaig- corrosion thiab abrasive hnav, tshwj xeeb tshaj yog tseem ceeb hauv kev siv siab - nrawm nrawm.

Zoo Fatigue Strength:Kev ua haujlwm qaug zog zoo dua piv rau qib austenitic, muaj txiaj ntsig zoo rau cov ntawv thov kev thauj khoom dynamic.

Offshore & Marine:Subsea pipelines, Christmas ntoo, manifolds, flowlines, seawater txias tshuab, kiv cua shafts, thiab riser systems.

Kev ua tshuaj lom neeg:Reactors, kub exchangers, kab, thiab kav dej rau corrosive acids thiab chlorides heev.

Desalination & FGD Nroj Tsuag:High-siab RO membranes, evaporator tubes, brine rhaub raj, thiab tshuab ntxhua khaub ncaws.

Pulp & Ntawv Kev Lag Luam:Cov khoom siv tshuaj tua kab mob, cov khoom siv tshuaj dawb, thiab cov tshuab tuav cov tshuaj chloride-muaj cov txheej txheem ntws.

Roj & Roj:Downhole tubing, txheej txheem cov khoom siv, thiab cov kav dej saum toj kawg nkaus hauv cov kev pabcuam qaub.

Cargo Tanks:Chemical tankers thiab cov thawv ntim cov nkoj nqa corrosive cargos.

The main differences are in alloy content and resulting performance. 2507 contains significantly higher levels of chromium (25% vs. 22%), molybdenum (4% vs. 3%), and nitrogen (0.27% vs. 0.17%), giving it a much higher PREN (typically >40 vs. ~ 34 rau 2205). Qhov no txhais tau tias muaj kev tiv thaiv corrosion zoo dua, tshwj xeeb tshaj yog nyob rau hauv qhov chaw nruj dua li cov dej hiav txwv kub (txog 60℃vs . 30℃rau 2205) lossis cov tshuaj muaj zog chlorides. Nws kuj tseem muaj zog dua txhua yam nyob rau txhua qhov kub thiab txias, nrog rau qhov muaj zog tawm los kwv yees li 20% siab dua 2205. 2507 yog xaiv rau cov mob hnyav tshaj plaws uas 2205 yuav tsis txaus.

Vuam 2507 yuav tsum muaj kev tswj xyuas nruj kom tswj tau qhov zoo tshaj plaws ntawm 50/50 ferrite-austenite tshuav nyiaj li cas thiab tiv thaiv kev puas tsuaj rau theem. Cov kev coj ua tseem ceeb suav nrog:

Siv tshaj -alloyed muab tub lim (piv txwv li, 25.10.4.L hom)

Kev tswj nruj ntawm cov khoom siv hluav taws xob (0.5-1.5 kJ / mm pom zoo)

Ua kom muaj kev tiv thaiv roj txaus (feem ntau Ar + 25-30% N₂) kom tswj cov qib nitrogen

Khaws qhov sib cuam tshuam kub hauv qab 100℃kom tsis txhob overheating

Tswj cov ncej-weld txias npaum li cas los tiv thaiv nkig intermetallic theem (sigma, chi)

Tsis txhob cuam tshuam ntev ntawm qhov kub thiab txias (600-1000 degree)

Preheating feem ntau tsis tas yuav tsum tau ua, thiab tom qab -weld kev kho cua sov tsis pom zoo

Rau kev nkag mus tas li hauv dej hiav txwv lossis lwm yam tshuaj chloride- muaj ib puag ncig, 2507 muaj kev ua tau zoo heev txog li 60℃(140℃F). Tshaj qhov kub no, qhov kev pheej hmoo ntawm pitting thiab crevice corrosion nce, thiab ntau cov ntaub ntawv alloyed (xws li super austenitic qib lossis npib tsib xee-raws li alloys) yuav tsum tau. Rau cov ntawv uas tsis yog - raus dej los yog qhov chaw uas tsis muaj chlorides, 2507 tuaj yeem siv rau qhov kub siab dua, tab sis kev saib xyuas yuav tsum tau ua kom tsis txhob cuam tshuam ntev rau qhov kub siab tshaj 300℃vim muaj kev pheej hmoo ntawm sigma theem embrittlement. Rau kev siv cov qauv ntawm qhov kub siab, cov khoom khaws cia zoo zog tab sis corrosion kuj yuav cuam tshuam.

GNEE Steel muab cov khoom zoo tshaj plaws Super Duplex 2507 (1.4410) stainless hlau hauv phaj, yeeb nkab, fittings, bar, thiab forging cov ntaub ntawv rau qhov nyuaj corrosive thiab siab - daim ntawv thov siab. Peb muab tag nrho cov ntaub ntawv traceability thiab ntawv pov thawj (EN 10204 3.1) kom ntseeg tau tias kev ua tau zoo, thiab muab cov kev pabcuam ua tiav nrog rau kev txiav, tsim, thiab kev pabcuam vuam. Yog tias koj muaj kev xav tau, thov koj xav tiv tauj peb.