Dab tsi yog cov ntawv thov kev lag luam ntawm 1.4537?

Mar 18, 2026

Tso lus

1.4537 stainless hlau, feem ntau hu ua Alloy 27-7Mo los yog UNS S31277, yog ib tug hwm super austenitic stainless hlau nrog tshwj xeeb siab molybdenum thiab nitrogen cov ntsiab lus. Nws sawv cev rau qib kev ua tau zoo tshaj plaws ntawm 6% molybdenum super austenitic qib, muab kev ua haujlwm zoo rau pitting, crevice corrosion, thiab kev ntxhov siab corrosion tawg nyob rau hauv qhov hnyav tshaj plaws chloride ib puag ncig. Nrog nws cov optimized muaj pes tsawg leeg, nws txuas cov kev sib txawv ntawm cov qauv super austenitic qib thiab kim npib tsib xee-raws li alloys, ua rau nws zoo tagnrho rau cov feem ntau xav tau seawater desalination, offshore, tshuaj ua, thiab kev siv cov pa phem.

Txuj	Qib sib npaug
EN (Tebchaws Europe)	1.4537
ASTM / AISI (USA)	Alloy 27-7Mo, UNS S31277
Lub Npe	Alloy 27-7Mo, S31277

Element	C	Si	Mn	P	S	Cr	Ni	Mo	N
Cov ntsiab lus (%)	Tsawg dua lossis sib npaug li 0.02	Tsawg dua los yog sib npaug li 0.8	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua lossis sib npaug li 0.03	Tsawg dua lossis sib npaug li 0.01	20.0 - 22.0	26.0 - 28.0	6.5 - 8.0	0.30 - 0.40

Khoom	Yield zog (Rp0.2)	Tensile zog (Rm)	Elongation (A)	Hardness (HB)
Tus nqi	Ntau dua lossis sib npaug li 350 MPa	700 - 900 MPa	Ntau dua lossis sib npaug li 35%	Tsawg dua lossis sib npaug li 260

Exceptional Pitting thiab Crevice Corrosion Resistance:Nrog PREN (Pitting Resistance Equivalent Number)> 45, nws muaj kev tiv thaiv zoo tshaj hauv cov tshuaj chloride ib puag ncig, nrog rau cov dej hiav txwv kub txog 60℃thiab cov tshuaj hypochlorite.

Zoo heev Stress Corrosion Cracking (SCC) Resistance:Ua tau zoo heev nyob rau hauv tensile kev nyuaj siab nyob rau hauv corrosive ib puag ncig uas tus qauv austenitic thiab txawm ntau super austenitic qib yuav ua tsis tau.

Siab zog thiab zoo formability:Muab cov khoom muaj zog ntau dua li cov qib qib austenitic thaum tuav cov ductility zoo thiab weldability.

Txhim kho Weldability:Optimized muaj pes tsawg leeg nrog tswj cov qib nitrogen ua kom zoo weldability thaum tswj corrosion kuj nyob rau hauv weld cheeb tsam.

Seawater Desalination:Rov qab osmosis (RO) daim nyias nyias, siab - cov kav dej siab, cov kav dej evaporator, thiab cov tshuab cua sov brine.

Offshore & Marine:Thaum tshav kub kub exchangers, twj, li qub, subsea Cheebtsam, thiab seawater cooling systems.

Kev ua tshuaj lom neeg:Cov khoom siv los tuav cov kua qaub, chlorides, thiab oxidizing media nyob rau hauv qhov chaw hnyav tshaj plaws.

Pollution Control:FGD (Flue Gas Desulfurization) systems, scrubbers, thiab ducting nyob rau hauv siab -chloride ib puag ncig.

Pulp & Ntawv:Cov khoom siv bleaching thiab digesters hauv ib puag ncig chlorine dioxide.

Roj & Roj:Cov khoom siv sab saum toj thiab hauv qab hiav txwv hauv cov kev pabcuam qaub qaub heev.

Alloy 27-7Mo sawv cev rau ib qho kev txhim kho nyob rau hauv 6% molybdenum super austenitic tsev neeg. Thaum 254 SMO (1.4547) feem ntau muaj PREN 42-44, Alloy 27-7Mo ua tiav PREN> 45 los ntawm ntau dua molybdenum (txog 8%) thiab nitrogen (txog 0.40%) cov ntsiab lus. Qhov no txhais tau hais tias muaj kev tiv thaiv zoo tshaj plaws rau pitting thiab crevice corrosion nyob rau hauv qhov chaw nruj heev, tshwj xeeb tshaj yog nyob rau qhov kub siab. Nws kuj tseem muaj zog txhua yam ntau dua li cov qauv 6% Mo qib. Alloy 27-7Mo feem ntau xaiv rau cov ntawv thov hnyav tshaj plaws uas yuav tsum muaj qhov siab tshaj pitting tsis kam thiab qhov twg tus qauv 6% Mo qib yuav yog marginal.

Vuam Alloy 27-7Mo yuav tsum tau ua tib zoo tswj kom muaj kev tiv thaiv corrosion tshwj xeeb. Cov kev coj ua uas pom zoo suav nrog kev siv ntau tshaj - alloyed muab tub lim hlau (xws li Alloy 625, Alloy 59, lossis siab dua -qib nickel-raws li fillers) kom ntseeg tau tias thaj chaw weld tswj kev tiv thaiv corrosion piv rau lub hauv paus hlau. Kev tswj xyuas nruj ntawm cov khoom siv hluav taws xob (0.5-1.5 kJ / mm) yog qhov tseem ceeb kom tsis txhob muaj cov txheej txheem intermetallic ntau dhau. Kev tiv thaiv zoo nrog nitrogen ntxiv (feem ntau Ar + 2-3% N2) pab tswj cov ntsiab lus nitrogen hauv cov hlau vuam. Interpass kub yuav tsum khaws cia qis dua 100 degree. Kev ntxuav tom qab vuam yog qhov tseem ceeb, thiab kev xaiv / passivation yuav tsum tau ua los kho cov txheej txheem passive.

Rau kev nkag mus tas li hauv cov dej hiav txwv lossis cov chloride ib puag ncig, Alloy 27-7Mo muaj kev ua haujlwm zoo txog li 60℃(140℃F), nrog rau qee cov ntawv thov ua tiav ntawm qhov kub siab dua. Rau cov ntawv uas tsis yog - raus dej, nws tuaj yeem siv txog li 300 degree, txawm hais tias yuav tsum tau saib xyuas nrog rau lub sijhawm ntev ntawm qhov kub siab. Nws cov ntsiab lus nickel siab ua kom muaj zog zoo ntawm qhov kub thiab txias. Cov alloy tswj cov khoom zoo txhua yam thoob plaws qhov kub thiab txias ntawm -196℃txog 300 degree.

GNEE Steel muab cov khoom zoo tshaj plaws super austenitic Alloy 27-7Mo (1.4537 / UNS S31277) stainless hlau hauv phaj, yeeb nkab, bar, thiab cov ntaub ntawv haum rau cov kev xav tau tshaj plaws corrosive thiab marine daim ntaub ntawv. Peb muab tag nrho cov ntaub ntawv traceability thiab ntawv pov thawj (EN 10204 3.1) kom ntseeg tau tias kev ua tau zoo. Yog tias koj muaj kev xav tau, thov koj xav tiv tauj peb.