2507 vs 254SMO Super Duplex vs Super Austenitic Stainless Steels: High-Strength vs Ultra- Corrosion Resistance

 

Dab tsi yog lawv cov ntsiab lus tseem ceeb thiab qhov sib txawv ntawm kev ua haujlwm tseem ceeb?

2507 muaj 24–26% Cr, 6–8% Ni, 3–5% Mo, 0.24–0.32% N, nrog lub zog tawm los Ntau dua lossis sib npaug rau 550 MPa thiab PREN ~ 42- xa ob zaug lub zog ntawm cov qauv austenitic qib, 2515%SMO nta 17.5–18.5% Ni, 6.0–6.5% Mo, 0.18–0.22% N, nrog PREN ~ 42 thiab yield zog ~ 400 MPa-muab marginally zoo chloride pitting tsis kam tshaj 2507 ntawm qhov kub thiab txias.2507's duplex qauv ua rau cov khoom siv thinner los ntawm 0-2% rau cov phab ntsa 2. tib lub nra.

Yuav ua li cas lawv corrosion resistances ua nyob rau hauv huab mob?

2507 excels nyob rau hauv siab - siab nyob rau hauv offshore thiab qaub roj ib puag ncig: subsea wellheads, pipeline risers, thiab roj refinery kab tuav H₂S thiab chloride mixtures.254SMO dominates siab -kub tshuaj chloride: 60℃dej hiav txwv reverse osmosis cov ntaub ntawv, qhov twg cov ntaub so ntswg thiab cov ntaub so ntswg. 2507 tuaj yeem pom cov cim ntawm crevice corrosion.In cyclic cua sov thiab txias qhov xwm txheej, 2507 tswj kev ruaj ntseg zoo dua qub, thaum 254SMO khaws kev tiv thaiv corrosion zoo dua.

Nyob rau hauv daim ntawv thov twg yog ib qib irreplaceable dua lwm?

Xaiv 2507 rau siab -siab load-cov khoom siv hauv cov cheeb tsam hnyav: offshore platform qauv kev txhawb nqa, siab -pressure acid txhaj kab, thiab desalination cog siab hlab ntsha.Opt rau 254SMO rau tsis yog -load-cov kabmob qhov chaw nyob rau hauv cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab lwm yam. twj impellers tuav kub concentrated brines.

Tus nqi thiab kev tsim khoom lag luam yog dab tsi- tawm ntawm ob qib?

254SMO tus nqi 20-30% ntau tshaj 2507 vim nws cov ntsiab lus molybdenum ntau dua thiab ntau cov txheej txheem ntau lawm.2507 yuav tsum tau nruj tswj ntawm vuam cua sov input kom tsis txhob sigma theem embrittlement; 254SMO muab cov weldability zoo dua nrog kev pheej hmoo qis dua ntawm ncej-weld degradation.2507 lub zog ntau dua txo cov nqi tsim khoom rau cov qauv loj, offsetting cov nqi sib txawv vs 254SMO.

Cov kev txwv tseem ceeb thiab cov txheej txheem xaiv yog dab tsi?

2507 tsis pom zoo rau kev pabcuam siab dua 300℃(kev pheej hmoo ntawm kev tsim cov theem sigma); 254SMO tuaj yeem ua haujlwm txog li 600℃nrog kev ua haujlwm ruaj khov.Ntau qib yog tus nqi- siv tau rau me me- kev siv corrosion- siv 316L lossis 2205 kom txuag tau 50–70% ntawm cov nqi khoom siv.Xaiv 2507 rau siab {{14}5} qhov chaw siab; xaiv 254SMO rau ultra{17}}hnyav siab-kub tshuaj chloride siv.