2507 vs Zeron 100 (F55) Super Duplex Stainless Steels: Siab-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 ferrite- austenite piv ntawm ~ 50: 50. Nws boasts lub zog tawm los ntawm ntau dua los yog sib npaug rau 550 MPa thiab Pitting Resistance Equivalent Number (PREN) ntawm ~ 42, zoo tagnrho rau siab -siab load-cov kabmob Cheebtsam.Zeron 100 nta 24–26% Cr, 6–8% Ni, 0.2%, 3–8% Mo. tooj liab ntxiv (0.5-1.5% Cu). Nws PREN yog ~ 45-siab dua 2507-txhim kho qhov tsis kam rau pitting thiab crevice corrosion nyob rau hauv qaub roj (H₂S + Cl⁻) ib puag ncig. Nws lub zog tawm los yog ntau dua lossis sib npaug ntawm 550 MPa, sib piv 2507.Ob qib muab ob zaug lub zog ntawm cov qauv austenitic qib zoo li 316L, txo cov phab ntsa thickness thiab cov khoom siv rau cov qauv loj.

Yuav ua li cas lawv corrosion resistances ua nyob rau hauv cov kev pab cuam huab cua?

2507 thrives nyob rau hauv siab -siab, siab -chloride ib puag ncig: offshore roj thiab roj risers, subsea wellheads, thiab desalination cog siab hlab ntsha. Nws tiv taus pitting thiab crevice corrosion nyob rau hauv 60℃seawater thiab tolerates nruab nrab qaub roj concentrations.Zeron 100 excels nyob rau hauv ultra- ib puag ncig hnyav: tob tob qaub roj pipelines, pulp thiab ntawv bleaching systems, thiab tshuaj ua cov nroj tsuag tuav concentrated brines thiab acids. Nws cov tooj liab ntxiv txhim kho kev tiv thaiv rau sulfuric acid corrosion, thaum nws siab PREN tiv thaiv cov tshuaj chloride-vim tsis ua hauj lwm.Nyob rau hauv cyclic cua sov / txias xwm txheej, ob qib tswj lawv corrosion kuj zoo dua super austenitic qib zoo li 904L.

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

Xaiv 2507 rau siab -siab offshore load- bearing Cheebtsam: subsea valve lub cev, pipeline luj tshib, thiab offshore platform structural txhawb. Nws lub zog sib npaug thiab kev tiv thaiv corrosion ua rau nws ua haujlwm ntawm super duplex qib rau cov qauv hnyav ib puag ncig.Opt rau Zeron 100 rau ultra-cov roj qaub qaub thiab cov kua qaub chloride siv: cov khoom siv ua tiav dej tob, cov tshuaj reactor internals, thiab flue gas desulfurization systems. Nws yog qhov yuav tsum tau siv rau cov ntawv thov uas H₂S qhov siab tshaj 250 psi.

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

Zeron 100 tus nqi 20-30% ntau dua 2507 vim nws cov tooj liab sib ntxiv thiab nruj dua alloy muaj pes tsawg leeg tswj, ua rau nws xaiv hwm tsuas yog rau ultra- ib puag ncig hnyav.2507 muaj qhov weldability me ntsis zoo dua Zeron 100, zam qhov qis dua cov cua sov tawm thaum lub sij hawm vuam yam tsis muaj kev txi} ferritten {{7} sib npaug. Ob qib yuav tsum tau qis -cov txheej txheem cua sov input vuam (GTAW) thiab sib txuam super duplex muab tub lim hlau.Zeron 100 cov ntsiab lus alloy siab dua txo cov formability piv rau 2507, yuav tsum tau qeeb qeeb thiab ntau lubrication rau sib sib zog nqus nqus thiab dabtsi yog khoov cov txheej txheem.

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

Tom qab-weld pickling thiab passivation yog yuav tsum tau rau ob qib kom rov qab tau cov zaj duab xis passive thiab tshem tawm cov weld oxide nplai, uas tuaj yeem ua rau lub zos corrosion.2507 dhau lawm -tshwj xeeb rau cov kev siv me me super duplex-tus qauv duplex qib 2205 muaj kev ua tau zoo txaus ntawm tus nqi qis dua rau cov xwm txheej no, {5} siab heev {2. tus qauv hnyav chloride ib puag ncig; xaiv Zeron 100 rau ultra-cov roj qaub qaub thiab kua qaub chloride kev pabcuam.

Dab tsi yog cov ntawv thov ntawm 304L thiab 316L stainless hlau?

Yuav ua li cas ntxiv ntawm molybdenum cuam tshuam rau corrosion kuj ntawm stainless hlau?

304L thiab 316L puas tuaj yeem siv rau hauv qhov chaw siab -kub?