Alloy	%	Ni	Cr	Mo	Cu	N	C	Mn	Si	P	S
254 SIB	Min.	17.5 Nws	19.5 Nws	6	0.5	0.18
Max.	18.5 Nws	20.5 ib	6.5	1	0.22	0.02 ib	1	0.8 ua	0.03 ib	0.01 ib

254 SMO Lub cev muaj zog:

Qhov ntom	8.0 g / cm3
Melting point	1320-1390 ℃

254SMO yam khoom yam tsawg kawg nkaus hauv chav tsev kub:

xwm txheej	Tensile zog Rm N Rm N/mm2	Yield zog RP0.2N / hli 2	Elongation A5%
254 SIB	650	300	35

 

Yam ntxwv:
Qhov siab ntawm molybdenum, chromium thiab nitrogen ua 254SMO muaj kev ua haujlwm zoo heev rau pitting thiab crevice corrosion kev ua tau zoo. Copper txhim kho corrosion kuj nyob rau hauv qee cov kua qaub. Tsis tas li ntawd, vim nws cov ntsiab lus siab ntawm npib tsib xee, chromium thiab molybdenum, yog li ntawd 254SMO muaj kev ntxhov siab zoo corrosion cracking kev ua tau zoo.
1.Ntau qhov kev siv ntau yam kev paub tau pom tias txawm tias qhov kub thiab txias, 254SMO hauv dej hiav txwv kuj tseem muaj zog tiv thaiv corrosion, tsuas yog ob peb hom stainless hlau nrog qhov kev ua tau zoo no.
2.254SMO xws li bleach ntawv yuav tsum tau rau zus tau tej cov acidic tov thiab cov tshuaj halide oxidative corrosion kuj thiab corrosion kuj yuav muab piv rau cov feem ntau resilient nyob rau hauv lub hauv paus alloy ntawm npib tsib xee thiab titanium alloys.
3.254SMO vim muaj cov ntsiab lus nitrogen siab, yog li nws cov khoom siv zog ntau dua li lwm hom austenitic stainless hlau yog siab dua. Tsis tas li ntawd, 254SMO kuj tseem ua kom muaj zog thiab cuam tshuam lub zog thiab zoo weldability.
4.254SMO nrog cov ntsiab lus molybdenum siab tuaj yeem ua rau nws siab dua ntawm oxidation nyob rau hauv lub annealing, uas tom qab cov kua qaub ntxuav nrog ntxhib nto tshaj li ib txwm stainless hlau yog ntau tshaj li ntxhib nto. Txawm li cas los xij, tsis muaj kev cuam tshuam rau qhov corrosion kuj ntawm cov hlau no.

 

Metallurgical qauv
254SMO yog lub ntsej muag-centered cubic lattice qauv. Txhawm rau kom tau txais cov qauv austenitic, 254SMO dav annealing nyob rau hauv 1150-1200 ℃ .Qee zaum, cov khoom siv tej zaum nrog cov kab ntawm cov hlau nruab nrab theem (χ theem thiab α-theem). Txawm li cas los xij, lawv qhov cuam tshuam lub zog thiab corrosion kuj tsis cuam tshuam rau qhov xwm txheej ib txwm muaj. Thaum muab tso rau hauv thaj tsam ntawm 600-1000 ℃, lawv tuaj yeem ua rau theem ntawm cov nag lossis daus.

 

Corrosion kuj
254SMO nrog cov ntsiab lus carbon tsawg heev, uas txhais tau hais tias qhov txaus ntshai los ntawm cua sov los ntawm carbide nag lossis daus yog tsawg heev. Txawm tias nyob rau hauv 600-1000 ℃ tom qab ib teev rhiab heev tseem muaj peev xwm Strauss los ntawm intergranular corrosion test (Strauss Test ASTMA262 txiav txim E). Txawm li cas los, vim hais tias ntawm high-alloy steel ntsiab lus. Nyob rau hauv lub saum toj no-hais kub ntau yam intermetallic theem nrog muaj peev xwm ntawm hlau nyob rau hauv lub grain ciam teb nag lossis daus. Cov sediments tsis ua rau nws tshwm sim intergranular corrosion nyob rau hauv corrosive media daim ntaub ntawv, ces, welding yuav nqa tawm yam tsis muaj intergranular corrosion.Tab sis nyob rau hauv lub tshav kub ntawm concentrated nitric acid, cov sediments tej zaum yuav tshwm sim intergranular corrosion nyob rau hauv tshav kub cuam tshuam cheeb tsam. Yog hais tias zoo tib yam stainless hlau nyob rau hauv cov tshuaj uas muaj chloride, bromide los yog iodide, nws yuav qhia pitting, crevice corrosion los yog kev nyuaj siab corrosion cracking daim ntawv los ntawm localized corrosion. Txawm li cas los xij, nyob rau qee kis, qhov muaj nyob ntawm halide yuav ua kom cov corrosion tsis zoo. Tshwj xeeb hauv cov tsis-oxidizing acid. Nyob rau hauv cov ntshiab sulfuric acid, 254SMO nrog ib tug ntau dua corrosion kuj tshaj 316 (hom stainless hlau), tab sis nrog abated corrosion kuj piv rau 904L (NO8904) stainless hlau nyob rau hauv siab concentrations. Nyob rau hauv sulfuric acid uas muaj chloride ions, 254SMO nrog lub peev xwm loj tshaj plaws corrosion kuj.The 316 tsis tuaj yeem siv rau stainless hlau hauv hydrochloric acid vim nws yuav tshwm sim hauv zos corrosion thiab uniform corrosion, tab sis 254SMO tuaj yeem siv rau hauv diluted hydrochloric acid nyob rau hauv dav dav. , uder cheeb tsam ciam teb tsis tas yuav txhawj txog corrosion tshwm sim. Txawm li cas los xij, peb yuav tsum sim kom tsis txhob muaj qhov sib txawv. Nyob rau hauv cov tshuaj fluoride silicate (H2SiF4) thiab hydrofluoric acid (HF), corrosion kuj ntawm zoo tib yam stainless hlau yog txwv heev, thiab 254SMO yuav siv tau nyob rau hauv ib tug dav heev kub thiab concentration.

 

Siv teb:
254SMO yog cov khoom siv ntau lub hom phiaj tuaj yeem siv rau hauv ntau daim ntawv thov kev lag luam:
1. Petroleum, petrochemical khoom, petro-chemical khoom, xws li cov twj tso kua mis.
2. Pulp thiab ntawv bleaching khoom, xws li pulp ua noj, bleaching, ntxuav lim siv nyob rau hauv lub chim thiab lub tog raj kheej siab rollers, thiab hais txog.
3. Fais fab nroj tsuag flue roj desulphurization khoom, kev siv ntawm lub ntsiab qhov chaw: lub nqus ntauwd, flue thiab nres phaj, sab hauv, tshuaj tsuag system.
4. Nyob rau hauv lub hiav txwv los yog dej hiav txwv ua tshuab, xws li fais fab nroj tsuag siv dej hiav txwv kom txias lub nyias-walled Condenser, desalination ntawm hiav txwv dej ua cov cuab yeej, yuav siv tau txawm tias cov dej yuav tsis ntws nyob rau hauv lub ntaus ntawv.
5. Desalination industries, xws li ntsev los yog desalination khoom.
6. Thaum tshav kub kub exchanger, tshwj xeeb tshaj yog nyob rau hauv lub chaw ua hauj lwm ntawm chloride ion.