Corrosion kuj ua tau zoo ntawm 904L alloy stainless hlau daim hlau nyob rau hauv ib puag ncig hnyav
Corrosion kuj ua tau zoo ntawm 904L alloy stainless hlau daim hlau nyob rau hauv ib puag ncig hnyav
904L stainless hlau phaj nthuav tawm zoo heev corrosion kuj, tshwj xeeb tshaj yog nyob rau hauv muaj zog txo acids (xws li sulfuric thiab phosphoric acids) thiab chloride - nplua nuj ib puag ncig. Vim nws cov nickel siab, molybdenum, thiab tooj liab cov ntsiab lus, nws cov kev ua tau zoo tshaj ntawm 316L thiab 317L qib stainless hlau. Txawm tias nyob rau hauv dej hiav txwv thiab siab - qhov kub thiab txias, nws tiv taus pitting corrosion, crevice corrosion, thiab kev nyuaj siab corrosion cracking (SCC), ua rau nws zoo tagnrho rau kev ua tshuaj, desalination, thiab marine daim ntaub ntawv uas txheem stainless hlau tsis txaus. Nws cov ntsiab lus carbon tsawg kuj ua kom zoo weldability thiab tsis kam rau intergranular corrosion.
904L stainless hlau tiv thaiv corrosion li cas?
Nws cov ntsiab lus tooj liab siab txhim kho nws txoj kev tiv thaiv kom muaj zog txo cov kua qaub (tshwj xeeb tshaj yog sulfuric acid, phosphoric acid, acetic acid, thiab lwm yam organic acids), thaum lub siab nickel thiab molybdenum cov ntsiab lus muab kev tiv thaiv zoo heev rau chloride-induced stress corrosion cracking thiab pitting corrosion.
904L alloy (UNS N08904) yog super austenitic stainless hlau phaj tsim los muab nruab nrab rau siab zog corrosion kuj nyob rau hauv ntau yam txheej txheem ib puag ncig. Cov ntsiab lus siab ntawm chromium thiab npib tsib xee, nrog rau qhov sib ntxiv ntawm molybdenum thiab tooj liab, ua kom nws zoo rau kev tiv thaiv corrosion zoo heev.
Nrog nws cov alloy siab muaj pes tsawg leeg -25% npib tsib xee thiab 4.5% molybdenum-904L alloy phaj qhia tau zoo tiv thaiv chloride kev nyuaj siab corrosion cracking, pitting corrosion, thiab dav corrosion, tshaj 316L thiab 317L molybdenum-txhim kho stainless hlau.
904L alloy phaj yog Ameslikas tsim rau kev tiv thaiv rau dilute sulfuric acid ib puag ncig. Nws kuj pom zoo corrosion kuj rau lwm yam inorganic acids (xws li kub phosphoric acid) thiab feem ntau cov organic acids.
904L alloy phaj yog yooj yim weldable thiab tuaj yeem ua tiav siv cov txheej txheem kev cob qhia fabrication.
Tshuaj muaj pes tsawg leeg ntawm 904L stainless hlau phaj
| Qib | C | Mn | Si | P | S | Cr | Mo | Ni | Cu |
| 904L | 0.020 max | max 2.00 Nws | max 1.00 Nws | 0.040 max | 0.030 max | 19.00 – 23.00 | 4.00-5.00 Nws | 23.00 – 28.00 | 1.00 – 2.00 |
904L Stainless Hlau Phaj Mechanical Properties
Yam muaj nuj nqis ntawm 68℃F (20 degree) (qhov tsawg kawg nkaus tshwj tsis yog tau teev tseg)
|
Yield zog |
Qhov kawg Tensile |
Elongation |
Hardness |
||
|---|---|---|---|---|---|
| psi (min.) | (MPa) | psi (min.) | (MPa) | % (min.) | (max.) |
| 31,000 | 220 | 71,000 | 490 | 36 | 70-90 Rockwell IB |
904L stainless hlau phaj yog ib qho ultra- carbon qis, siab - alloy austenitic stainless hlau tsim rau hnyav corrosive ib puag ncig. Nws muaj kev tiv thaiv corrosion zoo dua li 316L thiab 317L, thaum ntsuas tus nqi thiab kev ua haujlwm rau tus nqi siab -kev ua tau zoo. Vim qhov sib ntxiv ntawm 1.5% tooj liab, nws pom zoo corrosion kuj los txo cov acids xws li sulfuric thiab phosphoric acids. Nws kuj qhia tau zoo heev tiv thaiv kev ntxhov siab corrosion cracking, pitting corrosion, thiab crevice corrosion tshwm sim los ntawm complex ions, thiab muaj zoo kuj rau intergranular corrosion. Nyob rau hauv ntshiab sulfuric acid nrog ib tug concentration ntawm 0-98%, 904L steel daim hlau yuav siv tau ntawm kub txog li 40 degrees Fahrenheit.
Nyob rau hauv cov kua qaub ntshiab nrog ib tug concentration ntau ntawm 0-85%, nws corrosion kuj zoo heev. Nyob rau hauv industrially tsim phosphoric acid los ntawm cov txheej txheem ntub dej, impurities ho cuam tshuam corrosion kuj. Nyob rau hauv ntau yam acids, corrosion kuj ntawm 904L super austenitic stainless hlau yog superior rau cov zoo tib yam stainless hlau. Hauv kev ua kom muaj zog oxidizing nitric acid, corrosion kuj ntawm 904L stainless hlau yog qis dua li ntawm high-alloy steels tsis muaj nyiaj. Nyob rau hauv hydrochloric acid, kev siv 904L stainless hlau daim hlau yog txwv rau qis concentrations ntawm 1-2%.
Nyob rau hauv cov kua qaub ntshiab nrog ib tug concentration ntau ntawm 0-85%, nws corrosion kuj zoo heev. Nyob rau hauv industrially tsim phosphoric acid los ntawm cov txheej txheem ntub dej, impurities ho cuam tshuam corrosion kuj. Nyob rau hauv ntau yam acids, corrosion kuj ntawm 904L super austenitic stainless hlau yog superior rau cov zoo tib yam stainless hlau. Hauv kev ua kom muaj zog oxidizing nitric acid, corrosion kuj ntawm 904L stainless hlau yog qis dua li ntawm high-alloy steels tsis muaj nyiaj. Nyob rau hauv hydrochloric acid, kev siv 904L stainless hlau daim hlau yog txwv rau qis concentrations ntawm 1-2%.
Gnee Steel tshwj xeeb hauv kev tsim khoom ntawm ntau yam khoom siv hlau stainless. Gnee Steel cov khoom ntim khoom suav nrog: Hlau Strapping: Cov kav dej nrog ib txoj kab uas hla ntawm 3 ntiv tes los yog tsawg dua yog feem ntau khi ua ke nrog polypropylene zaj duab xis los tiv thaiv xeb thaum thauj dej hiav txwv, thiab tom qab ntawd khi nrog cov hlua hlau. Ntoo Cases / Crates: Cov kav dej feem ntau yog ntim rau hauv cov rooj ntoo lossis cov thawv los tiv thaiv cov kav dej thaum lub sij hawm thauj mus los, tshwj xeeb tshaj yog cov uas ntev dua los yog muaj qhov loj dua. Seaworthy Export Ntim: Cov neeg muag khoom feem ntau siv cov txheej txheem seaworthy export ntim, uas tuaj yeem suav nrog ntau yam khoom siv thiab cov txheej txheem los tiv thaiv cov kav dej thaum thauj. Tarpaulin Ntim: Qhov no tiv thaiv los nag, dej hiav txwv, thiab lwm yam sab nraud los ntawm kev nkag mus rau lub thawv xa khoom thaum thauj. Gnee Steel tshwj xeeb hauv kev tsim thiab muag cov ntaub ntawv alloy. Gnee Steel cov khoom siv dav siv hauv aerospace, tshuaj, hluav taws xob, tsheb, thiab hluav taws xob nuclear, thiab peb tuaj yeem muab cov khoom siv alloy customized raws li cov neeg siv khoom xav tau. Rau cov khoom siv alloy pricing lossis customized alloy cov ntaub ntawv daws teeb meem, thov hu rau peb rau ib qho kev tsocai:ru@gneesteelgroup.com