Dab tsi yog 321H Stainless Hlau?
321H stainless hlauyog titanium-stabilized austenitic stainless hlau nrog cov ntsiab lus carbon ntau dua rau kev txhim kho siab - qhov kub thiab txias.
Lub "H" sawv cev rau "High carbon," qhov txawv ntawm tus qauv 321. Cov yam ntxwv tseem ceeb suav nrog:
Titanium stabilization: Tiv thaiv chromium carbide tsim thaum vuam
Cov pa roj carbon ntau dua: Txhim kho lub zog ntawm qhov kub siab tshaj 500 degree
oxidation kuj zoo heev: Ua tau zoo hauv kev pabcuam txuas mus txog 870 degree
Cov Qauv Txheej Txheem: ASTM A240, ASME SA240, UNS S32109
Chemical Composition ntawm 321H Stainless Hlau Phaj
Nkag siab txog cov tshuaj muaj pes tsawg leeg pab ua kom txaus siab rau qhov ua tau zoo ntawm 321H. Cov muaj pes tsawg leeg ntawm ASTM A240 tus qauv suav nrog:
|
Element |
Cov ntsiab lus (%) |
|
Cov pa roj carbon (C) |
0.04 – 0.10 |
|
Chromium (Cr) |
17.0 – 19.0 |
|
Nickel (Ni) |
9.0 – 12.0 |
|
Manganese (Mn) |
Tsawg dua lossis sib npaug li 2.0 |
|
Silicon (Si) |
Tsawg dua los yog sib npaug rau 1.0 |
|
Titanium (Ti) |
Ntau dua lossis sib npaug li 5 × C cov ntsiab lus |
|
Phosphorus (P) |
Tsawg dua lossis sib npaug li 0.045 |
|
Sulfur (S) |
Tsawg dua los yog sib npaug li 0.03 |
Qhov sib ntxiv ntawm titanium stabilizes lub microstructure, tiv thaiv chromium carbide tsim raws lis ciam teb. Qhov no ua kom ntev - lub sij hawm tsis kam mus rau intergranular corrosion, tshwj xeeb tshaj yog tom qab raug kub kub.
Mechanical Properties ntawm 321H Phaj
Steel 321H daim hlau sib txuas lub zog thiab tawv, txawm tias qhov kub siab. Tej yam khoom muaj xws li:
|
Khoom |
Tus nqi |
|
Tensile zog (MPa) |
515 – 690 |
|
Yield zog (MPa) |
205 – 275 |
|
Elongation (%) |
40 – 50 |
|
Hardness (HRB) |
90 – 100 |
|
Max ua haujlwm Temp |
~ 870℃(1600℃F) |
Kev sib xyaw ua ke ntawm lub zog tensile siab, elongation, thiab thermal stability ua rau 321H daim hlau haum rau cov hlab ntsha siab, cov khoom siv hluav taws xob, thiab cov boilers muaj.
Cov khoom tseem ceeb ntawm 321H Stainless Hlau Phaj
Siab -Tsub Resistance
321H yog tsim los tswj lub zog txhua yam thiab corrosion kuj ntawm qhov kub siab, feem ntau mus txog 870℃(1600℃F). Cov pa roj carbon ntau ntxiv thiab titanium stabilization tiv thaiv rhiab heev, ua rau nws haum rau ntev - raug nyob rau hauv ib puag ncig kub.
Corrosion Resistance
Cov ntsiab lus chromium thiab nickel muab kev tiv thaiv zoo rau:
Oxidation
Cov pa kub
Cov tshuaj corrosive me me
Qhov no ua rau 321H daim hlau zoo tagnrho rau cov khoom siv tshuaj lom neeg thiab cov pa tawm.
Weldability
Tsis zoo li qee qhov siab - carbon steels, 321H daim hlau tuaj yeem welded siv cov txheej txheem txheej txheem, suav nrog:
TIG (GTAW)
MIG (GMAW)
Kuj welding
Tom qab vuam, cov khoom khaws cia nws siab -kub kev ua haujlwm thiab corrosion kuj, ua rau nws siv tau rau fabrication thiab sib dhos.
Formability
321H stainless hlau daim hlau yog ib qho yooj yim los txiav, khoov, thiab cov duab, ua kom yooj yim rau kev lag luam kev siv, xws li tso tsheb hlau luam, flanges, thiab cov khoom siv.
Kev siv ntau yam ntawm 321H Phaj
1. High-Tsev Txheej Txheem Khoom Siv
321H daim hlau fabricate reactors, furnaces, thiab kub exchangers ua hauj lwm siab tshaj 500 degree.
Lub alloy tuav lub zog thiab tiv thaiv oxidation nyob rau hauv tas li siab -kub ib puag ncig. Cov kev siv xws li petrochemical crackers, ammonia converters, thiab thermal oxidizers.
2. Aerospace thiab Jet Engine Cheebtsam
321H daim hlau tsim cov tshuab tso pa tawm, cov ntaub thaiv cua sov, thiab cov khoom siv rau lub dav hlau.
Lub teeb yuag, muaj zog, thiab oxidation- tiv taus, 321H ua haujlwm rau thermal cycling thiab vibration xav tau ntawm aerospace applications.
3. Cov cuab yeej tsim hluav taws xob
321H daim hlau tsim cov khoom siv boiler, cov raj superheater, thiab cov kav dej hauv cov tshuab fais fab.
Kev tiv thaiv rau chav oxidation thiab thermal qaug zog ua rau 321H txhim khu kev qha rau cov roj fossil thiab biomass fais fab.
4. Automotive Exhaust Systems
321H daim hlau tsim manifolds, catalytic converter vaj tse, thiab cov kav dej tso tawm.
Cov khoom tiv thaiv rov ua cua sov / cua txias thiab corrosive pa gases tsis tawg lossis thinning.
5. Welded Fabrications rau Corrosive Service
321H daim hlau tsim cov tso tsheb hlau luam, ducting, thiab piping qhov twg yuav tsum tau vuam thiab corrosion kuj tseem ceeb.
Titanium stabilization tiv thaiv "weld decay"-ib daim ntawv ntawm corrosion uas tuaj yeem tshwm sim hauv cov qib uas tsis yog- cov qib ruaj khov tom qab vuam.
Muaj Qhov Loj thiab Cov Lus Qhia Txog Kev Txiav Txim
Standard Phaj Dimensions
|
Thickness |
Dav |
Ntev |
Daim ntawv thov |
|
3-6 hli |
1000-2000 hli |
2000-6000 hli |
Sheet hlau, ducting |
|
6-20 hli |
1000-2500 hli |
2000-6000 hli |
Tank, nkoj, qauv |
|
20-50 hli |
1000-2000 hli |
2000-4000 hli |
Cov cuab yeej hnyav, siab -siab |
Nto Finish Options
2B: Txias- dov, annealed, pickled (tus qauv muaj tiav)
Tsis yog . 4: Txhuam / polished (architectural, zaub mov qib)
BA: Bright annealed (kho kom zoo nkauj, siab -purity)
Kub-Rolled: Raws li- dov, pickled (structural, hnyav industrial)
Yuav Order li cas
Thaum thov qhov kev tsocai, thov qhia:
Qhov Loj: Thickness × Dav × Length
Quantity: Daim los yog tag nrho qhov hnyav
Ua tiav: 2B, Tsis yog. 4, BA, lossis kub- dov
Ntawv pov thawj: MTR per EN 10204 3.1 (nrog rau tus qauv)
Kev Xeem: Ib qho kev ntsuas kev siv tshuab lossis kev xeb ntxiv yuav tsum tau ua
Delivery: Qhov chaw thiab hnub xav tau
Lub Sijhawm Lead: 3-6 lub lis piam rau qhov ntau thiab tsawg tsis Tshuag; cov khoom xa tuaj hauv 3-7 hnub.
Cov lus nug nquag
Q1: 321H puas tuaj yeem welded siv cov qauv txheej txheem?
A: Yog. 321H welds yooj yim siv GTAW (TIG), GMAW (MIG), lossis SMAW txheej txheem. Siv 321 lossis 347 muab cov hlau kom zoo tshaj plaws.
Q2: Puas yog 321H sib nqus?
A: Tsis yog. Zoo li lwm yam austenitic stainless hlau, 321H tsis yog -magnetic nyob rau hauv cov mob annealed.
Q3: Qhov kev pabcuam siab tshaj plaws rau 321H yog dab tsi?
A: 321H ua tau zoo hauv kev pabcuam txuas ntxiv mus txog 870℃(1600℃F) thiab kev pabcuam cuam tshuam txog 925℃(1700℃F).
Q4: 321H tiv thaiv corrosion tom qab vuam li cas?
A: Titanium nyob rau hauv cov alloy khi nrog carbon, tiv thaiv chromium depletion ntawm grain ciam teb - qhov no nres intergranular corrosion.
Q5: Puas yog 321H kim dua 304?
A: Yog lawm, feem ntau 15-25% siab dua vim titanium ntxiv thiab tshwj xeeb ntau lawm. Txawm li cas los xij, nws qhov kev ua tau zoo hauv kev thov cov ntawv thov feem ntau pom zoo rau tus nqi.
