Dab tsi yog qhov txawv ntawm 309 thiab 321 stainless hlau?
Dab tsi yog qhov txawv ntawm 309 thiab 321 stainless hlau?
Ob leeg 309 thiab 321 stainless hlau yog austenitic stainless hlau haum rau siab - qhov kub thiab txias. Txawm li cas los xij, 309 muaj qhov ua tau zoo tshaj plaws ntawm cov cua sov thiab oxidation tsis kam (vim nws cov ntsiab lus chromium thiab npib tsib xee ntau dua, ua rau nws tsim nyog rau qhov chaw sov sov), thaum 321 siv titanium stabilizers los tiv thaiv weld corrosion (ua kom nws tsim nyog rau vuam dav hlau tso kav thiab siab - qhov kub thiab txias), txawm hais tias nws cov cua sov tsis zoo. Qhov sib txawv tseem ceeb ntawm ob yog tias 309 muaj ntau dua chromium thiab nickel cov ntsiab lus, ua kom nws tiv taus qhov kub thiab txias; thaum 321 siv titanium los xyuas kom meej weld kev ncaj ncees nyob rau hauv siab -kub ib puag ncig.
Dab tsi yog qhov siab tshaj plaws kub tsis kam ntawm 309 stainless hlau?
1900℃F
309 yog austenitic cua sov-cov hlau tsis muaj zog uas tuaj yeem tiv taus oxidation kub txog 1900℃F nyob rau hauv isothermal tej yam kev mob. Thaum raug kev kub ntxhov ntau zaus, qhov kev txwv sab saud ntawm lub alloy qhov kub tsis kam yog kwv yees li 1850℃F.
Dab tsi yog 309 Stainless Hlau?
309 stainless hlau yog austenitic stainless hlau alloy, qee zaum kuj hu ua Alloy 309 lossis AISI 309. Cov hlau no muaj cov ntsiab lus siab ntawm chromium thiab npib tsib xee, muab nws zoo heev corrosion kuj thiab oxidation tsis kam ntawm kub txog 1900℃F (kwv yees li 1088 degree). Nws tuaj yeem tiv taus ib puag ncig corrosive uas lwm cov hlau tsis tuaj yeem, ua rau nws zoo tagnrho rau cov ntawv thov uas yuav tsum tau ua kom ntev ntev -lub sij hawm durability thiab hnav tsis kam.
Dab tsi yog 321 Stainless Hlau?
321 stainless hlau yog austenitic chromium-nickel stainless hlau nrog zoo corrosion kuj thiab siab - kub lub zog. Nws superior oxidation kuj tso cai rau nws siv nyob rau hauv kub txog li 982℃(1800℃F) thaum tuav nws txhua yam khoom. Nws yog qhov zoo tshaj plaws rau ntau yam kev siv, suav nrog cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov tshuab hluav taws xob, thiab cov khoom siv turbine.
Kev sib piv ntawm cov tshuaj muaj pes tsawg leeg ntawm 309 thiab 321 stainless hlau
| Element | Stainless hlau 309 (UNS S30900) | Stainless hlau 321 (UNS S32100) |
|---|---|---|
| Chromium (Cr) | 22.0 – 24.0 % | 17.0 – 19.0 % |
| Nickel (Ni) | 12.0 – 15.0 % | 9.0 – 12.0 % |
| Hlau (Fe) | Tshuav | Tshuav |
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.20% | Tsawg dua lossis sib npaug li 0.08% |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 2.00% | Tsawg dua lossis sib npaug li 2.00% |
| Silicon (Si) | Tsawg dua lossis sib npaug li 1.00% | Tsawg dua lossis sib npaug li 0.75% |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.045% | Tsawg dua lossis sib npaug li 0.045% |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.030% | Tsawg dua lossis sib npaug li 0.030% |
| Titanium (Ti) | – | Ntau dua lossis sib npaug li 5 × C % (min 0.40) |
| Nitrogen (N) | – | Tsawg dua lossis sib npaug li 0.10% |
| Molybdenum (hli) | – | – |
Kev sib piv ntawm cov khoom siv kho tshuab ntawm 309 thiab 321 stainless hlau
| Khoom | Stainless hlau 309 (Annealed) | Stainless hlau 321 (Annealed) |
|---|---|---|
| Tensile zog (MPa, min) | 515 – 620 | 515 – 620 |
| Yield zog (0.2% Offset, MPa, min) | 205 – 310 | 205 – 310 |
| Elongation (% hauv 50 mm, min) | 40 | 40 |
| Hardness (Rockwell B, max) | 95 PAB | 95 PAB |
| Hardness (Brinell, max) | 217 HB | 217 HB |
| Modulus ntawm Elasticity (GPa) | 200 | 193 |
| Qhov ceev (g / cm³) | 7.98 | 8.03 |
| Melting Range (zeeg) | 1400 – 1450 | 1400 – 1425 |
| Qhov Kev Pab Cuam Siab Tshaj Plaws (Nruam, Hauv Huab Cua) | 1095 degree | 900 degree |
| Impact Strength (Charpy V-Notch, J) | Ntau dua los yog sib npaug rau 100 | Ntau dua los yog sib npaug rau 100 |
| Creep Resistance | Zoo | Zoo (Ti-stabilized) |
| Kev qaug zog | Zoo | Zoo |
| Thermal Expansion Coefficient (× 10⁻⁶/K, 20-100 degree) | 14.9 | 16.6 |
| Thermal conductivity (W / m·K, ntawm 20 degree) | 14.2 | 16.2 |
Kev sib piv ntawm cov khoom ntawm 309 thiab 321 stainless hlau:
Thaum tshav kub kub Resistance: 309 feem ntau withstands tag nrho cov kub thiab thermal cycling tshaj 321.
Weldability: Vim nws txoj kev kho titanium stabilization, 321 ua tau zoo nyob rau hauv cov khoom siv welded, ua rau nws superior rau 309 nyob rau hauv complex welded qauv ntawm qhov kub thiab txias.
Corrosion Resistance: Ob leeg muaj qhov zoo oxidation tsis kam, tab sis 309 muaj cov ntsiab lus chromium ntau dua, ua rau nws muaj txiaj ntsig zoo hauv qhov kub siab heev - qhov kub tsis yog - vuam ib puag ncig.
Cov ntawv thov raug:
309: Rauv Cheebtsam (lub cub tawg, teb kiln), kiln linings, tshav kub exchangers, industrial pa systems.
321: Aircraft pa system, afterburners, siab -kub expansion pob qij txha, cov khoom siv tshuaj.
Gnee Steel tshwj xeeb hauv kev tsim khoom ntawm ntau yam khoom siv stainless hlau. 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