Qhov txawv ntawm 304 thiab 321 stainless hlau yeeb nkab
Qhov txawv ntawm 304 thiab 321 stainless hlau yeeb nkab
Qhov sib txawv tseem ceeb ntawm 304 thiab 321 stainless hlau kav yog titanium ntxiv rau 321, uas ua rau nws ua tau zoo nyob rau hauv siab - qhov kub thiab txias ib puag ncig vim nws tiv thaiv kev tsim ntawm carbides (sensitization) uas ua rau corrosion nyob rau hauv 304. 304 yog ib tug dav - lub hom phiaj cov khoom tseem ceeb, thaum 321 ua tau zoo los yog 2℃nyob rau hauv welding. manifolds, furnace Cheebtsam, thiab kev ua tshuaj lom neeg) vim nws zoo dua creep zog thiab thermal stability.
Qhov twg zoo dua, 304 lossis 310 stainless hlau?
304 feem ntau yog siv rau hauv cov ntawv thov uas qhov kub tsis tshaj 800℃F (426 degree), thaum 310 tuaj yeem tiv taus qhov kub siab dua. Corrosion tsis kam: Ob lub stainless hlau muaj zoo heev corrosion kuj, tab sis 310 muaj ntau dua chromium thiab npib tsib xee cov ntsiab lus, yog li muab kev tiv thaiv zoo dua nyob rau hauv ntau corrosive ib puag ncig.
304 stainless hlau yeeb nkab yog ib hom yeeb nkab ua los ntawm dav - lub hom phiaj austenitic stainless hlau (304). Nws yog renowned rau nws zoo heev corrosion kuj, formability, thiab weldability, thiab yog haum rau conveying dej, zaub mov, tshuaj me me, thiab raws li cov qauv yeeb nkab. Nws yog dav siv hauv cov khoom noj khoom haus thiab dej haus, khoom siv hauv tsev, kho kom zoo nkauj hauv tsev, kev lag luam tshuaj lom neeg, thiab HVAC systems. Nws yog cov feem ntau siv thiab kev lag luam stainless hlau yeeb nkab, tab sis nws tsis haum rau hnyav corrosive ib puag ncig xws li siab -concentration chlorides lossis muaj zog txo cov kua qaub.
Stainless hlau 321 yeeb nkab yog austenitic stainless hlau yeeb nkab stabilized los ntawm kev ntxiv titanium (Ti). Nws cov txiaj ntsig tseem ceeb yog nyob rau hauv nws txoj kev ua haujlwm zoo heev rau kev cuam tshuam ntawm intergranular corrosion, tshwj xeeb tshaj yog tom qab vuam lossis siab -kub (kwv yees li 450-900 degree) kev pabcuam, zoo tiv thaiv corrosion tiv thaiv los ntawm carbide nag lossis daus. Nws ua ke zoo siab - kub lub zog thiab oxidation tsis kam, thiab feem ntau yog siv hauv cov kav dej hauv petrochemical, aerospace, automotive exhaust systems, thiab siab - kub exchangers uas yuav tsum tau vuam thiab raug rau nruab nrab - thiab siab -kub corrosive ib puag ncig. Nws yog qib nyiam ntawm cov dav dav -cov kav dej stainless hlau uas sib npaug tiv thaiv corrosion thiab kub-kub stability.
Cov tshuaj muaj pes tsawg leeg ntawm 304 stainless hlau yeeb nkab thiab 321 stainless hlau yeeb nkab
| Element | 304 Stainless hlau yeeb nkab | 321 Stainless hlau yeeb nkab |
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.08% | Tsawg dua lossis sib npaug li 0.08% |
| Silicon (Si) | Tsawg dua lossis sib npaug li 1.00% | Tsawg dua lossis sib npaug li 1.00% |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 2.00% | Tsawg dua lossis sib npaug li 2.00% |
| 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 0.03% | Tsawg dua lossis sib npaug li 0.03% |
| Chromium (Cr) | 18.0-20.0% | 17.0-19.0% |
| Nickel (Ni) | 8.0-10.5% | 9.0-12.0% |
| Titanium (Ti) | - | Ntau dua lossis sib npaug li 5 × C% |
Mechanical zog ntawm 304 thiab 321 stainless hlau kav
| Khoom | Stainless hlau 304 Tube | Stainless hlau 321 Tube |
|---|---|---|
| Tensile zog (MPa, min) | 515 | 515 |
| Yield zog (0.2% Offset, MPa, min) | 205 | 205 |
| Elongation (% hauv 50 mm, min) | 40 | 40 |
| Hardness (Rockwell B, max) | 92 PAB | 92 PAB |
| Hardness (Brinell, max) | 201 HB | 201 HB |
| Modulus ntawm Elasticity (GPa) | 193 | 193 |
| Qhov ceev (g / cm³) | 8.00 | 8.03 |
| Melting Range (zeeg) | 1400 – 1450 | 1400 – 1425 |
| Qhov Kev Pab Cuam Siab Tshaj Plaws (Nruam, Hauv Huab Cua) | 870 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 | Nruab nrab | Zoo (vim Ti stabilization) |
| Kev qaug zog | Nruab nrab | Zoo |
Cov ntawv thov ntawm 304L thiab 321 raj
| 304L - Ib txwm siv | 321 - Ib txwm siv |
|---|---|
| Cov cuab yeej siv tshuaj lom neeg rau ib puag ncig corrosive (tsis muaj chlorides hnyav) | Aircraft pa systems thiab siab -kub manifolds |
| Cov khoom siv ua zaub mov, khoom noj siv mis, brewing tank, thiab khoom siv hauv chav ua noj | Thaum tshav kub kub exchangers thiab lub cub tawg Cheebtsam raug rau cyclic siab - kub kev pab cuam |
| Cov kav dej, tso tsheb hlau luam, thiab cov khoom sib txuas welded qhov chaw tshaj tawm -weld corrosion kuj tseem ceeb | Automotive thiab petrochemical Cheebtsam ua haujlwm nyob rau hauv 400-900℃ntau yam |
| Architectural thiab structural applications qhov twg weldability thiab formability yog qhov tseem ceeb | Cheebtsam yuav tsum tau stabilization tiv thaiv rhiab heev thaum lub sij hawm ntev siab -temp exposure |
Gnee Steel kuj muab kev cai stainless hlau 304 khoom nyob rau hauv ntau qhov ntau thiab tsawg thiab specifications. Thov xa koj cov duab kos rau peb rau kev tsocai!
