Qhov sib txawv ntawm 1.4878 thiab 1.4961 stainless hlau
Tso lus
Thaum xaiv stainless hlau rau siab -kub siv, engineers thiab buyers feem ntau piv EN 1.4878 (AISI 321H) thiab EN 1.4961 (AISI 347H). Txawm hais tias ob qho tib si yog austenitic cua sov-cov hlau tsis muaj zog, lawv cov qauv tsim tshuaj lom neeg, muaj peev xwm kub, thiab tus cwj pwm corrosion txawv heev. Xaiv cov qib kom raug yuav pab txo tus nqi tu, txhim kho lub neej kev pab, thiab ua kom muaj kev nyab xeeb.
Dab tsi yog1.4878 stainless hlau(AISI 321H)?
1.4878 stainless hlau (tseem hu ua AISI 321H) yog austenitic cua sov-resistant stainless hlau. Nws txhim kho kev tiv thaiv rau rhiab heev thiab intergranular corrosion los ntawm kev sib ntxiv ntawm titanium, thiab nthuav tawm cov qauv kev ruaj ntseg zoo ntawm qhov kub siab txog 850 degree. Nws yog dav siv nyob rau hauv cov cua kub tubing, tshav kub exchangers, chemical khoom, thiab pa system.
Puas yog 1.4878 tib yam li 321H?
Yog lawm, 1.4878 yog European (EN) tsim rau tib lub siab -carbon, tshav kub- resistant stainless hlau qib hu ua 321H.
Dab tsi yog 1.4961 stainless hlau?
1.4961 stainless hlau (tseem hu ua AISI 347H lossis X15CrNiSi25-21) yog cov cua sov-tiv taus austenitic stainless hlau haum rau siab -kub daim ntaub ntawv, xws li lub cub tawg tsim thiab siab - cov khoom kub. Nws muaj kev tiv thaiv oxidation zoo heev thiab siab - kub lub zog, thiab yog tsim los rau ultra-siab kub ib puag ncig mus txog 1150℃. Cov khoom no yog ib qho yooj yim rau weld, forging, thiab txias ua hauj lwm.
1.4878 stainless hlau VS . 1.4961: Tshuaj muaj pes tsawg leeg
| Qib | Cr (%) | Tsis muaj (%) | Si (%) | C (%) | Ti (%) | Lwm tus |
|---|---|---|---|---|---|---|
| 1.4878 (321H) | 17.0–19.0 | 9.0–12.0 | Tsawg dua lossis sib npaug li 0.75 | 0.04–0.10 | 5×C–0.8 | Low Mo, balanced Mn |
| 1.4961 (347H) | 24.0–26.0 | 19.0–22.0 | 1.5–3.0 | Tsawg dua los yog sib npaug li 0.20 | - | High Cr + Ni rau huab cua kub heev |
1.4878 stainless hlau VS . 1.4961: Mechanical Properties
| Khoom | 1.4878 (321H) | 1.4961 (347H) |
|---|---|---|
| Tensile zog (MPa) | 500–700 | 600–750 |
| Yield zog (MPa) | 200–300 | 250–350 |
| Elongation (%) | Ntau dua lossis sib npaug li 40 | Ntau dua lossis sib npaug li 40 |
| Hardness (HB) | Tsawg dua lossis sib npaug li 217 | Tsawg dua lossis sib npaug li 223 |
| Max. Kev Pabcuam Nruam Temp | 850 degree | 1100-1150 degree |
1.4878 vs.1.4961 Stainless hlau: Oxidation Resistance
1.4878 stainless hlau qhia tau hais tias zoo heev oxidation tsis kam, nrog oxidation poob ntawm tsawg tshaj li 0.1 mg / cm² tom qab raug ntawm 1100℃rau 1000 teev, whereas 1.4961 stainless hlau exhibits ib tug oxidation poob ntawm ib ncig ntawm 0.5 mg / cm² nyob rau hauv tib yam mob. Txawm li cas los xij, vim qhov ruaj khov austenitic qauv ntawm 1.4961, nws tswj kev ruaj ntseg microstructural zoo dua ntawm qhov kub siab, muab cov oxidation ntau dua nyob rau hauv cov huab cua sib txawv thiab xa cov kev ua tau zoo dua thaum lub sij hawm ntev - thermal cycling.
1.4878 vs.1.4961 Stainless hlau Carburization Resistance
Nyob rau hauv cov nqe lus ntawm carburization kuj, 1.4878 stainless hlau qhia superior kev ua tau zoo piv nrog rau 1.4961, feem ntau yog vim nws siab dua chromium thiab txhuas cov ntsiab lus. Hauv CO / CO₂-nplua nuj huab cua ntawm 950 degree, nws cov pa roj carbon nkag tuaj yeem raug txo kom txog li 0.05 hli / xyoo. Cov ntaub ntawv pov thawj carburizing furnace qhia tau hais tias tom qab lub sijhawm ntev, qhov tawv tawv ntawm 1.4878 stainless hlau tseem qis dua 250 HV, thaum lub hardness ntawm 1.4961 nce mus rau ntau dua 400 HV, qhia txog kev tsim ntawm coarse carbides uas yuav ua rau embrittlement.
1.4878 vs.1.4961 Stainless Steel Sensitization Behavior (Welded Condition)
Nyob rau hauv cov xwm txheej welded, 1.4878 stainless hlau tsis tshua muaj rhiab heev tshaj 1.4961. Qhov no yog vim hais tias 1.4878 muaj ib qho tseem ceeb ferritic feem, ua rau tsawg kawg nkaus chromium carbide nag lossis daus ntawm cov ciam teb ntawm 450-850℃rhiab heev. Tom qab kev laus ntawm 700℃rau 1 teev, qhov kev ua tau zoo ntawm kev ua haujlwm tsis zoo ntawm 1.4878 stainless hlau tseem qis dua 5%. Hauv qhov sib piv, 1.4961 stainless hlau yog qib austenitic tag nrho uas muaj cov pa roj carbon monoxide thiab tsis muaj cov stabilizers xws li Ti los yog Nb, ua rau nws muaj kev cuam tshuam ntau rau qhov mob hnyav.
1.4878 vs 1.4961: Tus nqi
| Qib | Kwv yees li. Nqe Ntau (ib ton) | Tus Nqi Theem |
|---|---|---|
| 1.4878 (321H) | Tus nqi nruab nrab | ★★★☆☆ (Economical) |
| 1.4961 (347H) | Tus nqi siab dua vim siab Ni & Cr | ★★★★★ (Premium siab -temp alloy) |
Yog tias koj muaj qhov yuav tsum tau ua rau 1.4878 lossis 1.4541 stainless hlau, thov koj xav tso qhov kev txiav txim. GNEE muaj cov khoom muag loj ntawm cov khoom nrov rau koj xaiv. Nws tuaj yeem ua tiav rau hauv ntau yam khoom siv, nrog rau cov phaj, coils, raj, tuav, xov hlau, thiab lwm yam. Rau cov ncauj lus kom ntxaws txog cov tshuaj muaj pes tsawg leeg thiab cov qauv dawb, thov hu rau peb lub Hoobkas tam sim ntawd. Peb muab cov nqi sib tw thiab kev pabcuam zoo heev.
