Stainless hlau Txheej txheem cej luam
Stainless hlau: Ib hom hlau paub txog nws cov kev tiv thaiv corrosion thiab tsis xeb, muaj tsawg kawg yog 10.5% chromium thiab ntau tshaj 1.2% carbon.
Stainless hlau yog cov khoom siv dav siv thoob plaws ntau yam kev lag luam, muaj npe nrov rau nws cov kev tiv thaiv corrosion thiab versatility. Ntawm ntau qib ntawm stainless hlau, 304, 304H, 304L, thiab 316 yog cov feem ntau, raws li tau teev nyob rau hauv ASTM A240 / A240M tus qauv rau "Chromium thiab Chromium-Nickel Stainless Steel Phaj, Sheet, thiab Sawb rau Siab Vessels thiab General. Cov ntawv thov."
Cov plaub qib no muaj nyob rau tib qeb ntawm cov hlau. Lawv tuaj yeem raug faib ua austenitic stainless hlau raws li lawv cov qauv thiab raws li 300 series chromium-nickel stainless hlau raws li lawv cov muaj pes tsawg leeg. Thawj qhov sib txawv ntawm lawv yog nyob rau hauv lawv cov tshuaj muaj pes tsawg leeg, corrosion kuj, tshav kub tsis kam, thiab daim ntawv thov teb.
Austenitic Stainless hlau: Feem ntau yog tsim los ntawm lub ntsej muag-centered cubic siv lead ua qauv (γ theem), tsis muaj hlau nplaum, thiab feem ntau ntxiv dag zog los ntawm kev ua haujlwm txias (uas tuaj yeem ua rau qee qhov sib nqus). (GB/T 20878)
Chemical Composition thiab Performance Comparison (raws li ASTM Standards)
304 Stainless hlau:
- Lub ntsiab lus tseem ceeb: Muaj kwv yees li 17.5-19.5% chromium thiab 8-10.5% npib tsib xee, nrog cov pa roj carbon tsawg (qis dua 0.07%).
- Mechanical Properties: Exhibits zoo tensile zog (515 MPa) thiab elongation (nyob ib ncig ntawm 40% los yog ntau tshaj).
304L Stainless hlau:
- Lub ntsiab lus tseem ceeb: Zoo ib yam li 304 tab sis nrog txo cov ntsiab lus carbon (hauv qab 0.03%).
- Mechanical Properties: Vim tias cov ntsiab lus qis dua, lub zog tensile yog me ntsis qis dua 304 (485 MPa), nrog rau tib elongation. Qhov qis carbon cov ntsiab lus txhim kho nws cov kev ua haujlwm vuam.
304H Stainless hlau:
- Lub ntsiab lus tseem ceeb: Cov ntsiab lus carbon feem ntau yog li ntawm 0.04% mus rau 0.1%, nrog txo manganese (txog 0.8%) thiab nce silicon (txog 1.0-2.0%). Chromium thiab nickel cov ntsiab lus zoo ib yam li 304.
- Mechanical Properties: Tensile lub zog (515 MPa) thiab elongation yog tib yam li 304. Nws muaj lub zog zoo thiab toughness ntawm qhov kub thiab txias, ua kom haum rau qhov kub thiab txias.
316 Stainless hlau:
- Lub ntsiab lus tseem ceeb: Muaj 16-18% chromium, 10-14% nickel, thiab 2-3% molybdenum, nrog cov ntsiab lus carbon qis dua 0.08%.
- Mechanical Properties: Tensile zog (515 MPa) thiab elongation (ntau tshaj 40%). Nws muaj superior corrosion kuj.
Los ntawm kev sib piv saum toj no, nws pom tseeb tias plaub qib muaj cov khoom zoo sib xws. Qhov sib txawv nyob rau hauv lawv muaj pes tsawg leeg, uas ua rau variations nyob rau hauv corrosion kuj thiab kub kuj.
Stainless hlau Corrosion Resistance thiab kub Resistance piv
Corrosion Resistance:
- 316 Stainless hlau: Vim muaj cov molybdenum, nws muaj kev tiv thaiv corrosion zoo dua li 304 series, tshwj xeeb tshaj yog tiv thaiv chloride corrosion.
- 304L Stainless hlau: Nrog nws cov ntsiab lus qis carbon, nws kuj muaj qhov zoo corrosion kuj, haum rau corrosive ib puag ncig. Nws cov kev tiv thaiv corrosion yog me ntsis qis dua 316 tab sis yog tus nqi ntau dua.
Thaum tshav kub kub Resistance:
- 316 Stainless hlau: Nws lub siab chromium-nickel-molybdenum muaj pes tsawg leeg muab cov cua sov zoo dua li 304 stainless hlau, tshwj xeeb tshaj yog nrog cov molybdenum txhim kho nws cov oxidation tsis kam.
- 304H Stainless hlau: Vim nws cov pa roj carbon ntau, tsis tshua muaj manganese, thiab siab silicon muaj pes tsawg leeg, nws kuj tuaj yeem ua kom muaj cua sov zoo ntawm qhov kub thiab txias.
Stainless hlau daim ntawv thov teb
304 Stainless hlau: Tus nqi-zoo thiab ntau yam hauv qab qib, dav siv hauv kev tsim kho, tsim khoom, thiab ua zaub mov.
304L Stainless hlau: Cov pa roj carbon tsawg ntawm 304, haum rau kev siv tshuaj lom neeg thiab kev lag luam marine, nrog cov txheej txheem ua haujlwm zoo sib xws rau 304 tab sis zoo dua haum rau cov cheeb tsam uas xav tau kev tiv thaiv corrosion ntau dua thiab cov nqi rhiab heev.
304H Stainless hlau: Siv nyob rau hauv superheaters thiab reheaters ntawm cov boilers loj, cov kav dej, cov khoom siv hluav taws xob hauv kev lag luam petrochemical, thiab lwm yam kev siv uas yuav tsum tau ua kom zoo corrosion kuj thiab kev ua haujlwm kub.
316 Stainless hlau: Feem ntau siv nyob rau hauv cov ntaub so ntswg thiab ntawv mills, hnyav kev lag luam, tshuaj ua thiab cia khoom, refinery khoom, kho mob thiab kws tshuaj, offshore roj thiab roj, marine ib puag ncig, thiab high-end cookware.
Post lub sij hawm: Sep-24-2024