Stainless hlau 316 (US tus qauv ASTM S31600, Suav tus qauv 06Cr17Ni12Mo2) yog molybdenum-muaj austenitic stainless hlau, feem ntau hu ua "marine-qib stainless hlau" vim nws zoo heev corrosion kuj. It is based on 304 stainless steel with the addition of 2-3% molybdenum (Mo), which significantly enhances its resistance to pitting and crevice corrosion.
Ⅰ.Cov yam ntxwv tseem ceeb
1.Exceptional Corrosion Resistance: Qhov sib ntxiv ntawm molybdenum muab nws qhov kev ua tau zoo tshaj plaws hauv chloride ib puag ncig (xws li dej hiav txwv, tshuaj tsuag ntsev), nrog rau pitting tsis kam tshaj li ntawm 304 stainless hlau. Nws tus nqi corrosion hauv 10% sulfuric acid tuaj yeem tsawg dua 0.1 hli / xyoo.
2.Kev ua haujlwm siab kub: Zoo kub-kub lub zog thiab oxidation tsis kam, nrog kev pab cuam txuas ntxiv mus txog 870 ° C thiab kev pabcuam cuam tshuam txog 925 ° C.
3.Mechanical Properties: Tawm lub zog ≥205 MPa, tensile zog ≥515 MPa, elongation ≥40%, muab zoo toughness thiab ua hauj lwm-hardening muaj peev xwm.
4. Low Magnetism: Tsis-sib nqus nyob rau hauv cov tshuaj-annealed xeev; tej zaum yuav ua me ntsis sib nqus tom qab ua haujlwm txias. Haum rau cov khoom siv rhiab rau magnetic teb.
Ⅱ.Chemical Composition (Key Indicators)
| Element | Cov ntsiab lus ntau | Muaj nuj nqi |
| Cov pa roj carbon (C) | ≤ 0.08% | Tswj intergranular corrosion |
| Chromium (Cr) | 16.0-18.0% | Forms passive zaj duab xis, tiv thaiv xeb |
| Nickel (Ni) | 10.0-14.0% | Stabilizes austenitic qauv, acid kuj |
| Molybdenum (Mo). | 2.0-3.0%. | Cov ntsiab lus tseem ceeb, muab pitting kuj |
| Manganese (Mn) | ≤ 2.00% | Deoxidizer |
| Silicon (Si) | ≤ 0.75% | Deoxidizer |
Ⅲ.Tej yam cuab yeej cuab tam
Chav Dej Kub Mechanical Properties (Solution-Annealed State)
Qhov no yog lub xeev ntau tshaj plaws rau 316 stainless hlau, muab qhov sib npaug zoo ntawm cov khoom.
| Khoom | Tus nqi | Standard Requirement (ASTM A240) |
| Tensile zog (Rm) | 515-620 MPa | ≥515 MPa |
| Yield zog (Rp0.2) | 205-310 MPa | ≥205 MPa |
| Elongation (A) | 40% - 50% | ≥ 40% |
| Hardness (HBW) | 149-217 : kuv | ≤ 217 |
| Elastic Modulus (E) | 193 gp ua | - |
Sau ntawv:
1. Lub zog muaj zog: Tawm lub zog nyob ib ncig ntawm 200-300 MPa, ua kom yooj yim rau kev tsim thiab txheej txheem.
2.Excellent Plasticity: Elongation feem ntau tshaj 40%, qhia tias muaj zog toughness thiab tsis kam rau nkig tawg.
3. Ua haujlwm Hardening: Lub zog thiab hardness nce ntxiv thaum lub sijhawm ua haujlwm txias (piv txwv li, txias dov, kos duab), tab sis plasticity txo.
Ⅳ.Cov Kev Pabcuam Tseem Ceeb
1. Marine Engineering: Nkoj fittings, offshore platforms, desalination khoom.
2.Chemical & Zog Kev Lag Luam: Reactors, pipelines, heat exchangers (resistant to acids/alkalis).
3.Medical & Food Industries: Cov cuab yeej siv phais, cov khoom siv tshuaj, cov khoom siv ua zaub mov (ua tau raws li cov qauv kev nyiam huv).
4.Architecture & Decoration: Lub tsev ntaub thaiv phab ntsa, railings nyob rau hauv ntug hiav txwv dej (resistant rau ntsev tsuag corrosion).
Ⅴ.Common Derived Qib
316l ua: Tsawg-carbon version (C≤0.03%), zoo weldability thiab intergranular corrosion kuj, haum rau hnyav-section welded Cheebtsam.
316 H: High-carbon version, siab kub-siab zog, haum rau high-temperature-bearing qauv.
