Stainless hlau 316L phajyog ib qho qis-carbon, molybdenum- txhim kho austenitic alloy renowned rau nws superior corrosion kuj, tshwj xeeb weldability, thiab lub zog nyob rau hauv huab cua kub. Nws cov kev siv tseem ceeb tshaj plaws hauv kev tsim kho marine, kev ua tshuaj lom neeg, kev tsim tshuaj, khoom siv kho mob fabrication, khoom noj khoom haus, roj thiab roj systems, thiab architectural tej yaam num.

Qhov kev xaiv "L" (tsawg carbon, Tsawg dua lossis sib npaug li 0.03% C) tshem tawm qhov kev xav thaum lub sijhawm vuam, ua rau nws mus - rau cov khoom siv phaj nyob qhov twg ntev - lub sij hawm kev ncaj ncees nyob rau hauv ib puag ncig aggressive yog tsis yog -negotiable.
Nkag siab txog 316L Stainless Hlau
Ua ntej tshuaj xyuas cov ntawv thov tshwj xeeb, nws yog qhov tseem ceeb kom nkag siab tias yog vim li cas 316L stainless hlau phaj sawv sib nrug ntawm lwm qib alloy. Kev xaiv cov khoom siv hauv engineering yeej tsis yog qhov xav tau; txhua yam hauv cov hlau ua haujlwm rau lub hom phiaj txhob txwm ua.
Tshuaj muaj pes tsawg leeg
316L stainless hlau yog txhais los ntawm ASTM A240 thiab sib npaug thoob ntiaj teb cov qauv. Nws muaj pes tsawg leeg muab ib tug meej tshuav ntawm corrosion kuj, mechanical zog, thiab fabrication yooj:
|
Element |
Qhov hnyav% |
Element |
Qhov hnyav% |
|
Chromium (Cr) |
16.0 – 18.0 |
Molybdenum (hli) |
2.0 – 3.0 |
|
Nickel (Ni) |
10.0 – 14.0 |
Cov pa roj carbon (C) |
Tsawg dua lossis sib npaug rau 0.030 (L-qib) |
|
Manganese (Mn) |
Tsawg dua lossis sib npaug li 2.00 |
Silicon (Si) |
Tsawg dua lossis sib npaug li 0.75 |
|
Phosphorus (P) |
Tsawg dua lossis sib npaug li 0.045 |
Sulfur (S) |
Tsawg dua lossis sib npaug li 0.030 |
|
Hlau (Fe) |
Tshuav |
Nitrogen (N) |
Tsawg dua lossis sib npaug li 0.10 |
Table 1. Tshuaj muaj pes tsawg leeg ntawm 316L stainless hlau ib ASTM A240.
Lub luag haujlwm ntawm Txhua Qhov Tseem Ceeb Alloying Element
Chromium (16-18%):Ua ib tug passive chromium oxide txheej rau ntawm qhov chaw, ua raws li thawj daim thaiv tiv thaiv oxidation thiab corrosion. Qhov no tus kheej -kho zaj duab xis regenerates instantly thaum raug oxygen.
Nickel (10-14%):Stabilizes austenitic microstructure, txhim khu ductility thiab toughness, thiab txhim kho kev ua tau zoo ntawm cryogenic thiab siab kub.
Molybdenum (2-3%):Lub ntsiab lus sib txawv ntawm Qib 304 thiab Qib 316. Molybdenum ua rau muaj kev tiv thaiv zoo rau pitting thiab crevice corrosion, tshwj xeeb tshaj yog nyob rau hauv chloride- nplua nuj ib puag ncig xws li seawater lossis tshuaj ua dej ntws.
Cov pa roj carbon tsawg (tsawg dua lossis sib npaug rau 0.030%):Lub npe 'L' txwv cov pa roj carbon monoxide rau 0.030% siab tshaj plaws, tiv thaiv chromium carbide nag lossis daus ntawm cov ciam teb thaum vuam (sensitisation). Qhov no khaws cia corrosion kuj nyob rau hauv tshav kub- thaj chaw cuam tshuam yam tsis tas yuav tsum tau ncej-weld annealing.
Ntsiab Mechanical & Physical Properties
|
Khoom |
Tus nqi (Annealed) |
Txuj |
|
Tensile zog (min) |
485 MPa (70 ksi) |
ASTM A 240 Cov Lus Qhia |
|
Yield zog (min) |
170 MPa (25 ksi) |
ASTM A 240 Cov Lus Qhia |
|
Elongation (min) |
40% |
ASTM A 240 Cov Lus Qhia |
|
Hardness (max) |
217 HB / 95 HRB |
ASTM A 240 Cov Lus Qhia |
|
Qhov ntom |
7.99 g/m² |
- |
|
Melting Range |
1375 - 1400 degree |
- |
|
Thermal conductivity |
16.3 W / m·K ntawm 100 degree |
- |
|
Pitting Resistance sib npaug (PREN) |
24 – 27 |
PREN=Cr + 3.3Mo + 16N |
Rooj 2. Mechanical thiab lub cev muaj zog ntawm 316L stainless hlau phaj (annealed mob).
Primary Industries & Applications ntawm 316L Stainless Hlau Phaj
Cov ntu hauv qab no qhia txog yim qhov tseem ceeb tshaj plaws ntawm daim ntawv thov rau 316L stainless hlau phaj, piav qhia meej vim li cas cov hlau no raug xaiv los ntawm lwm txoj hauv kev.

Marine & Offshore Engineering
316L stainless hlau phaj yog cov khoom siv rau cov chaw hauv dej hiav txwv. Seawater yog ib qho ntawm cov xov xwm corrosive tshaj plaws uas tau ntsib hauv engineering, sib txuas cov tshuaj chloride ions, yaj cov pa oxygen, cov kab mob lom neeg, thiab cov neeg kho tshuab yaig.
Cov ntsiab lus 2-3% molybdenum nce Pitting Resistance Equivalent Number (PREN) rau 24-27, piv rau 304's PREN ntawm 18-22. A PREN saum toj no 24 yog kev lag luam - tau txais kev lees paub rau cov tshuaj chloride uas tau txais kev tiv thaiv nyob rau hauv txaws- cheeb tsam thiab submerged marine daim ntaub ntawv.

Cov ntawv thov marine ib txwm muaj xws li:
Nkoj hulls, nkoj deck fittings, thiab structural bulkheads
Offshore roj platform taug kev, tes tuav, thiab lawj plating
Subsea pipeline flanges thiab siab- nkoj cladding
Desalination cog siab hlab ntsha thiab evaporator cladding
Chaw nres nkoj infrastructure: pontoons, mooring hardware, ntaiv
Ib qho kev xav tseem ceeb: nyob rau hauv cov dej hauv dej los yog qhov tob tob, 316L tseem tuaj yeem pom cov pitting ntawm cov tshuaj chloride siab. Super- qib duplex (piv txwv li, 2507) muab cov txiaj ntsig PREN siab dua, tab sis 316L muab qhov zoo tshaj plaws ntawm cov nqi thiab kev ua tau zoo rau feem ntau ntawm kev siv marine.
Chemical Processing & Petrochemical Kev Lag Luam
Cov nroj tsuag tshuaj yog txhais los ntawm ib txhij muaj kev tawm tsam, qhov kub thiab txias, thiab kev ntxhov siab ntawm kev sib tsoo . 316L stainless hlau phaj ua tau raws li cov kev xav tau no nrog kev sib xyaw ntawm cov khoom uas feem ntau lwm cov alloys tsis tuaj yeem sib piv ntawm tus nqi sib piv.

Nws qhov kev tiv thaiv nthuav dav thoob plaws chemical spectrum:
Phosphoric acid (H₃PO₄) nyob rau hauv nruab nrab concentrations thiab kub
Acetic acid, lactic acid, thiab lwm yam organic acids nyob rau hauv dilute - mus rau - nruab nrab concentrations
Dilute sulfuric acid thiab sulfurous ib puag ncig
Chloride- muaj cov txheej txheem ntws hauv qab li ntawm 60 degree
Sodium thiab potassium hydroxide daws
Cov khoom siv txheej txheem feem ntau yog tsim los ntawm 316L phaj suav nrog cov hlab ntsha, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov kav dej, thiab cov kav dej. Qhov qis - carbon specification yog qhov tseem ceeb ntawm no: cov txheej txheem cov cuab yeej feem ntau yog teb-welded nyob rau hauv seem, thiab rhiab heev nyob rau hauv tshav kub- tej thaj chaw cuam tshuam yuav ua rau muaj kev puas tsuaj rau lub sij hawm ntev - kev ncaj ncees ntawm lub tank los yog lub nkoj siab.
Pharmaceutical Manufacturing & Biotechnology
Kev tswj hwm kev ua raws cai tsav xaiv cov khoom siv hauv kev tsim tshuaj ntau dua li lwm yam kev lag luam. Lub US Food and Drug Administration (FDA), European Medicines Agency (EMA), thiab thoob ntiaj teb Kev Tswj Xyuas Zoo (GMP) ua haujlwm tag nrho cov ntaub ntawv tswj hwm uas yuav tsis muaj paug cov khoom lag luam los ntawm leaching, corrosion khoom tso tawm, lossis microbial chaw nres nkoj.

316L stainless hlau phaj ua tiav cov kev xav tau los ntawm ntau yam khoom siv hauv qab no:
Electropolishable nto: 316L ua tiav Ra Tsawg dua lossis sib npaug ntawm 0.5 μm nto roughness, tiv thaiv microbial adhesion thiab ua kom yooj yim huv-Hauv-Qhov chaw (CIP) thiab Chav-Hauv -Qhov chaw (SIP) txheej txheem
Chemical inertness mus rau cov tshuaj solvents thiab excipients
Kev tiv thaiv rau lub voj voog kom tsis muaj menyuam (121-134℃autoclave tej yam kev mob)
Qhov tsawg kawg nkaus ion leaching, tseem ceeb rau kev txhaj tshuaj formulations
Cov cuab yeej siv tshuaj tsim los ntawm 316L phaj suav nrog cov hlab ntsha bioreactor thiab plhaub, lyophiliser (khov- tshuab ziab khaub ncaws) chav, cov txheej txheem tso tsheb hlau luam rau cov khoom siv tshuaj nquag (APIs), purified dej (PW) thiab dej rau txhaj tshuaj (WFI) tso tsheb hlau luam, thiab huv si -cham phab ntsa cladding.
Kev lag luam kws tshuaj thoob ntiaj teb hloov mus rau ib leeg - siv bioreactors tsis tau hloov chaw 316L - cov hlau tseem tsis tau hloov pauv rau cov khoom loj - ntim cov txheej txheem mus tas li thiab cov tso tsheb hlau luam sib npaug.
Kev ua zaub mov & dej haus
Kev tiv thaiv kev kis kab mob, kev tu lub voj voog nruj, thiab kev ua raws cai (FDA 21 CFR Part 177, EU Txoj Cai 10/2011) hais kom xaiv cov khoom siv hauv kev ua zaub mov. 316L stainless hlau phaj yog cov khoom xaiv hla cov khoom noj khoom haus thiab dej haus vim nws tsis yog -reactive} tsis zoo, tsis muaj kua qaub, thiab cov zaub mov tsis zoo {6} tshuaj ntxuav.

Cov ntawv thov zaub mov thiab dej haus muaj xws li:
Brewing nkoj, fermentation tanks, thiab ci npias tso tsheb hlau luam hauv breweries thiab distilleries
Cov khoom siv mis nyuj ua: pasteurisers, cais, thiab cheese-ua vats
Nqaij thiab nqaij nruab deg ua cov rooj, conveyors, thiab chilling tanks
Txiv lws suav muab tshuaj txhuam, kua txiv hmab txiv ntoo, thiab cov khoom noj khoom haus ua cov hlab ntsha
Conveyor system side-cov vaj huam sib luag hauv cov chaw siv cov tshuaj chlorinated tu
Cov ntsiab lus molybdenum ntawm 316L yog qhov tseem ceeb hauv cov ntsiab lus no. Ntau cov zaub mov- cov chaw ua haujlwm siv cov tshuaj chlorinated detergents thiab tshuaj tua kab mob rau CIP cycles. Nyob rau hauv tus qauv 304 stainless hlau, chloride nres tuaj yeem pib pitting tsis pub dhau lub lis piam . 316L muab qhov txiav txim siab txog kev nyab xeeb, ua kom cov cuab yeej siv tau ntev thiab txo tus nqi ntawm cov tswv cuab.
Cov cuab yeej siv kho mob tsim khoom & cov cuab yeej phais mob
316L stainless hlau yog cais raws li cov khoom siv biocompatible raws li ISO 10993 thiab ASTM F138 (rau cog- cov ntawv thov qib). Nws biocompatibility muab tau los ntawm qhov ruaj khov, tsis yog -reactive passive oxide txheej thiab nws cov ion qis- tso tawm tus nqi hauv physiological saline (simulated lub cev kua).

Kev kho mob thiab phais daim ntawv thov ntawm 316L phaj suav nrog:
Orthopedic implant substrates: pob txha daim hlau, cov khoom siv ntawm tus txha caj qaum, thiab cov khoom siv kho mob
Cov khoom siv phais phais, cov pob tawb kom tsis muaj menyuam, thiab cov cuab yeej ntsuas
Cov txee kho mob thiab lub laub cladding hauv cov chaw ua yeeb yam thiab ICUs
MRI-tshaj tsis yog- cov khoom sib nqus sib nqus (316L tsis muaj zog paramagnetic nyob rau hauv cov mob annealed)
Lub tsev kho mob phab ntsa thiab qab nthab panels nyob rau hauv ib puag ncig tsis muaj menyuam
Thaum titanium alloys thiab cobalt-chromium alloys tau hloov 316L ncaj qha- tiv tauj ntev- lub sij hawm cog qoob loo (vim muaj kev tiv thaiv corrosion zoo dua), 316L tseem yog tus ua haujlwm ntawm kev kho mob fabrication thiab luv luv - rau - nruab nrab.
Roj, Gas & Zog Infrastructure
Kev lag luam roj thiab roj ua rau qee qhov kev pabcuam hnyav tshaj plaws rau cov khoom siv: kev sib xyaw ua ke ntawm hydrogen sulfide (H₂S), CO₂, chlorides, kev kub ntxhov, thiab kub caij tsheb kauj vab. Thaum super-duplex thiab npib tsib xee alloys (Alloy 625, Alloy 825) raug xaiv rau qhov chaw loj tshaj plaws downhole, 316L phaj ua haujlwm tseem ceeb hauv cov khoom siv saum npoo thiab sab saum toj.

Kev siv roj thiab roj muaj xws li:
Wellhead manifold Cheebtsam thiab ntsuas tubing flanges
Separator nkoj cladding thiab sab hauv trim nyob rau hauv ntau lawm separators
Gas sweetening unit Cheebtsam hauv amine kho tshuab
Refinery txheej txheem piping thiab cua sov-exchanger plhaub phaj hauv hydrocarbon kwj
LNG cog cryogenic cia tank sab hauv plhaub (316L khaws ductility rau -196 degree)
Cryogenic kev ua tau zoo yog qhov tshwj xeeb tseem ceeb kom zoo dua. Tsis zoo li cov pa roj carbon steel thiab ferritic stainless hlau, uas dhau mus rau cov khoom siv hluav taws xob - mus rau - kev hloov pauv ntawm qhov kub thiab txias, austenitic 316L tseem nyob hauv cov kua nitrogen qhov kub, ua rau nws tseem ceeb rau LNG cov chaw thiab cov kev tshawb fawb cryogenic.
Architecture, Construction & Urban Infrastructure
Cov qauv zoo nkauj thiab ntev - lub sij hawm durability yog ib qho tseem ceeb nyob rau hauv kev siv architectural . 316L stainless hlau phaj yog nyiam tshaj 304 nyob qhov twg cov qauv yuav raug rau cov ntug hiav txwv dej, muaj kuab paug huab cua, los yog de- icing ntsev.

Architectural applications muaj xws li:
Facade cladding vaj huam sib luag ntawm ntug hiav txwv siab -cov tsev nce siab
Cov neeg taug kev choj cov qauv hauv marine lossis chaw lag luam
Txoj kev cladding thiab structural liners nyob rau hauv txoj kev thiab rail tunnels
Lub pas dej da dej ib puag ncig thiab dej - cov yam ntxwv
Pej xeem sculpture thiab monumental installations yuav tsum tau ntev - lub sij hawm aesthetic kev ncaj ncees
Handrails, balustrades, thiab curtain phab ntsa systems nyob rau hauv kev loj hlob ntawm waterfront
Architects thiab specifiers feem ntau yuam kev 304 rau qhov sib npaug rau 316L hauv ntug dej hiav txwv tej yaam num. Chloride-induced tshuaj yej-staining thiab nto pitting ntawm 304 installations nyob rau hauv 500 m ntawm ntug hiav txwv dej yog zoo-cov ntaub ntawv, whereas kom raug teev thiab khaws cia 316L installations qhia kev pab nyob rau hauv ntau tshaj 50 xyoo nrog negligible degradation.
Kev Kho Dej & Desalination
Cov txheej txheem kho dej siv cov khoom siv tshuaj lom neeg: cov dej haus chlorinated, cov dej khib nyiab uas muaj cov organic acids thiab ammonia, thiab - hauv cov nroj tsuag desalination - cov tshuaj ntsev ntsev ntau heev.

316L phaj yog dav teev rau:
Municipal water treatment clarifier mechanisms thiab tank phab ntsa
Chlorination contact chambers hauv cov nroj tsuag dej haus
Rov qab osmosis (RO) siab hlab ntsha casings hauv desalination chaw
Cov dej khib nyiab npog npog thiab cov khoom siv ua cov sludge
Kev siv tshuaj lom neeg rau coagulants, flocculants, thiab biocides
Kev Ntsuam Xyuas Kev Sib Piv: 316L vs. Lwm Qib
Xaiv cov qib stainless hlau zoo yuav tsum nkag siab txog kev lag luam -offs ntawm kev ua tau zoo, nqi, thiab fabricability. Cov kev sib piv hauv qab no hais txog qib feem ntau - kev txiav txim siab xaiv engineers ntsib.
316L vs . 304 / 304L: Kev sib piv tseem ceeb tshaj plaws
|
Khoom |
316L |
304 / 304L |
Kev pom zoo |
|
Molybdenum |
2–3% |
Tsis muaj |
316L rau chloride ib puag ncig |
|
PREN (Pitting Index) |
24–27 |
18–22 |
316L rau marine / tshuaj siv |
|
Chloride Resistance |
Superior |
Nruab nrab |
316L nyob rau hauv 5 km ntawm ntug dej hiav txwv |
|
Weldability |
Zoo heev |
Zoo heev |
Sib npaug - xaiv los ntawm ib puag ncig |
|
Tus nqi khoom siv |
20-35% siab dua |
Lub hauv paus |
304L rau kev siv sab hauv tsev qhuav |
|
Biocompatibility |
Raws li ISO 10993 |
Tsis ntsuas rau implants |
316L rau kev kho mob / khoom noj |
|
Cryogenic Service |
Rau -196 degree |
Rau -196 degree |
Kev ua tau zoo sib npaug |
Table 3. Direct khoom sib piv: 316L stainless hlau vs. Qib 304/304L.
316 vs . 316L: Vim li cas Carbon Difference Matters
|
Parameter |
316 |
316L |
Kev cuam tshuam |
|
Cov ntsiab lus carbon |
Tsawg dua lossis sib npaug li 0.08% |
Tsawg dua lossis sib npaug li 0.030% |
316L: tsis muaj ncej-weld anneal xav tau |
|
Sensitization Risk |
Tam sim no tshaj 425 degree |
Tsis tsim nyog |
316L nyiam rau welded fabrications |
|
Yield zog |
~ 205 MPa |
~ 170 MPa |
316 rau siab static loads |
|
Corrosion hauv HAZ |
Ua tau yam tsis muaj PWHT |
Tsis yog qhov teeb meem |
316L rau cov khoom siv |
|
High-Temp Service (>500 degree) |
Nyiam |
Tsawg tsim nyog |
316 rau cov khoom siv hluav taws xob |
Table 4. Qib 316 vs. 316L: qhov tseem ceeb sib txawv thiab kev taw qhia kev xaiv.
316L vs. Duplex 2205 thiab Super-Duplex 2507
Rau cov tshuaj chloride hnyav heev - offshore ntau lawm, seawater heat exchangers, subsea processing - duplex thiab super-duplex qib muab ntau dua PREN qhov tseem ceeb (2205: PREN ~ 35; 2507: PREN ~ 43) thiab ntau dua tensile zog. Txawm li cas los xij, 316L khaws qhov zoo hauv:
Vuam yooj yim: duplex thiab super-duplex yuav tsum tau nruj dua cov cua sov input tswj
Kev tsim thiab machining: qis zog ntawm 316L txo cov cuab yeej siv
Tsawg-kub toughness: duplex qib muaj ntau dua ductile- rau- nkig hloov kub
Muaj thiab lub sijhawm ua haujlwm: 316L phaj yog nyob deb ntau cov khoom lag luam thoob ntiaj teb
Chav tsev tus nqi: 316L feem ntau yog 40-60% qis dua ib tonne tshaj 2205
Raws li cov qauv, ntawv pov thawj & ua raws
Cov khoom siv traceability thiab cov qauv kev ua raws li kev cai lij choj thiab kev lag luam tseem ceeb heev . 316L stainless hlau phaj yog them los ntawm cov txheej txheem dav dav ntawm cov qauv thoob ntiaj teb:
|
Txheem lub cev |
Lub npe |
Scope |
|
ASTM International |
A240 / A240M |
Phaj, ntawv, thiab sawb rau cov hlab ntsha siab |
|
ASTM International |
A276 / A276M |
Bar thiab duab (rau kev sib piv siv) |
|
EN (Tebchaws Europe) |
EN 10088-2 (1.4404) |
Cov khoom lag luam tiaj tus rau lub hom phiaj dav dav |
|
ASME |
SA-240 Hom 316L |
Boiler thiab Pressure Vessel Code, Tshooj II |
|
ISO |
TS EN ISO 15510 |
Kev sib xyaw thiab kev tsim qauv |
|
JIS (Nyiv) |
SUS 316L |
Japanese Industrial Standards sib npaug |
|
GB (Tuam Tshoj) |
06Cr17Ni12Mo2 |
Suav teb tus qauv sib npaug |
Table 5. Cov txheej txheem thoob ntiaj teb tswj hwm 316L stainless hlau phaj.
Cov ntaub ntawv ntsuam xyuas cov ntaub ntawv (MTRs) rau EN 10204 3.1 lossis 3.2 yog xav tau rau cov cuab yeej siv siab (PED ua raws Europe), ASME-cov hlab ntsha coded, thiab cov ntawv thov tshuaj - qib. Nco ntsoov txheeb xyuas tus lej xov tooj cua sov thaum qhia txog 316L phaj rau kev nyab xeeb - cov khoom tseem ceeb.
Fabrication, Vuam & Nto Finishing
316L stainless hlau phaj tuaj yeem welded los ntawm tag nrho cov txheej txheem fusion vuam txheej txheem: GTAW (TIG), GMAW (MIG), SMAW (stick), SAW (submerged arc), thiab PAW (plasma arc). Cov ntsiab lus qis carbon tshem tawm qhov xav tau rau kev tshaj tawm -welding annealing hauv feem ntau daim ntawv thov.
Recommended filler metals: AWS ER316L (TIG/MIG) or E316L-16 (SMAW). Rau cryogenic lossis siab -purity tshuaj daim ntawv thov, siv tsawg-ferrite los yog tswj-ferrite filler specifications los xyuas kom meej weld-hlau toughness thiab corrosion kuj txuam nrog lub hauv paus phaj.
Kev xyaum vuam tseem ceeb: tswj kev sib cuam tshuam- dhau qhov kub qis dua 150℃thiab tsis txhob muaj cov cua kub ntau dhau (tsawg dua lossis sib npaug li 1.5 kJ / mm rau cov ntu nyias) kom txo qis HAZ rhiab heev txaus ntshai thiab tswj kev tiv thaiv corrosion ntawm weld seams.
Nto Finish Options
|
Ua kom tiav |
Rau (μm) |
Tej kev siv |
|
Tsis yog . 1 (Kub Rolled) |
Ntau dua lossis sib npaug rau 3.0 |
Cov qauv, cov hlab ntsha siab, cov tso tsheb hlau luam |
|
Tsis yog . 2D (Cold Rolled) |
0.5–1.0 |
General fabrication, chemical khoom |
|
Tsis yog . 2B (Cold + Skin Pass) |
0.1–0.5 |
Khoom noj khoom haus, lub teeb architectural cladding |
|
Tsis yog . 4 (Txhim kho) |
0.2–0.8 |
Khoom noj khoom haus, tes tuav, pom qhov chaw |
|
Tsis yog . 8 (Daim iav) |
< 0.05 |
Architectural nta, hniav panels |
|
Electropolished (EP) |
Tsawg dua los yog sib npaug rau 0.5 (post-EP) |
Pharmaceutical, semiconductor, biotech - ntsib GMP |
Table 6. 316L stainless hlau phaj nto tiav thiab cov ntawv thov raug.
Passivation
Tom qab fabrication thiab vuam, 316L cov khoom yuav tsum tau passivated rau ASTM A967 lossis ASTM A380. Citric acid passivation (20-25% kev daws ntawm 50℃rau 20 feeb) yog nce ntxiv raws li cov txheej txheem nitric acid ib txwm vim muaj kev pheej hmoo ntawm ib puag ncig thiab cov neeg ua haujlwm kev nyab xeeb. Passivation restores thiab txhim khu lub passive chromium oxide txheej ntawm machined, tsim, los yog welded nto, maximizing corrosion kuj ua ntej cov khoom siv.
Cov lus nug nquag nug (FAQ)
Cov lus nug hauv qab no sawv cev rau cov lus nug ntau tshaj plaws tau txais los ntawm engineers, buyers, thiab project managers txog 316L stainless hlau phaj.
Yog lawm, rau feem ntau ntawm cov ntawv thov dej hiav txwv . 316L's PREN ntawm 24–27 thiab molybdenum cov ntsiab lus muab kev ntseeg tau zoo nyob rau hauv cov dej hiav txwv txaws thaj tsam thiab kev sib tshuam sib sib zog nqus. Txhawm rau kom tsis tu ncua puv rau hauv dej hiav txwv ntws ntawm qhov kub siab, super- qib duplex muab kev tiv thaiv zoo tshaj. Kev tiv thaiv Cathodic tuaj yeem ua ke nrog 316L rau cov qauv hauv dej mus tas li.
Tau. 316L yog FDA 21 CFR Part 177-ua raws, EU Txoj Cai 10/2011-ua raws, thiab ua tau raws li NSF/ANSI 51 rau cov khoom noj khoom haus. Tsis muaj. 2B lossis electropolished tiav yog pom zoo kom ua tau raws li tus qauv tsim qauv. Tsis tu ncua passivation tswj cov txheej txheem oxide tiv thaiv.
Rau kev pabcuam txuas ntxiv, 316L raug ntsuas rau kwv yees li 870℃hauv qhov tsis yog -sensitising. Txawm li cas los xij, qib qis carbon feem ntau nyiam tshaj 900℃tsuas yog tias thermal cycling tsawg heev. Rau kev ua haujlwm siab - qhov kev pabcuam kub siab tshaj 800 degree, xav txog Qib 309S lossis 310S rau kev ua haujlwm zoo oxidation.
Tsis yog, nyob rau hauv feem ntau ib puag ncig. Tus kheej -kho cov yeeb yaj kiab passive oxide muab kev tiv thaiv corrosion tsis muaj txheej txheej. Nyob rau hauv cov xwm txheej heev (muaj kuab heev muaj huab cua ua ke nrog lub cev abrasion), epoxy lossis PVDF txheej yuav ntxiv cov txheej txheem passive. Painting 316L feem ntau yog counterproductive - txheej tsis ua hauj lwm ntxiab ya raws thiab accelerates localized corrosion hauv qab txheej.
Austenitic stainless hlau, suav nrog 316L, muaj qhov ua tau zoo dua rau hydrogen embrittlement dua qib ferritic lossis martensitic vim yog FCC siv lead ua qauv. Txawm li cas los xij, kev pabcuam siab -siab hydrogen yuav tsum tau ua tib zoo xav txog hydrogen-pab tawg, thiab alloy specification yuav tsum ua raws li NACE MR0175/ISO 15156 cov cai rau cov ntawv thov kev pabcuam qaub.
316L stainless hlau phaj yog muag nyob rau hauv thicknesses ntawm 1.5 hli (daim ntawv/phaj ciam txawv los ntawm tus neeg muag khoom) mus txog 100 hli rau hnyav daim ntawv thov. Standard widths feem ntau yog 1,000 mm, 1,219 mm (48”), 1,500 mm, thiab 2,000 mm. Ntev li ntawm 2,000 mm mus rau 6,000 mm rau cov qauv Tshuag, nrog ntev ntev muaj raws li kev txiav - mus rau -size los yog coil txhua lub sij hawm{2. tsis yog - qauv thicknesses lossis hnyav daim hlau.
Xaus
Stainless hlau 316L phaj tsis yog tsuas yog corrosion-resistant alloy - nws yog ib qho kev tsim cov khoom siv zoo uas ua rau muaj kev lag luam tseem ceeb thoob plaws yim qhov loj: marine, tshuaj ua, tshuaj, zaub mov thiab dej haus, kev kho mob, roj thiab roj, architecture, thiab dej kho.
Nws txhais tau tias ua ke ntawm molybdenum- txhim kho cov tshuaj chloride (PREN 24–27), qis-carbon weldability, tag nrho cov austenitic toughness los ntawm cryogenic rau siab qhov kev pab kub, pov thawj biocompatibility, thiab kev thoob ntiaj teb cov qauv kev pab them nqi ua rau nws lub neej ntawd specification rau engineers tsis ua hauj lwm.
Thaum xaiv ntawm 316L thiab lwm qib, txoj kev txiav txim siab yog ncaj nraim: yog tias ib puag ncig muaj kev txhoj puab heev (chlorides, acids, biological media), yog tias cov khoom siv yog welded, yog tias yuav tsum tau ua raws li kev cai thiab kev tswj hwm, thiab yog tias yuav tsum muaj 30+ xyoo kev pab cuam lub neej yog lub hom phiaj - 316L stainless hlau phaj yog lub luag hauj lwm rau kev ua lag luam thiab kev ua lag luam.
Kev Qhia & Kev Nyeem Ntxiv
ASTM A240/A240M - Txheem Specification rau Chromium thiab Chromium-Nickel Stainless Hlau Phaj, Sheet, thiab Sawb rau Cov Vev Xaib Siab thiab rau Kev Siv Dav Hlau.
TS EN 10088-2: 2014 - Cov hlau tsis muaj steel: Cov txheej txheem xa khoom rau cov ntawv / phaj thiab sawb ntawm corrosion resisting steels rau lub hom phiaj dav dav.
ASME Boiler thiab Pressure Vessel Code, Tshooj II, Ntu A, SA-240.
ASTM A967/A967M - Txheem Specification rau Tshuaj Passivation Treatments rau Stainless Steel Parts.
NACE MR0175/ISO 15156 - Petroleum and natural gas industries: Cov khoom siv rau hauv H₂S-muaj ib puag ncig hauv kev tsim roj thiab roj.
ASM International. (2003). Cov Hlau Stainless. ASM Phau Ntawv Tshwj Xeeb Series.
Lula, RA (Ed.). (1986). Stainless hlau. American Society for Metals.
European Stainless Steel Development Association (Euro Inox). 'Stainless hlau nyob rau hauv Marine Environments'. Tsim phau ntawv Series.
Disclaimer: Qhov kev tshaj tawm blog no yog muab rau cov ntaub ntawv xov xwm thiab kev kawm. Kev xaiv cov khoom tshwj xeeb rau kev nyab xeeb- daim ntawv thov tseem ceeb yuav tsum tau lees paub los ntawm cov khoom tsim nyog lossis tus kws kho tshuab nrog kev paub txog cov kev pabcuam. Nco ntsoov xa mus rau cov qauv tsim nyog tam sim no.

