Kev sib piv zoo ntawm Inconel 625 alloy thiab Hastelloy C-276 alloy
Gnee Steel
Kev sib piv zoo ntawm Inconel 625 alloy thiab Hastelloy C-276 alloy
Inconel 625 boasts superior siab - kub lub zog, oxidation tsis kam, thiab txhim khu kev tiv thaiv rau cov organic acids, ua rau nws zoo tagnrho rau aerospace thiab marine daim ntaub ntawv. Hastelloy C-276, nrog nws cov ntsiab lus molybdenum siab dua, ua tau zoo tshwj xeeb hauv kev txo qis / acidic ib puag ncig (xws li hydrochloric acid), ua rau nws zoo tagnrho rau kev ua tshuaj lom neeg; Txawm li cas los xij, C-276 feem ntau kim dua. Ob leeg yog npib tsib xee-raws li cov alloys muaj zog, tab sis 625 cov ntsiab lus chromium txhim kho nws cov oxidation tsis kam, thaum C-276 cov ntsiab lus molybdenum ua rau nws tiv taus qhov chaw ib puag ncig.
Gnee Steel
Thaum twg siv Hastelloy C276 tubing?
Cov tubing no feem ntau siv rau hauv daim ntawv thov uas muaj cov kua qaub muaj zog xws li sulfuric acid, hydrochloric acid, thiab phosphoric acid. Hastelloy C276 tubing tuaj yeem tiv taus cov corrosiveness ntawm cov kua qaub uas muaj zog, ua rau nws tsim nyog rau cov khoom siv hauv cov khoom siv xws li cov tshuaj reactors, cov kab distillation, cov khoom siv hluav taws xob, thiab cov tshuaj txhuam hniav.
Inconel Alloy 625 yog dab tsi?
inconel npib tsib xee-chromium alloy 625 (UNS N06625 / W.Nr. 2.4856) yog siv dav vim nws lub zog siab, kev ua haujlwm zoo heev (suav nrog cov khoom sib koom), thiab zoo heev corrosion kuj. Nws qhov kev ua haujlwm kub yog los ntawm qhov kub qis mus rau 1800℃F (982 degree).
Hastelloy Alloy C-276 yog dab tsi?
Hastelloy C-276 alloy (UNS N10276) yog thawj forged npib tsib xee-chromium-molybdenum alloy khoom. Nws cov pa roj carbon tsawg thiab silicon tsis tshua muaj txiaj ntsig tau txo ntau qhov kev txhawj xeeb thaum lub sijhawm vuam. Raws li qhov tshwm sim, nws tau siv dav hauv kev lag luam tshuaj thiab lwm yam lag luam thiab muaj cov ntaub ntawv pov thawj ntawm kev ua tau zoo txog li 50 xyoo hauv ntau qhov chaw tshuaj lom neeg.
Inconel Alloy 625 vs Hastelloy Alloy C-276 Chemical Composition
| Element | Inconel 625 Cov ntsiab lus (%) | Hastelloy C-276 Cov ntsiab lus (%) |
|---|---|---|
| Nickel (Ni) | 5 8,0mn | Tshuav |
| Chromium (Cr) | 20.0 - 23.0 | 14.5 - 16.5 |
| Hlau (Fe) | 5.0 max | 4.0 - 7.0 |
| Molybdenum (hli) | 8.0 - 10.0 | 15.0 - 17.0 |
| Niobium (Nb) + Tantalum | 3.15 - 4.15 | - |
| Cov pa roj carbon (C) | 0.10 max | 0.01 max |
| Manganese (Mn) | 0.50 max | 1.0 max |
| Silicon (Si) | 0.50 max | 0.08 max |
| Phosphorus (P) | 0.015 max | 0.04 max |
| Sulfur (S) | 0.015 max | 0.03 max |
| Aluminium (Al) | 0.40 max | - |
| Titanium (Ti) | 0.40 max | - |
| Cobalt (zeeg) | 1.0 max | 2.5 max |
| Tungsten (W) | - | 3.0 - 4.5 |
| Vanadium (V) | - | 0.35 max |
Alloy 625 vs hastelloy c-276 Mechanical Properties
Alloy 625 Mechanical Properties
| Qhov ntom | Melting Point | Tensile zog | Yield zog (0.2% Offset) | Elongation |
| 8,4g 3 | 1350℃(2460℃F) | Psi - 135,000, MPa - 930 | Psi - 75,000, MPa - 517 | 42.5 % |
Alloy C276 Mechanical Properties
| Element | Yield zog (0.2% Offset) | Melting Point | Qhov ntom | Tensile zog | Elongation |
| C276 | Psi - 52,000, MPa - 355 | 1370℃(2500℃F) | 8.89g 3 | Psi - 1,15,000, MPa - 790 | 40 % |
Kev sib piv Corrosion Resistance ntawm Inconel 625 thiab Hastelloy C-276 Alloys
Inconel 625 thiab Hastelloy C-276 muaj cov nickel thiab hlau zoo sib xws; Qhov sib txawv tseem ceeb nyob hauv lawv cov ntsiab lus chromium thiab molybdenum.
Inconel 625 muaj cov ntsiab lus chromium ntau dua, uas txhim kho nws cov oxidation tsis kam. Qhov no ua rau nws ua tau zoo nyob rau hauv oxidizing ib puag ncig xws li concentrated sulfuric acid thiab nitric acid.
Ntawm qhov tod tes, Hastelloy C-276 muaj ntau molybdenum, uas ua rau nws zoo heev corrosion kuj nyob rau hauv kev txo qhov chaw xws li hydrochloric acid thiab hydrogen sulfide. Qhov no ua rau Hastelloy C-276 ua tau zoo dua nyob rau hauv cov xwm txheej no.
High -Tsub Ua Haujlwm
Ua haujlwm kub
Cov kws tshaj lij feem ntau ntsuas qhov siab -kub kev ua haujlwm ntawm cov alloys thaum xaiv rau qhov chaw hnyav. Ob leeg Inconel 625 thiab Hastelloy C-276 muaj kev ua tau zoo heev, tab sis lawv cov kev khiav hauj lwm kub sib txawv. Inconel 625 ua tau zoo hauv kev tswj cov khoom siv kho tshuab thiab kev ua haujlwm zoo ntawm qhov kub thiab txias. Cov hlau no tuaj yeem ua haujlwm tsis tu ncua ntawm qhov kub txog 982℃(1800℃F). Cov kev tshawb fawb tshawb fawb tau lees paub tias Inconel 625 khaws nws cov kev tiv thaiv rau deformation thiab ductility txawm tias kub txog 1150 degree. Cov txiaj ntsig no qhia txog cov alloy qhov haum rau cov ntawv thov uas xav tau kev txhim khu kev ntseeg siab-kub.
Thaum Hastelloy C-276 paub txog nws qhov kev tiv thaiv corrosion, nws qhov siab tshaj plaws ua haujlwm kub qis dua. Cov hlau no ua tau zoo tshaj plaws hauv qab 427℃(800℃F). Tshaj qhov ntsuas kub no, nws cov khoom siv kho tshuab tuaj yeem degrade, txwv nws daim ntawv thov nyob rau hauv huab cua kub ib puag ncig. Cov lus hauv qab no qhia txog qhov kev ua haujlwm siab tshaj plaws ntawm ob lub alloys:
| Alloy | Qhov kub thiab txias (degree) | Qhov kub thiab txias (degree F) |
|---|---|---|
| Ib 625 | 982 | 1800 |
| Hastelloy C-276 | 427 | 800 |
Oxidation Resistance
Oxidation kuj ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm siab - kub. Inconel 625 tsim cov txheej txheem oxide ruaj khov, tiv thaiv cov hlau los ntawm kev xeb ntxiv. Cov cuab yeej no tso cai rau cov hlau kom tiv taus ib puag ncig hnyav, suav nrog kev hloov pauv kub thiab cov roj corrosive ib puag ncig. Cov ntsiab lus siab nickel thiab chromium hauv Inconel 625 txhim kho nws cov oxidation tsis kam, ua rau nws nyiam cov khoom siv hauv aerospace thiab lub zog tsim hluav taws xob.
Hastelloy C-276 kuj pom zoo oxidation tsis kam, tab sis nws qhov siab - qhov kub thiab txias kev ua haujlwm tsis zoo li Inconel 625. Cov hlau no muaj cov ntsiab lus chromium qis, yog li tso siab rau molybdenum thiab tungsten ntau dua rau kev tiv thaiv. Thaum Hastelloy C-276 pom zoo oxidation tsis kam nyob rau hauv ntau yam tshuaj ua ib puag ncig, nws lub sij hawm ntev durability ntawm huab cua kub yuav tsis zoo li Inconel 625.
Weldability thiab Fabrication
Weldability
Weldability plays lub luag haujlwm tseem ceeb hauv cov engineers xaiv cov khoom siv rau qhov chaw hnyav. Inconel 625 alloy qhia tau zoo heev weldability, tshwj xeeb tshaj yog thaum siv cov txuj ci siab xws li txias hlau hloov (CMT). Cov txheej txheem no, nrog rau nws cov cua kub qis, pab tswj cov hlau dilution hauv weld overlay. Cov kev tshawb fawb tau pom tias khaws cov ntsiab lus hlau hauv qab 0.5% txhim kho corrosion kuj. Lub microstructure ntawm Inconel 625 welds feem ntau muaj cov tub ntxhais dendritic nrog kev sib cais ntawm niobium thiab molybdenum. Cov yam ntxwv no cuam tshuam rau nws cov kev tiv thaiv rau intergranular corrosion, tshwj xeeb tshaj yog nyob ze ntawm fusion ciam teb. Kev sim txoj kev xws li dual-ring electrochemical potentiodynamic reactivation (DL-EPR) thiab ASTM G28-02 pab ntsuam xyuas qhov zoo ntawm vuam thiab corrosion kuj.
Hastelloy C-276 alloy kuj pom zoo weldability, tab sis feem ntau yuav tsum tau nruj tswj ntawm cov cua sov input thiab tom qab-weld kev kho mob. Cov ntsiab lus molybdenum nyob rau hauv no alloy tsim ib tug concentration gradient thaum vuam, uas yuav cuam tshuam nws corrosion kuj. Txawm hais tias kev sib piv ncaj qha ntawm cov txiaj ntsig kev ntsuas vuam tsuas yog txwv, ob qho tib si alloys ua tau raws li cov qauv kev lag luam nruj rau cov khoom siv weldable.
| Yam | Inconel 625 (IN625) Weld Overlay | Hastelloy C-276 Welds (Kev sib piv) |
|---|---|---|
| Fabrication txheej txheem | Txias Hlau Hloov (CMT) thev naus laus zis nrog cov khoom siv hluav taws xob tsawg, | Cov txheej txheem vuam tsoos (piv txwv li, GTAW) hais ncaj qha |
| ua rau qis Fe dilution (<0.5 wt%) in weld overlay | ||
| Fe Cov ntsiab lus tswj | Fe cov ntsiab lus tswj qis dua 0.5% txhawm rau txhim kho corrosion | Tsis muaj cov ntaub ntawv qhia meej Fe tau muab |
| tsis kam; Uniform Fe faib tau lees paub los ntawm SEM-EDS | ||
| Microstructure | Dendritic core thiab interdendritic cheeb tsam nrog Nb thiab Mo | Mo concentration gradient cuam tshuam rau corrosion kuj |
| kev cais tawm; microstructure evolution cuam tshuam rau IGC tsis kam | ||
| Corrosion Test Methods | DL-Kev xeem EPR thiab ASTM G28-02 txoj kev siv los ntsuas IGC | Hais nyob rau hauv cov ntsiab lus ntawm Mo gradients cuam tshuam corrosion |
| Corrosion Resistance Nrhiav | IGC kuj nce nrog kev ncua deb ntawm substrate; siab | Corrosion kuj sib txawv txhais ntawm Mo gradient |
| susceptibility nyob ze fusion ciam teb vim microstructure | ||
| Kev sib piv Welding Outcomes | CMT txheej txheem txhim kho corrosion kuj piv rau GTAW | Tsis muaj qhov kev ntsuam xyuas ncaj qha los ntawm kev sib piv ob qho tib si alloys muab |
| tab sis phem tshaj IGC kuj tseem nyob ze substrate interface |
Fabrication
| Daim ntawv khoom / vuam khoom | Inconel 625 ASTM Txuj | Hastelloy C-276 ASTM Cov Qauv |
|---|---|---|
| Seamless Yeeb Nkab thiab Tubing | B444, B829 | B622, B983 |
| Welded yeeb nkab | B705, B775, B704, B751 | B619, B626 |
| Vuam Accessories | B366 | B366, B462 |
| Rods thiab Strips | B446 | B574 |
| Forgings | B564 | B564, B462 |
| Phaj, Sheet, thiab daim kab xev | B443 | B575 |
Kev siv ntawm Inconel 625 thiab Hastelloy C276
| Kev thov Sector | Inconel 625 Cov ntsiab lus tseem ceeb | Hastelloy C-276 Highlights |
|---|---|---|
| Aerospace | Siab -temp lub zog, oxidation kuj | Siv nyob rau hauv corrosive media, txwv los ntawm temp. zog |
| Tubrog nkoj | Seawater corrosion, qaug zog kuj | Superior localized corrosion kuj |
| Kev ua tshuaj lom neeg | Oxidizing/non{0}}Oxidizing tshuaj, halides | Txo cov kua qaub, halide hom, reactors |
| Roj & Roj | Offshore platforms, kev nyuaj siab corrosion kuj | Cov kua qaub qaub, cov kua qaub |
| Pulp & Ntawv | Bleach nroj tsuag, chlorine -raws li oxidizers | Tsis tshua muaj, siv nyob rau hauv hnyav tshuaj zones |
Gnee Steel yog cov chaw tsim khoom ntawm ntau yam nickel{0}}raws li alloys, suav nrog Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 71807, Inconel 7107, Inconel Incoloy 800H / HT, Incoloy 825, Monel Alloy 400, Monel K500, thiab kub kub alloys. Peb tshwj xeeb hauv kev tsim khoom thiab muag khoom ntawm cov ntaub ntawv alloy. Gnee Steel cov khoom siv dav siv hauv aerospace, tshuaj, hluav taws xob, tsheb, thiab nuclear zog kev lag luam, thiab peb tuaj yeem muab cov khoom siv alloy customized raws li cov neeg siv khoom xav tau. Rau cov khoom siv alloy tus nqi nug lossis thov kom haum rau cov khoom siv alloy, thov koj xav tiv tauj peb ntawmru@gneesteelgroup.com rau ib nqe lus.