I-ALLOY 825 AMATERIAL DATA ishidi
Incazelo Yomkhiqizo
Ugqinsi olutholakalayo lwe-Alloy 825:
| 3/16" | 1/4" | 3/8" | 1/2" | 5/8" | 3/4" |
| 4.8mm | 6.3mm | 9.5 mm | 12.7mm | 15.9mm | 19 mm |
|
| |||||
| 1" | 1 1/4" | 1 1/2" | 1 3/4" | 2" |
|
| 25.4mm | 31.8mm | 38.1mm | 44.5mm | 50.8mm |
|
I-alloy 825 (UNS N08825) iyingxubevange ye-nickel-iron-chromium ye-austenitic enezengezo ze-molybdenum, ithusi ne-titanium.Yakhelwe ukunikeza ukumelana nokugqwala okukhethekile kuzo zombili izindawo ezikhipha i-oxidizing nezokunciphisa.Ingxubevange imelana ne-chloride stress-corrosion cracking and pitting.Ukwengezwa kwe-titanium kuzinza i-Alloy 825 ngokumelene nokuzwela esimweni esishiselwe okwenza ingxubevange imelane nokuhlaselwa kwe-intergranular ngemva kokuchayeka emazingeni okushisa ebangeni obungathulisa izinsimbi ezingenasici ezingaqinile.Ukwenziwa kwe-Alloy 825 kufana nengxubevange ye-nickel-base, into ekwakheka kalula futhi ishiseleke ngamasu ahlukahlukene.
Ishidi Lokucaciswa
kwe-Alloy 825 (UNS N08825)
W.Nr.2.4858:
I-Austenitic Nickel-Iron-Chromium Alloy Yakhelwe Ukumelana Nokugqwala Okukhethekile Kuzo Zombili I-Oxidizing kanye Nendawo Enciphisa
● Izakhiwo Ezivamile
● Izinhlelo zokusebenza
● Izindinganiso
● Ukuhlaziywa Kwamakhemikhali
● Izinto Ezingokoqobo
● Izakhiwo Zemishini
● Ukumelana Nokugqwala
● Ukumelana nokuqhekeka kwe-Stress-Corrosion
● Ukumelana Nezimbobo
● I-Crevice Corrosion Resistance
● I-Intergranular Corrosion Resistance
Izakhiwo Ezijwayelekile
I-alloy 825 (UNS N08825) iyingxubevange ye-nickel-iron-chromium ye-austenitic enezengezo ze-molybdenum, ithusi ne-titanium.Yakhelwe ukunikeza ukumelana okuyingqayizivele ezindaweni eziningi ezigqwalayo, kokubili i-oxidizing kanye nokunciphisa.
Okuqukethwe kwe-nickel ye-Alloy 825 kuyenza imelane nokuqhekeka kwe-chloride-stress-corrosion, futhi kuhlanganiswe ne-molybdenum nethusi, kunikeza ukumelana nokugqwala okuthuthuke kakhulu ekunciphiseni izindawo uma kuqhathaniswa nezinsimbi ezivamile ze-austenitic.Okuqukethwe kwe-chromium ne-molybdenum ye-Alloy 825 kunikeza ukumelana ne-chloride pitting, kanye nokumelana nezinhlobonhlobo ze-oxidizing atmospheres.Ukwengezwa kwe-titanium kuzinzisa ingxubevange ngokumelene nokuzwela esimweni esishiselwe.Lokhu kuzinzisa kwenza i-Alloy 825 imelane nokuhlaselwa kwe-intergranular ngemva kokuchayeka ebangeni lokushisa elivame ukwazisa izinsimbi ezingenasici ezingaqinile.
Ingxubevange 825 imelana nokugqwala ezindaweni ezihlukahlukene zezinqubo ezihlanganisa isibabule, isibabule, iphosphoric, i-nitric, i-hydrofluoric kanye nama-organic acid nama-alkali afana ne-sodium noma i-potassium hydroxide, nezixazululo ze-acidic chloride.
Ukwenziwa kwe-Alloy 825 kufana nengxubevange ye-nickel-base, enezinto ezikwakheka kalula futhi ezishiselekayo ngamasu ahlukahlukene.
Izinhlelo zokusebenza
● Ukulawula Ukungcoliswa Komoya
● Abahlikihli
● Izisetshenziswa Zokucubungula Amakhemikhali
● Ama-Acids
● Ama-alkali
● Izinsiza Zokusebenza Kokudla
● Nuclear
● Ukucutshungulwa kabusha kwamafutha
● Izincibilikisi ze-Fuel Element
● Ukuphatha Imfucuza
● Ukukhiqizwa Kwawoyela Negesi Ngasogwini
● Izishintshi Zokushisa Zamanzi Olwandle
● Amapayipi Amapayipi
● Izingxenye Zegesi Emuncu
● Ukucutshungulwa kwensimbi
● Izinto Zokucwenga Ithusi
● Ukucwengisiswa Kwe-Petroleum
● Izishintshi Zokushisa Ezipholile
● Izisetshenziswa zokukha insimbi
● Amakhoyili Okushisa
● Amathangi
● Amakhreyithi
● Obhasikidi
● Ukulahlwa Kwemfucuza
● Amapayipi Wokujova Amanzi
Amazinga
I-ASTM..................B 424
ASME..................SB 424
Ukuhlaziywa Kwamakhemikhali
Amanani Ajwayelekile (Isisindo %)
| I-Nickel | 38.0 imiz.–46.0 ubuningi. | Insimbi | 22.0 imiz. |
| I-Chromium | 19.5 imiz.–23.5 ubuningi. | I-Molybdenum | 2.5 amaminithi.–3.5 ubuningi. |
| I-Molybdenum | 8.0 min.-10.0 ubuningi. | Ithusi | 1.5 amaminithi.–3.0 ubuningi. |
| I-Titanium | 0.6 min.–1.2 ubuningi. | Ikhabhoni | 0.05 ubuningi. |
| I-Niobium (plus Tantalum) | 3.15 min.-4.15 ubuningi. | I-Titanium | 0.40 |
| Ikhabhoni | 0.10 | IManganese | 1.00 ubuningi. |
| Isibabule | 0.03 ubuningi. | I-silicon | 0.5 ubuningi. |
| I-Aluminium | 0.2 ubuningi. |
|
Izakhiwo Zomzimba
Ukuminyana
0.294 lbs/ku-3
8.14 g/cm3
Ukushisa Okuthize
0.105 BTU/lb-°F
440 J/kg-°K
I-Modulus ye-Elasticity
28.3 psi x 106 (100°F)
196 MPa (38°C)
I-Magnetic Permeability
1.005 Oersted (μ at 200H)
I-Thermal Conductivity
76.8 BTU/ihora/ft2/ft-°F (78°F)
11.3 W/m-°K (26°C)
Ibanga elincibilikayo
2500 - 2550°F
1370 - 1400°C
Ukungazweli Kagesi
678 Ohm circ mil/ft (78°F)
1.13 μ cm (26°C)
I-Linear Coefficient of Thermal Expansion
7.8 x 10-6 in / in°F (200°F)
4 m / m°C (93°F)
Izakhiwo Zemishini
Izakhiwo Zemishini Yezinga Lokushisa Ejwayelekile, I-Mill Annealed
| Isivuno Amandla 0.2% Offset | I-Ultimate Tensile Amandla | Ukwelula ku2 ku. | Ukuqina | ||
| psi (min.) | (MPa) | psi (min.) | (MPa) | % (imizuzu) | Rockwell B |
| 49,000 | 338 | 96,000 | 662 | 45 | 135-165 |
I-alloy 825 inezici ezinhle zemishini kusuka ku-cryogenic kuya emazingeni okushisa aphakathi nendawo.Ukuchayeka emazingeni okushisa angaphezu kuka-1000°F (540°C) kungaholela ezinguqukweni ku-microstructure ezokwehlisa kakhulu i-ductility kanye namandla okuthonya.Ngaleso sizathu, i-Alloy 825 akumele isetshenziswe emazingeni okushisa lapho izakhiwo eziqhekekayo ziyizici zokuklama.I-alloy ingaqiniswa kakhulu ngomsebenzi obandayo.I-alloy 825 inamandla okuthonya okuhle ekamelweni lokushisa, futhi igcina amandla ayo emazingeni okushisa e-cryogenic.
Ithebula 6 - I-Charpy Keyhole Impact Amandla ePlate
| Izinga lokushisa | Ukuqondisa | Amandla Omthelela* | ||
| °F | °C |
| ft-lb | J |
| Igumbi | Igumbi | I-Longitudinal | 79.0 | 107 |
| Igumbi | Igumbi | Phenduka | 83.0 | 113 |
| -110 | -43 | I-Longitudinal | 78.0 | 106 |
| -110 | -43 | Phenduka | 78.5 | 106 |
| -320 | -196 | I-Longitudinal | 67.0 | 91 |
| -320 | -196 | Phenduka | 71.5 | 97 |
| -423 | -253 | I-Longitudinal | 68.0 | 92 |
| -423 | -253 | Phenduka | 68.0 | 92 |
Ukumelana Nokugqwala
Isici esivelele kunazo zonke se-Alloy 825 ukumelana nokugqwala kwayo okuhle kakhulu.Kuzo zombili izindawo ezihlanganisa i-oxidizing nezokwehlisa, ingxubevange imelana nokugqwala okuvamile, umgodi, ukugqwala kwe-crevice, ukugqwala kwe-intergranular kanye nokuqhekeka kwe-chloride-stress-corrosion.
Ukumelana Nezixazululo Ze-Laboratory Sulfuric Acid
| Ingxubevange | Izinga Lokugqwala Elabhorethri Ebilayo Yesixazululo Se-Sulfuric Acid Mils/Ngonyaka (mm/a) | ||
| 10% | 40% | 50% | |
| 316 | 636 (16.2) | >1000 (>25) | >1000 (>25) |
| 825 | 20 (0.5) | 11 (0.28) | 20 (0.5) |
| 625 | 20 (0.5) | Akuhloliwe | 17 (0.4) |
Ukumelana nokuqhekeka kwe-Stress-Corrosion
Okuqukethwe kwe-nickel ephezulu kwe-Alloy 825 kunikeza ukumelana okumangalisayo nokuqhekeka kwe-chloride stress-corrosion.Kodwa-ke, ekuhlolweni okubilisa kakhulu kwe-magnesium chloride, ingxubevange izoqhekeka ngemva kokuchayeka isikhathi eside kumaphesenti amasampuli.I-alloy 825 yenza kangcono kakhulu ekuhlolweni kwaselabhorethri okungatheni kakhulu.Ithebula elilandelayo lifingqa ukusebenza kwengxubevange.
Ukumelana Ne-Chloride Stress Corrosion Cracking
| Ingxubevange Ihlolwe njengamasampula e-U-Bend | ||||
| Isixazululo Sokuhlola | Ingxubevange 316 | I-SSC-6MO | Ingxubevange 825 | Ingxubevange 625 |
| 42% Magnesium Chloride (Abilayo) | Yehlulekile | Kuxutshiwe | Kuxutshiwe | Melana |
| 33% I-Lithium Chloride (Ebilayo) | Yehlulekile | Melana | Melana | Melana |
| 26% Sodium Chloride (Ukubilisa) | Yehlulekile | Melana | Melana | Melana |
Okuxutshiwe - Ingxenye yamasampula ahloliwe yehlulekile emahoreni angu-2000 okuhlolwa.Lokhu kuyinkomba yezinga eliphezulu lokumelana.
I-Pitting Resistance
Okuqukethwe kwe-chromium ne-molybdenum ye-Alloy 825 kunikeza izinga eliphezulu lokumelana ne-chloride pitting.Ngenxa yalesi sizathu ingxubevange ingasetshenziswa ezindaweni ezine-chloride ephezulu njengamanzi olwandle.Ingasetshenziswa ikakhulukazi ezinhlelweni lapho ukugoba okuthile kungabekezelelwa.Iphakeme kunezinsimbi ezivamile ezingenasici ezifana ne-316L, noma kunjalo, ekusetshenzisweni kwamanzi olwandle I-Alloy 825 ayinikezi amazinga afanayo okumelana njenge-SSC-6MO (UNS N08367) noma i-Alloy 625 (UNS N06625).
I-Crevice Corrosion Resistance
Ukumelana neChloride Pitting kanye neCrevice Corrosion
| Ingxubevange | Izinga Lokushisa Lokuqalisa ku-Crevice I-Corrosion Attack* °F (°C) |
| 316 | 27 (-2.5) |
| 825 | 32 (0.0) |
| 6MO | 113 (45.0) |
| 625 | 113 (45.0) |
*Inqubo ye-ASTM G-48, 10% Ferric Chloride
I-Intergranular Corrosion Resistance
| Ingxubevange | Ukubilisa 65% Nitric Acid ASTM Inqubo A 262 Umkhuba C | Ukubilisa 65% Nitric Acid ASTM Inqubo A 262 Umkhuba B |
| 316 | 34 (.85) | 36 (.91) |
| 316L | 18 (.47) | 26 (.66) |
| 825 | 12 (.30) | 1 (.03) |
| I-SSC-6MO | 30 (.76) | 19 (.48) |
| 625 | 37 (.94) | Akuhloliwe |
