ALOY 825 MATERIAL DATA SHEETS
Tlhaloso ea Sehlahisoa
Botenya bo teng bakeng sa Alloy 825:
| 3/16" | 1/4" | 3/8" | 1/2" | 5/8" | 3/4" |
| 4.8mm | 6.3 limilimithara | 9.5 limilimithara | 12.7 limilimithara | 15.9 limilimithara | 19 limilimithara |
|
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| 1" | 1 1/4" | 1 1/2" | 1 3/4" | 2" |
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| 25.4 limilimithara | 31.8 limilimithara | 38.1 limilimithara | 44.5 limilimithara | 50.8 limilimithara |
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Alloy 825 (UNS N08825) ke alloy ea nickel-iron-chromium ea austenitic e nang le litlatsetso tsa molybdenum, koporo le titanium. E ile ea ntlafatsoa ho fana ka khanyetso e ikhethang ea kutu maemong a mabeli a oxidizing le a fokotsang. Alloy e hanyetsana le chloride stress-corrosion cracking le pitting. Ho eketsoa ha titanium ho tsitsisa Alloy 825 khahlano le ts'usumetso e maemong a ts'oenyehileng e etsang hore motsoako o hane ho hlaseloa ke li-intergranular ka mor'a ho pepesehela mocheso ka mefuta e fapaneng e ka susumetsang litšepe tse sa tsitsang tse sa tsitsang. Ho etsoa ha Alloy 825 ho tloaelehile ka li-alloys tsa nickel-base, tse nang le thepa e ka etsoang habonolo le ho cheseha ka mekhoa e fapaneng.
Leqephe la Litlhaloso
bakeng sa Alloy 825 (UNS N08825)
W.Nr. 2.4858:
Austenitic Nickel-Iron-Chromium Alloy e Hlahisoe bakeng sa Khanyetso e ikhethang ea Corrosion ka Bobeli Tikolohong ea Oxidizing le Phokotso.
● Thepa e Akaretsang
● Lisebelisoa
● Melao-motheo
● Tlhahlobo ea Lik'hemik'hale
● Lintho Tsa Sebele
● Thepa ea Mechini
● Ho Hanela ho Ruta
● Khatello-Corrosion Cracking Resistance
● Ho Khanyetso ka Sekoti
● Crevice Corrosion Resistance
● Intergranular Corrosion Resistance
Kakaretso Thepa
Alloy 825 (UNS N08825) ke alloy ea nickel-iron-chromium ea austenitic e nang le litlatsetso tsa molybdenum, koporo le titanium. E ile ea ntlafatsoa ho fana ka khanyetso e ikhethang tikolohong e mengata e senyang, ka bobeli oxidizing le ho fokotsa.
Likahare tsa nickel tsa Alloy 825 li etsa hore e se ke ea hlola e phatloha ha chloride stress-corrosion cracking, 'me e kopantsoe le molybdenum le koporo, e fana ka matla a ntlafetseng a ho hanyetsa ho senyeha ha maemo ha a bapisoa le litšepe tse tloaelehileng tsa austenitic. Likahare tsa chromium le molybdenum tsa Alloy 825 li fana ka khanyetso ho chloride pitting, hammoho le ho hanyetsa mefuta e fapaneng ea oxidizing atmospheres. Ho eketsoa ha titanium ho tsitsisa alloy khahlano le ts'usumetso maemong a joalo ka weld. Ho tsitsisa hona ho etsa hore Alloy 825 e se ke ea hlola e hlaseloa ke li-intergranular ka mor'a hore e be boemong ba mocheso oo ka tloaelo o neng o ka susumetsa litšepe tse sa tsitsang tse sa tsitsang.
Alloy 825 e hanana le kutu maemong a fapaneng a ts'ebetso ho kenyelletsa sulfuric, sulfurous, phosphoric, nitric, hydrofluoric le organic acids le alkalis joalo ka sodium kapa potassium hydroxide, le acidic chloride solution.
Ho etsoa ha Alloy 825 ho tloaelehile ka li-alloys tse nang le nickel-base, tse nang le thepa e bonolo le e ka chesehang ka mekhoa e fapaneng.
Lisebelisoa
● Taolo ea Tšilafalo ea Moea
● Li-scrubbers
● Lisebelisoa tsa ho Etsa Lik'hemik'hale
● Acids
● Alkalis
● Thepa ea Lijo
● Nyutlelie
● Ho Hlophisa Mafura
● Lisebelisoa tsa Mafura
● Ho Sebelisa Matlakala
● Ho Hlahisa Oli le Khase ka Leoatleng
● Lisebelisoa tsa Mocheso oa Metsi a Leoatleng
● Lisebelisoa tsa Liphaephe
● Lisebelisoa tsa Khase e Bolila
● Ho sebetsa ka Ore
● Thepa e Hloekisang Koporo
● Ho Hloekisa Petroleum
● Li-Heat Exchangers tse pholileng ka moea
● Thepa ea Tšepe ea Pickling
● Likhoele tse futhumatsang
● Litanka
● Makete
● Libaskete
● Ho Lahla Litšila
● Ente Well Piping Systems
Litekanyetso
ASTM..................B 424
ASME..................SB 424
Tlhahlobo ea Lik'hemik'hale
Maemo a Tlwaelehileng (Boima %)
| Nickel | 38.0 mets.–46.0 max. | Tšepe | 22.0 mets. |
| Chromium | 19.5 mets.–23.5 max. | Molybdenum | 2.5 mets.–3.5 max. |
| Molybdenum | 8.0 mets.-10.0 max. | Koporo | 1.5 mets.–3.0 max. |
| Titanium | 0.6 mets.–1.2 max. | Khabone | 0.05 max. |
| Niobium (mmoho le Tantalum) | 3.15 mets.-4.15 max. | Titanium | 0.40 |
| Khabone | 0.10 | Manganese | 1.00 max. |
| Sebabole | 0.03 boholo. | Silicone | 0.5 boholo. |
| Aluminium | 0.2 boholo. |
|
Lintho Tsa 'Mele
Botenya
0.294 lbs/in3
8.14 g/cm3
Mocheso o khethehileng
0.105 BTU/lb-°F
440 J/kg-°K
Modulus ea Elasticity
28.3 psi x 106 (100°F)
196 MPa (38°C)
Magnetic Permeability
1.005 Oersted (μ ka 200H)
Thermal Conductivity
76.8 BTU/hr/ft2/ft-°F (78°F)
11.3 W/m-°K (26°C)
Melting Range
2500 - 2550°F
1370 - 1400°C
Ho hanyetsa Motlakase
678 Ohm circ mil/ft (78°F)
1.13 μ cm (26°C)
Linear Coefficient ea Katoloso ea Thermal
7.8 x 10-6 ho / in°F (200°F)
4 m / m°C (93°F)
Thepa ea Mechini
Thepa e Tloaelehileng ea Mocheso oa Kamore ea Mechanical, Mill Annealed
| Kotulo Matla 0.2% Offset | Ultimate Tensile Matla | Elongation ka 2in. | Ho thatafala | ||
| psi (mets.) | (MPa) | psi (mets.) | (MPa) | % (mets.) | Rockwell B |
| 49,000 | 338 | 96,000 | 662 | 45 | 135-165 |
Alloy 825 e na le thepa e ntle ea mochini ho tloha ho cryogenic ho ea ho mocheso o phahameng o itekanetseng. Ho pepesetsoa mocheso o ka holimo ho 1000 ° F (540 ° C) ho ka fella ka liphetoho ho microstructure e tla fokotsa ductility haholo le matla a amang. Ka lebaka leo, Alloy 825 ha ea lokela ho sebelisoa maemong a mocheso moo thepa ea ho phatloha e leng lintlha tsa moralo. Alloy e ka matlafatsoa haholo ke mosebetsi o batang. Alloy 825 e na le tšusumetso e ntle mochesong oa kamore, 'me e boloka matla a eona mochesong oa cryogenic.
Letlapa la 6 - Charpy Keyhole Impact Matla a Plate
| Mocheso | Boitloaelo | Matla a Tšusumetso* | ||
| °F | °C |
| ft-lb | J |
| Kamore | Kamore | Longitudinal | 79.0 | 107 |
| Kamore | Kamore | Phatlalatso | 83.0 | 113 |
| -110 | -43 | Longitudinal | 78.0 | 106 |
| -110 | -43 | Phatlalatso | 78.5 | 106 |
| -320 | -196 | Longitudinal | 67.0 | 91 |
| -320 | -196 | Phatlalatso | 71.5 | 97 |
| -423 | -253 | Longitudinal | 68.0 | 92 |
| -423 | -253 | Phatlalatso | 68.0 | 92 |
Khanyetso ea Corrosion
Tšobotsi e ikhethang ka ho fetisisa ea Alloy 825 ke khanyetso ea eona e ntle ea kutu. Libakeng tse peli tse nang le oxidizing le tse fokotsang, motsoako o hanela kutu ka kakaretso, pitting, crevice corrosion, intergranular corrosion le chloride stress-corrosion cracking.
Ho hanyetsa Litharollo tsa Laboratori ea Sulfuric Acid
| Alloy | Sekhahla sa Corrosion Laporing e Belisang ea Sulfuric Acid Solution Mil/Selemo (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) | Ha e Lekoe | 17 (0.4) |
Khatello-Corrosion Cracking Resistance
Likahare tse phahameng tsa nickel tsa Alloy 825 li fana ka khanyetso e kholo ea chloride stress-corrosion cracking. Leha ho le joalo, tekong e matla haholo e belang ea magnesium chloride, motsoako o tla peperana ka mor'a ho pepeseha nako e telele peresente ea lisampole. Alloy 825 e sebetsa hantle haholo litekong tsa laboratori tse seng matla haholo. Tafole e latelang e akaretsa ts'ebetso ea alloy.
Ho hanyetsa Chloride Stress Corrosion Cracking
| Alloy e Lekoa joalo ka lisampole tsa U-Bend | ||||
| Tharollo ea Tlhahlobo | Motsoako oa 316 | SSC-6MO | Motsoako oa 825 | Motsoako oa 625 |
| 42% Magnesium Chloride (e phehile) | hloleha | Kopantsoeng | Kopantsoeng | Hanyetsa |
| 33% Lithium Chloride (e phehile) | hloleha | Hanyetsa | Hanyetsa | Hanyetsa |
| 26% Sodium Chloride (Ho pheha) | hloleha | Hanyetsa | Hanyetsa | Hanyetsa |
E tsoakiloeng - Karolo ea lisampole tse lekiloeng li ile tsa hlōleha lihora tse 2000 tsa teko. Sena ke sesupo sa boemo bo phahameng ba khanyetso.
Pitting Resistance
Likahare tsa chromium le molybdenum tsa Alloy 825 li fana ka boemo bo phahameng ba ho hanyetsa chloride pitting. Ka lebaka lena alloy e ka sebelisoa libakeng tse nang le chloride e phahameng joalo ka metsi a leoatle. E ka sebelisoa haholo-holo lits'ebetsong tseo ho tsona ho ka mamelloang likoti tse ling. E phahametse litšepe tse tloaelehileng tse sa hloekang tse kang 316L, leha ho le joalo, lits'ebetsong tsa metsi a leoatle Alloy 825 ha e fane ka litekanyetso tse tšoanang tsa ho hanyetsa joaloka SSC-6MO (UNS N08367) kapa Alloy 625 (UNS N06625).
Crevice Corrosion Resistance
Ho hanyetsana le Chloride Pitting le Crevice Corrosion
| Alloy | Mocheso oa ho Qala ho Crevice Corrosion Attack* °F (°C) |
| 316 | 27 (-2.5) |
| 825 | 32 (0.0) |
| 6MO | 113 (45.0) |
| 625 | 113 (45.0) |
*Ts'ebetso ea ASTM G-48, 10% Ferric Chloride
Intergranular Corrosion Resistance
| Alloy | Ho belisa 65% Nitric Acid ASTM Mokhoa oa A262 Mokhoa oa C | Ho belisa 65% Nitric Acid ASTM Mokhoa oa A 262 Mokhoa oa B |
| 316 | 34 (.85) | 36 (.91) |
| 316L | 18 (.47) | 26 (.66) |
| 825 | 12 (.30) | 1 (.03) |
| SSC-6MO | 30 (.76) | 19 (.48) |
| 625 | 37 (.94) | Ha e Lekoe |
