ALLOY 825 XOGTA ALAABKA
Sharaxaada Alaabta
Dhumucyada la heli karo ee Alloy 825:
| 3/16" | 1/4" | 3/8" | 1/2" | 5/8" | 3/4" |
| 4.8mm | 6.3mm | 9.5mm | 12.7mm | 15.9mm | 19mm |
|
| |||||
| 1" | 1 1/4" | 1 1/2" | 1 3/4" | 2" |
|
| 25.4mm | 31.8mm | 38.1mm | 44.5mm | 50.8mm |
|
Alloy 825 (UNS N08825) waa austenitic nikkel-iron-chromium alloy oo lagu daray molybdenum, copper iyo titanium. Waxaa loo sameeyay si ay u bixiso iska caabin daxaleed oo gaar ah labadaba oxidizing iyo dhimista deegaanka. Alwaaxdu waxay u adkaysanaysaa werwerka chloride-daxalka dillaaca iyo godadka. Ku darida titanium-ka waxay xasilinaysaa Alloy 825 ka dhanka ah dareenka xaaladaha sida-welded taasoo ka dhigaysa daawaha u adkeysaneysa weerarka intergranular ka dib soo-gaadhista heerkul kala duwan oo dareensiin kara birta aan xasilin ee birta ah. Soo saarista Alloy 825 waa mid ka mid ah alloysyada nikkel-saldhigga, iyada oo alaabtu ay tahay mid diyaarsan oo la farsamayn karo oo lagu alxan karo farsamooyin kala duwan.
Xaashida qeexitaanka
ee Alloy 825 (UNS N08825)
W.Nr. 2.4858:
Astenitic Nickel-Iron-Chromium Alloy Loo Sameeyay Iska caabinta Daxalka Gaarka ah ee Oxidizing iyo Yaraynta Deegaanka labadaba
● Guryaha Guud
Codsiyada
● Heerarka
● Falanqaynta Kiimikada
● Qalabka Jirka
● Guryaha makaanikada
● Iska caabinta daxalka
● Cadaadiska-Daxalka Dilaaca iska caabinta
● Iska caabin xun
● Iska caabinta Daxalka Keebka
● Iska caabinta daxalka dhexdooda
Guryaha Guud
Alloy 825 (UNS N08825) waa austenitic nikkel-iron-chromium alloy oo lagu daray molybdenum, copper iyo titanium. Waxaa loo sameeyay si ay u bixiso iska caabin aan caadi ahayn oo ku wajahan bey'ado badan oo daxalka, labadaba oksaydheynta iyo dhimista.
Maadada nikkel ee Alloy 825 waxay ka dhigtaa mid adkaysi u leh dillaaca daxalka chloride, oo ay weheliso molybdenum iyo naxaas, waxay siisaa iska caabbinta daxalka oo si weyn loo hagaajiyay si loo yareeyo bay'ada marka la barbar dhigo birta austenitic-ka caadiga ah. Maaddada chromium iyo molybdenum-ka ee Alloy 825 waxay bixisaa iska caabbinta godad chloride, iyo sidoo kale iska caabin noocyo kala duwan oo jawi oksidizing ah. Ku-darka titanium-ka wuxuu dejiyaa daawaynta ka soo horjeeda dareenka xaalad-welded. Dejintani waxay ka dhigaysaa Alloy 825 adkaysi u leh weerarka intergranular ka dib soo-gaadhista heerkulka heerkulka kaas oo caadiyan dareensiin doona birta aan xasilin ee aan xasilin.
Alloy 825 waxay u adkaysataa daxalka in noocyo badan oo geedi socodka deegaanka ah oo ay ku jiraan sulfuric, sulfurous, fosfooraska, nitric, hydrofluoric iyo acids organic iyo alkalis sida sodium ama potassium hydroxide, iyo xal chloride acidic.
Samaynta Alloy 825 waa mid ka mid ah alloys-ka-saldhigga nikkel, oo leh walxo diyaarsan oo la farsameyn karo oo lagu alxan karo farsamooyin kala duwan.
Codsiyada
● Xakamaynta wasakhowga hawada
● Xoqadaha
● Qalabka Ka-hortagga Kiimikada
● Asiidhyada
● Alkalis
● Qalabka Habka Cuntada
● Nukliyeerka
● Dib u habaynta shidaalka
● Qaybaha Shidaalka
● Wax ka qabashada qashinka
● Soosaarka Shidaalka iyo Gaaska ee Badda
● Bedeleyaasha kulaylka biyaha badda
● Nidaamyada tuubooyinka
● Qaybaha Gaaska dhanaan
● Habaynta macdanta
● Qalabka Sifaynta Naxaasta
● Sifaynta batroolka
● Qaboojiyayaasha kulaylka
● Qalabka lagu guro birta
● Gariiradaha kululaynta
● Haamaha
● Sanduuqyada
● Danbiyada
● Qashin tuurista
● Nidaamyada Tuubooyinka Ceelka la isku duro
Heerarka
ASTM.....................B 424
ASME......................SB 424
Falanqaynta Kiimikada
Qiimaha caadiga ah (Miisaanka%)
| Nikkel | 38.0 min.-46.0 max. | Birta | 22.0 daqiiqo. |
| Chromium | 19.5 min.-23.5 max. | Molybdenum | 2.5 min.-3.5 max. |
| Molybdenum | 8.0 min.-10.0 max. | Copper | 1.5 min.-3.0 max. |
| Titanium | 0.6 min.–1.2 max. | Kaarboon | 0.05 max. |
| Niobium (oo lagu daray Tantalum) | 3.15 min.-4.15 max. | Titanium | 0.40 |
| Kaarboon | 0.10 | Manganese | 1.00 max |
| Baaruud | 0.03 max. | Silikoon | 0.5 max |
| Aluminium | 0.2 max |
|
Guryaha Jirka
Cufnaanta
0.294 rodol/in3
8.14 g/cm3
Kuleylka Gaarka ah
0.105 BTU/lb-°F
440 J/kg-°K
Qaabka Elasticity
28.3 psi x 106 (100°F)
196 MPa (38°C)
Dhererka Birlabka
1.005 Oersted (μ at 200H)
Habdhaqanka kulaylka
76.8 BTU/saacaddii/ft2/ft-°F (78°F)
11.3 W/m-°K (26°C)
Range dhalaalay
2500 - 2550°F
1370 - 1400 ° C
Iska caabin koronto
678 Ohm wareega mil/ft (78°F)
1.13 μsm (26°C)
Iskuxidhka Tooska ah ee Balaadhinta Kulaylka
7.8 x 10-6 in°F (200°F)
4 m / m°C (93°F)
Guryaha Makaanikada
Guryaha Makaanikada Heerkulka Qolka Caadiga ah, Mishiinka la Annealed
| Xoogga Wax-soo-saarka 0.2% Dejinta | Tensile ugu dambeeya Xoog | Dheeraynta in 2 in. | Adag | ||
| psi (daq.) | (MPa) | psi (daq.) | (MPa) | % (min.) | Rockwell B |
| 49,000 | 338 | 96,000 | 662 | 45 | 135-165 |
Alloy 825 wuxuu leeyahay sifooyin farsamo oo wanaagsan laga bilaabo cryogenic ilaa heerkul dhexdhexaad ah. Soo-gaadhista heerkul ka sarreeya 1000°F (540°C) waxay keeni kartaa isbeddelo ku yimaada qaab-dhismeed yar oo si weyn hoos ugu dhigi doona ductility iyo saamaynta xoogga. Sababtaas awgeed, Alloy 825 waa in aan lagu isticmaalin heerkulka halkaas oo guryaha gurguurta ay yihiin arrimo nakhshad. Daawaha waxaa si weyn loogu xoojin karaa shaqo qabow. Alloy 825 waxa uu leeyahay saamayn wanaagsan marka la eego heerkulka qolka, oo ku xajiya xooggiisa heerkulka cryogenic.
Shaxda 6 - Saamaynta Daloolka Furaha ee Daciifsan Awoodda Saxanka
| Heerkulka | Hanuuninta | Xoogga Saamaynta* | ||
| °F | °C |
| ft-lb | J |
| Qolka | Qolka | Dhererran | 79.0 | 107 |
| Qolka | Qolka | Guddoon | 83.0 | 113 |
| -110 | -43 | Dhererran | 78.0 | 106 |
| -110 | -43 | Guddoon | 78.5 | 106 |
| -320 | -196 | Dhererran | 67.0 | 91 |
| -320 | -196 | Guddoon | 71.5 | 97 |
| -423 | -253 | Dhererran | 68.0 | 92 |
| -423 | -253 | Guddoon | 68.0 | 92 |
Iska caabinta daxalka
Dabeecadda ugu caansan ee Alloy 825 waa iska caabbinta daxalka wanaagsan. Labada deegaan ee oksaydhaynta iyo yaraynta, daawaha waxa ay iska caabiyaan daxalka guud, daxalka, daxalka intergranular iyo chloride dildilaaca-daxalka.
Iska caabinta shaybaadhka Sulfuric acid Solutions
| Alloy | Heerka Daxalka ee Shaybaarka Kariska Sulfuric Acid Solution Mils/Sannad (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) | Lama tijaabin | 17 (0.4) |
Cadaadiska-Daxalka Dilaaca
Maadada sare ee nikkel ee Alloy 825 waxay siisaa iska caabin heer sare ah oo ka dhan ah koloraydhka-dillaaca-dillaaca. Si kastaba ha noqotee, baaritaanka chloride magnesium ee karkarinaya aadka u daran, daawadu waxay dillaaci doontaa ka dib marka la soo bandhigo muddada dheer ee boqolleyda shaybaarada. Alloy 825 ayaa si aad u fiican u qabata shaybaarada shaybaarka ee ka sii daran. Jadwalka soo socda ayaa soo koobaya waxqabadka alloy-ga.
Iska caabinta chloride Cadaadiska Daxalka Dilaaca
| Alloy Tijaabiyay sidii Muunadaha U-Qaloocan | ||||
| Xalka Tijaabada | Alloy 316 | SSC-6MO | Alloy 825 | Alloy 625 |
| 42% Magnesium Chloride (Karin) | Fashilan | Isku dhafan | Isku dhafan | iska caabi |
| 33% Lithium Chloride (Karin) | Fashilan | iska caabi | iska caabi | iska caabi |
| 26% Sodium chloride (karrin) | Fashilan | iska caabi | iska caabi | iska caabi |
Isku qas - Qayb ka mid ah shaybaarada la tijaabiyay ayaa ku guuldareystay 2000 saacadood ee baaritaanka. Tani waa calaamad muujinaysa heer sare oo iska caabin ah.
Iska-caabbinta
Maaddada chromium iyo molybdenum-ka ee Alloy 825 waxay bixisaa iska caabin heer sare ah oo ka hortagga godad koloriin ah. Sababtan awgeed alwaaxyada waxaa looga faa'iidaysan karaa jawiga koloriin sare sida biyaha badda. Waxa loo isticmaali karaa ugu horrayn codsiyada meelaha godadyada qaarkood loo dulqaadan karo. Way ka fiican tahay birta caadiga ah ee aan caadiga ahayn sida 316L, si kastaba ha ahaatee, codsiyada biyaha badda Alloy 825 ma bixiso heerar la mid ah iska caabbinta SSC-6MO (UNS N08367) ama Alloy 625 (UNS N06625).
Iska caabinta Daxalka Crevice
Iska caabinta xinjirowga chloride iyo daxalka abuurista
| Alloy | Heerkulka Bilawga ee Crevice Weerarka Daxalka* °F (°C) |
| 316 | 27 (-2.5) |
| 825 | 32 (0.0) |
| 6MO | 113 (45.0) |
| 625 | 113 (45.0) |
* Habka ASTM G-48, 10% Ferric Chloride
Iska caabinta daxalka intergranular
| Alloy | Karkari 65% Nitric Acid ASTM Habka A 262 Dhaqanka C | Karkari 65% Nitric Acid ASTM Habka A 262 Dhaqanka 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) | Lama tijaabin |
