ALLOY 825 BAYANIN BAYANIN DATA
Bayanin Samfura
Akwai kauri don Alloy 825:
| 3/16" | 1/4" | 3/8" | 1/2" | 5/8" | 3/4" |
| 4.8mm | 6.3mm ku | 9.5mm ku | 12.7mm | 15.9mm | 19mm ku |
|
| |||||
| 1" | 1 1/4" | 1 1/2" | 1 3/4" | 2" |
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| 25.4mm | 31.8mm | 38.1mm | 44.5mm | 50.8mm |
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Alloy 825 (UNS N08825) shine austenitic nickel-iron-chromium gami tare da ƙari na molybdenum, jan karfe da titanium. An ƙirƙira shi don samar da juriya na musamman a cikin oxidizing da rage mahalli. Alloy ɗin yana da juriya ga damuwa na chloride-lalacewar fatattaka da rami. Bugu da ƙari na titanium yana tabbatar da Alloy 825 a kan hankali a cikin yanayin da aka haɗa da shi yana yin gami da juriya ga hare-haren intergranular bayan bayyanar yanayin zafi a cikin kewayon da zai wayar da kan bakin karfe marasa ƙarfi. Ƙirƙirar Alloy 825 shine nau'i na nau'i na nickel-base alloys, tare da kayan da ake iya tsarawa da kuma walƙiya ta hanyoyi daban-daban.
Takaddun Takaddama
don Alloy 825 (UNS N08825)
W.Nr. 2.4858:
Alloy ɗin Nickel-Iron-Chromium Austenitic An Ƙirƙira don Tsarewar Lalacewa Na Musamman A cikin Haɗakarwa da Rage Muhalli
● Abubuwan Gabaɗaya
● Aikace-aikace
● Matsayi
● Nazarin Sinadarai
● Abubuwan Jiki
● Kayayyakin Injini
● Juriya na Lalata
● Juriya-lalata Fashewa
● Juriya
● Ƙarƙashin Ƙarƙashin Ƙira
● Juriya na Lalata na Intergranular
Gabaɗaya Properties
Alloy 825 (UNS N08825) shine austenitic nickel-iron-chromium gami tare da ƙari na molybdenum, jan karfe da titanium. An haɓaka shi don ba da juriya na musamman ga wurare masu lalata da yawa, duka oxidizing da ragewa.
Abubuwan da ke cikin nickel na Alloy 825 suna sa shi juriya ga fashewar damuwa-lalacewar chloride, kuma haɗe da molybdenum da jan ƙarfe, yana ba da ingantaccen juriya na lalata a rage yanayin idan aka kwatanta da na al'ada austenitic bakin karfe. Abubuwan chromium da molybdenum na Alloy 825 suna ba da juriya ga pitting chloride, da juriya ga yanayi iri-iri na oxidizing. Bugu da ƙari na titanium yana tabbatar da gami da haɓakawa a cikin yanayin as-welded. Wannan ƙarfafawa yana sa Alloy 825 juriya ga harin intergranular bayan fallasa a cikin kewayon zafin jiki wanda yawanci zai wayar da kan bakin karfe marasa ƙarfi.
Alloy 825 ne resistant zuwa lalata a cikin wani m iri-iri na tsari muhallin ciki har da sulfuric, sulfurous, phosphoric, nitric, hydrofluoric da Organic acid da alkalis kamar sodium ko potassium hydroxide, da acidic chloride mafita.
Ƙirƙirar Alloy 825 shine nau'i na nau'i na nickel-base alloys, tare da kayan aiki da sauri da kuma walƙiya ta hanyoyi daban-daban.
Aikace-aikace
● Kula da Gurbacewar iska
● Masu gogewa
● Kayan aikin sarrafa sinadarai
● Acids
● Alkali
● Kayan Aikin Abinci
● Makaman nukiliya
● Sake sarrafa mai
● Abubuwan Narkar da Man Fetur
● Gudanar da Sharar gida
● Haɓakar mai da iskar gas a cikin teku
● Masu Musanya Zafin Ruwan Teku
● Tsarin Bututu
● Abubuwan Gas Mai tsami
● sarrafa ma'adinai
● Kayan Aikin Tace Tagulla
● Gyaran Man Fetur
● Masu musayar zafi masu sanyaya iska
● Kayan Aikin Karfe
● Ƙunƙarar zafi
● Tankuna
● Crates
● Kwanduna
● Sharar gida
● Tsarin Bututun Rijiyar allura
Matsayi
ASTM.................B 424
ASME.......SB 424
Binciken Sinadarai
Yawan Mahimmanci (Nauyi %)
| Nickel | 38.0 min.-46.0 max. | Iron | 22.0 min. |
| 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. | Carbon | 0.05 max. |
| Niobium (da Tantalum) | 3.15 min.-4.15 max. | Titanium | 0.40 |
| Carbon | 0.10 | Manganese | 1.00 max. |
| Sulfur | 0.03 max. | Siliki | 0.5 max. |
| Aluminum | 0.2 max. |
|
Abubuwan Jiki
Yawan yawa
0.294 lbs/in3
8.14 g/cm 3
Takamaiman Zafi
0.105 BTU/lb-°F
440 J/kg-°K
Modulus na Elasticity
28.3 psi x 106 (100F)
196 MPa (38°C)
Halin Magnetic
1.005 Oersted (μ a 200H)
Thermal Conductivity
76.8 BTU/hr/ft2/ft-°F (78°F)
11.3 W/m-°K (26°C)
Rawan narkewa
2500 - 2550 ° F
1370 - 1400 ° C
Resistivity na Lantarki
678 Ohm kewaye mil/ft (78°F)
1.13 μcm (26°C)
Lissafin Lissafi na Ƙarfafawar thermal
7.8 x 10-6 a / in°F (200°F)
4m/m°C (93°F)
Kayayyakin Injini
Kayayyakin Injini na Wuta na Musamman, Annealed Mill
| Ƙarfin Haɓaka 0.2% Ragewa | Ƙarshen Tensile Ƙarfi | Tsawaitawa in 2 in. | Tauri | ||
| psi (min.) | (MPa) | psi (min.) | (MPa) | % (minti) | Rockwell B |
| 49,000 | 338 | 96,000 | 662 | 45 | 135-165 |
Alloy 825 yana da kyawawan kaddarorin inji daga cryogenic zuwa yanayin zafi mai matsakaici. Fuskantar yanayin zafi sama da 1000°F (540°C) na iya haifar da canje-canje ga ƙananan tsarin da zai rage ductility da ƙarfi sosai. Don haka, Alloy 825 bai kamata a yi amfani da shi ba a yanayin zafi inda kaddarorin ɓarkewa sune abubuwan ƙira. Ana iya ƙarfafa gami sosai ta aikin sanyi. Alloy 825 yana da ƙarfin tasiri mai kyau a zafin jiki, kuma yana riƙe da ƙarfinsa a yanayin zafi na cryogenic.
Tebur na 6 - Ƙarfin Tasirin Hoto Maɓalli Mai Kyau
| Zazzabi | Gabatarwa | Ƙarfin Tasiri* | ||
| °F | °C |
| ft-lb | J |
| Daki | Daki | Tsayi | 79.0 | 107 |
| Daki | Daki | Canza | 83.0 | 113 |
| -110 | -43 | Tsayi | 78.0 | 106 |
| -110 | -43 | Canza | 78.5 | 106 |
| -320 | -196 | Tsayi | 67.0 | 91 |
| -320 | -196 | Canza | 71.5 | 97 |
| -423 | -253 | Tsayi | 68.0 | 92 |
| -423 | -253 | Canza | 68.0 | 92 |
Juriya na Lalata
Mafi kyawun sifa na Alloy 825 shine kyakkyawan juriya na lalata. A cikin duka oxidizing da rage mahalli, gami yana tsayayya da lalata gabaɗaya, pitting, lalatawar ɓarna, lalatawar intergranular da damuwa-lalacewar chloride.
Juriya ga Maganin Sulfuric Acid Laboratory
| Alloy | Matsakaicin Lalata a cikin Tafafuwar Laboratory Sulfuric Acid Maganin Mils/Shekara (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) | Ba a Gwaji ba | 17 (0.4) |
Juriya-lalata Fashewa
Babban abun ciki na nickel na Alloy 825 yana ba da juriya mai ban mamaki ga fashewar damuwa-lalata. Koyaya, a cikin gwaji mai tsananin tafasa na magnesium chloride, gami zai fashe bayan dogon fallasa a cikin adadin samfuran. Alloy 825 yana yin aiki mafi kyau a cikin ƙananan gwaje-gwajen dakin gwaje-gwaje. Tebur mai zuwa yana taƙaita aikin gami.
Juriya ga Damuwar Chloride Lalacewar Cracking
| Gwajin Alloy azaman Samfuran U-Bend | ||||
| Magani Gwaji | Alamar 316 | Saukewa: SSC-6MO | Farashin 825 | Farashin 625 |
| 42% Magnesium Chloride (Tafasa) | Kasa | Gauraye | Gauraye | Yi tsayayya |
| 33% Lithium Chloride (Tafasa) | Kasa | Yi tsayayya | Yi tsayayya | Yi tsayayya |
| 26% Sodium Chloride (Tafasa) | Kasa | Yi tsayayya | Yi tsayayya | Yi tsayayya |
Mixed - Wani ɓangare na samfuran da aka gwada sun kasa a cikin awanni 2000 na gwaji. Wannan nuni ne na babban matakin juriya.
Resistance Pitting
Abubuwan chromium da molybdenum na Alloy 825 suna ba da babban matakin juriya ga pitting chloride. A saboda wannan dalili ana iya amfani da gami a cikin yanayin chloride mai girma kamar ruwan teku. Ana iya amfani dashi da farko a aikace-aikace inda za'a iya jure wasu rami. Ya fi na al'ada bakin karfe irin su 316L, duk da haka, a cikin aikace-aikacen ruwan teku Alloy 825 baya samar da matakan juriya kamar SSC-6MO (UNS N08367) ko Alloy 625 (UNS N06625).
Juriya Lalacewar Crevice
Juriya ga Pitting Chloride da Crevice Corrosion
| Alloy | Zazzabi na Farko a Crevice Harin Lalata* °F (°C) |
| 316 | 27 (-2.5) |
| 825 | 32 (0.0) |
| 6MO | 113 (45.0) |
| 625 | 113 (45.0) |
* Hanyar ASTM G-48, 10% Ferric Chloride
Juriya Lalacewar Intergranular
| Alloy | Tafasa 65% Nitric Acid ASTM Tsarin A262 Practice C | Tafasa 65% Nitric Acid ASTM Tsarin A 262 Practice B |
| 316 | 34 (.85) | 36 (.91) |
| 316l | 18 (.47) | 26 (.66) |
| 825 | 12 (.30) | 1 (.03) |
| Saukewa: SSC-6MO | 30 (.76) | 19 (.48) |
| 625 | 37 (.94) | Ba a Gwaji ba |
