I-ALLOY 825 I-MATERIAL DATA ASHEETS
Ingcaciso yeMveliso
Ubunzima obukhoyo beAlloy 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 |
|
I-alloy 825 (UNS N08825) yi-austenitic nickel-iron-chromium alloy kunye nezongezo ze-molybdenum, ubhedu kunye ne-titanium. Yaphuhliswa ukubonelela ukuxhathisa okungaqhelekanga kokutya kuzo zombini i-oxidizing kunye nokunciphisa okusingqongileyo. I-alloy iyamelana noxinzelelo lwe-chloride-i-corrosion cracking kunye ne-pitting. Ukongezwa kwe-titanium kuzinzisa i-Alloy 825 ngokuchasene ne-sensitization kwi-as-welded condition eyenza i-alloy imelane nokuhlaselwa kwe-intergranular emva kokuvezwa kwamaqondo obushushu kuluhlu oluya kuvuselela iintsimbi ezingenazinzile. Ukwenziwa kwe-Alloy 825 kufana ne-nickel-base alloys, kunye nezinto eziphathekayo ngokulula kunye ne-weldable ngeendlela ezahlukeneyo.
Iphepha lokuchaza
yeAlloy 825 (UNS N08825)
W.Nr. 2.4858:
I-Austenitic Nickel-Iron-Chromium Alloy iphuhliselwe ukuxhathisa okugqwesileyo kokuRhakala kuzo zombini i-Oxidizing kunye nokuNcitshiswa kwemekobume.
● Iipropati ngokuBanzi
● Izicelo
● Imilinganiselo
● Uhlalutyo lweMichiza
● Izinto Zomzimba
● IiPropati zoomatshini
● Ukumelana nokuMhlwa
● Uxinzelelo lwe-Corrosion Cracking Resistance
● Ukunganyangeki
● I-Crevice Corrosion Resistance
● I-Intergranular Corrosion Resistance
Iipropati ngokuBanzi
I-alloy 825 (UNS N08825) yi-austenitic nickel-iron-chromium alloy kunye nezongezo ze-molybdenum, ubhedu kunye ne-titanium. Yaphuhliswa ukunika ukuxhathisa okukhethekileyo kwiindawo ezininzi ezinobungozi, zombini i-oxidizing kunye nokunciphisa.
Umxholo we-nickel we-Alloy 825 wenza ukuba imelane noxinzelelo lwe-chloride-i-corrosion cracking, kwaye idityaniswe ne-molybdenum kunye nobhedu, ibonelela ngokuphucuka okukhulu kokuxhathisa kwe-corrosion ekunciphiseni okusingqongileyo xa kuthelekiswa neentsimbi eziqhelekileyo ze-austenitic stainless. Umxholo we-chromium kunye ne-molybdenum ye-Alloy 825 inikezela ukuxhathisa kwi-chloride pitting, kunye nokuchasana neentlobo ezahlukeneyo ze-oxidizing atmospheres. Ukongezwa kwe-titanium kuzinzisa i-alloy ngokuchasene ne-sensitization kwimeko ye-welded. Oku kuzinziswa kwenza i-Alloy 825 imelane nohlaselo lwe-intergranular emva kokuvezwa kuluhlu lweqondo lobushushu elinokuthi likhuthaze iintsimbi ezingenazinza ezingazinzanga.
I-alloy 825 iyamelana ne-corrosion kwiindawo ezahlukeneyo zenkqubo ezibandakanya i-sulfuric, i-sulfurous, i-phosphoric, i-nitric, i-hydrofluoric kunye ne-organic acids kunye ne-alkali ezifana ne-sodium okanye i-potassium hydroxide, kunye ne-acidic chloride solutions.
Ukwenziwa kwe-Alloy 825 kufana ne-nickel-base alloys, kunye nezinto eziphathekayo ngokulula kunye ne-weldable ngeendlela ezahlukeneyo.
Usetyenziso
● Ukulawula Ungcoliseko Lomoya
● Abakhuhla
● Izixhobo zokuLungisa iiKhemikhali
● Iiasidi
● Iialkali
● Izixhobo zeNkqubo yoKutya
● Inyukliya
● Ukulungiswa kwakhona kweFuel
● Izinyibilikisi zeNdalo yesibaso
● Ukuphatha Inkunkuma
● Ukuveliswa kweOli neGesi kunxweme
● IziXhobo zaManzi oLwandle
● IiNkqubo zemibhobho
● Izixhobo zegesi ezimuncu
● Ukulungiswa kwentsimbi
● Izixhobo zokusulungekisa ubhedu
● Ukucoca iPetroleum
● Ii-Heat Exchangers ezipholileyo
● IziXhobo zokuPickling zentsimbi
● Iikhoyili zokufudumeza
● Amatanki
● Amakhreyithi
● Iibhaskithi
● Ukulahlwa kwenkunkuma
● IiNkqubo zeMibhobho yokuTofa
Imigangatho
I-ASTM..................B 424
ASME..................SB 424
Uhlalutyo lweMichiza
Amaxabiso aqhelekileyo (Ubunzima %)
| Nickel | 38.0 imiz.–46.0 ubuninzi. | Intsimbi | 22.0 imiz. |
| Chromium | 19.5 min.–23.5 ubuninzi. | Molybdenum | 2.5 imizuzu.–3.5 ubuninzi. |
| Molybdenum | 8.0 min.-10.0 max. | Ubhedu | 1.5 imizuzu.–3.0 ubuninzi. |
| I-Titanium | 0.6 min.–1.2 ubuninzi. | Ikhabhoni | 0.05 ubuninzi. |
| I-Niobium (kunye neTantalum) | 3.15 min.-4.15 max. | I-Titanium | 0.40 |
| Ikhabhoni | 0.10 | IManganese | 1.00 ubuninzi. |
| Isulfure | 0.03 ubuninzi. | Isilicon | 0.5 ubuninzi. |
| Aluminiyam | 0.2 ubuninzi. |
|
Iipropati Zomzimba
Ukuxinana
0.294 lbs/in3
8.14 g/cm3
Ubushushu obuthile
0.105 BTU/lb-°F
440 J/kg-°K
Imodyuli yeElasticity
28.3 psi x 106 (100°F)
196 MPa (38°C)
IMagnetic Permeability
1.005 Oersted (μ ngo-200H)
I-Thermal Conductivity
76.8 BTU/iyure/ft2/ft-°F (78°F)
11.3 W/m-°K (26°C)
Uluhlu olunyibilikayo
2500 – 2550°F
1370 – 1400°C
Ukuxhathisa koMbane
678 Ohm circ mil/ft (78°F)
1.13 μ cm (26°C)
I-Linear Coefficient yoKwandiswa kweThermal
7.8 x 10-6 kwi / ku°F (200°F)
4 m / m°C (93°F)
Iipropati zoomatshini
IiPropati zeMechanical zeMechanical zeGumbi eziqhelekileyo, iMill Annealed
| Unikeze Amandla I-0.2% i-Offset | Ultimate Tensile Amandla | Ukwandisa kwi2 kwi. | Ukuqina | ||
| psi (imiz.) | (MPa) | psi (imiz.) | (MPa) | % (imiz.) | URockwell B |
| 49,000 | 338 | 96,000 | 662 | 45 | 135-165 |
I-alloy 825 ineempawu ezintle zoomatshini ukusuka kwi-cryogenic ukuya kumaqondo aphezulu aphezulu. Ukubonakaliswa kwamaqondo obushushu angaphezu kwe-1000 ° F (540 ° C) kunokubangela utshintsho kwi-microstructure eya kunciphisa kakhulu i-ductility kunye namandla empembelelo. Ngeso sizathu, i-alloy 825 akufuneki isetyenziswe kumaqondo obushushu apho iipropathi eziqhekekileyo ziyimiba yoyilo. I-alloy inokuqiniswa kakhulu ngomsebenzi obandayo. I-alloy 825 inamandla empembelelo entle kwiqondo lobushushu begumbi, kwaye igcina amandla ayo kumaqondo obushushu ecryogenic.
Itheyibhile 6 - Charpy Keyhole Impact Amandla ePlate
| Ubushushu | Ukuqhelaniswa | Amandla empembelelo* | ||
| °F | °C |
| ft-lb | J |
| Igumbi | Igumbi | Ixesha elide | 79.0 | 107 |
| Igumbi | Igumbi | Ukunqamleza | 83.0 | 113 |
| -110 | -43 | Ixesha elide | 78.0 | 106 |
| -110 | -43 | Ukunqamleza | 78.5 | 106 |
| -320 | -196 | Ixesha elide | 67.0 | 91 |
| -320 | -196 | Ukunqamleza | 71.5 | 97 |
| -423 | -253 | Ixesha elide | 68.0 | 92 |
| -423 | -253 | Ukunqamleza | 68.0 | 92 |
Ukunyangwa kokuMhlwa
Olona phawu lubalaseleyo lwe-Alloy 825 lukumelana nokugqwesa kwayo okugqwesileyo. Kuzo zombini i-oxidizing kunye nokunciphisa indawo, i-alloy iyamelana nokubola ngokubanzi, i-pitting, i-crevice corrosion, i-intergranular corrosion kunye ne-chloride yoxinzelelo-i-corrosion cracking.
Ukuchasana neLabhoratri yeSulfuric Acid Solutions
| Ingxubevange | Izinga lokuNxulumana kwiLebhu yokuBilisa kwiLebhu yeSulfuri yeSisombululo seMiles/uNyaka (mm/a) | ||
| 10% | 40% | 50% | |
| 316 | 636 (16.2) | >1000 (>25) | >1000 (>25) |
| 825 | 20 (0.5) | I-11 (0.28) | 20 (0.5) |
| 625 | 20 (0.5) | Ayivavanywa | 17 (0.4) |
Uxinzelelo-Umbhoshongo Ukuchasana nokuqhekeka
Umxholo we-nickel ophezulu we-Alloy 825 unika ukuxhathisa okuphezulu kwi-chloride yoxinzelelo-i-corrosion cracking. Nangona kunjalo, kuvavanyo olubi kakhulu lwe-magnesium chloride, i-alloy iya kuqhekeka emva kokuvezwa ixesha elide kwipesenti yeesampulu. I-alloy 825 iqhuba ngcono kakhulu kwiimvavanyo zaselabhoratri ezingenzima kangako. Le theyibhile ilandelayo ishwankathela ukusebenza kwe-alloy.
Ukumelana neChloride Stress Corrosion Cracking
| Ingxubevange Ivavanywe njengeeSampulu ze-U-Bend | ||||
| Isisombululo soVavanyo | Ingxubevange 316 | SSC-6MO | Ingxubevange 825 | Ingxubevange 625 |
| I-42% yeMagnesium Chloride (Ukubilisa) | Ukusilela | Ixutyiwe | Ixutyiwe | Nxhathisa |
| I-33% ye-Lithium Chloride (eBilayo) | Ukusilela | Nxhathisa | Nxhathisa | Nxhathisa |
| I-26% ye-Sodium Chloride (Ukubilisa) | Ukusilela | Nxhathisa | Nxhathisa | Nxhathisa |
Ukuxuba - Inxalenye yeesampuli ezivavanyiweyo aziphumelelanga kwiiyure ze-2000 zovavanyo. Oku kubonisa izinga eliphezulu lokuchasa.
Ukuchasa iPitting
Umxholo we-chromium kunye ne-molybdenum ye-Alloy 825 inikeza izinga eliphezulu lokumelana ne-chloride pitting. Ngesi sizathu ialloyi ingasetyenziswa kwiindawo ezinekloridi ephezulu njengamanzi olwandle. Ingasetyenziswa ikakhulu kwizicelo apho imingxuma ethile inokunyanyezelwa. Iphezulu kunezinsimbi eziqhelekileyo eziqhelekileyo ezifana ne-316L, nangona kunjalo, kwizicelo zamanzi olwandle I-Alloy 825 ayiboneleli ngamanqanaba afanayo okumelana ne-SSC-6MO (UNS N08367) okanye i-Alloy 625 (UNS N06625).
I-Crevice Corrosion Resistance
Ukumelana neChloride Pitting kunye neCrevice Corrosion
| Ingxubevange | Ubushushu bokuqalisa kwiCrevice Uhlaselo lokuCorrosion* °F (°C) |
| 316 | 27 (-2.5) |
| 825 | 32 (0.0) |
| 6MO | 113 (45.0) |
| 625 | 113 (45.0) |
* Inkqubo ye-ASTM G-48, i-10% ye-Ferric Chloride
I-Intergranular Corrosion Resistance
| Ingxubevange | Ukubilisa i-65% ye-Nitric Acid ASTM Inkqubo A 262 Inkqubo C | Ukubilisa i-65% ye-Nitric Acid ASTM Inkqubo A 262 Inkqubo B |
| 316 | 34 (.85) | 36 (.91) |
| 316L | Ishumi elinesibhozo (.47) | 26 (.66) |
| 825 | Ishumi elinesibini (.30) | 1 (.03) |
| SSC-6MO | 30 (.76) | 19 (.48) |
| 625 | 37 (.94) | Ayivavanywa |
