ALOY 825 AWỌN NIPA DATA
ọja Apejuwe
Awọn sisanra ti o wa fun 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" |
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| 25.4mm | 31.8mm | 38.1mm | 44.5mm | 50.8mm |
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Alloy 825 (UNS N08825) jẹ austenitic nickel-iron-chromium alloy pẹlu awọn afikun ti molybdenum, Ejò ati titanium.O ti ni idagbasoke lati pese iyasọtọ ipata ni mejeeji oxidizing ati idinku awọn agbegbe.Awọn alloy jẹ sooro si kiloraidi wahala-ipata wo inu ati pitting.Afikun ti titanium ṣe iduroṣinṣin Alloy 825 lodi si ifamọ ni ipo bi-welded ti n ṣe alloy sooro si ikọlu intergranular lẹhin ifihan si awọn iwọn otutu ni iwọn ti yoo ṣe akiyesi awọn irin alagbara ti ko ni iduroṣinṣin.Awọn iṣelọpọ ti Alloy 825 jẹ aṣoju ti nickel-base alloys, pẹlu ohun elo ti o wa ni imurasilẹ ati ki o weldable nipasẹ awọn ọna ẹrọ pupọ.
Pasito dì
fun Alloy 825 (UNS N08825)
W.Nr.2.4858:
Ohun Austenitic Nickel-Iron-Chromium Alloy Ti A Ṣe idagbasoke fun Atako Ibajẹ Iyatọ Ni Afẹmisi ati Idinku Awọn Ayika
● Awọn ohun-ini gbogbogbo
● Awọn ohun elo
● Àwọn ìlànà
● Iṣiro Kemikali
● Awọn ohun-ini Ti ara
● Mechanical Properties
● Atako Ibajẹ
● Wahala-Ibajẹ Atako Resistance
● Atako Pitting
● Crevice Ipata Resistance
● Intergranular Ipata Resistance
Gbogbogbo Properties
Alloy 825 (UNS N08825) jẹ austenitic nickel-iron-chromium alloy pẹlu awọn afikun ti molybdenum, Ejò ati titanium.O ti ni idagbasoke lati pese atako alailẹgbẹ si ọpọlọpọ awọn agbegbe ibajẹ, mejeeji oxidizing ati idinku.
Akoonu nickel ti Alloy 825 jẹ ki o sooro si idamu-pipata kiloraidi, ati ni idapo pẹlu molybdenum ati bàbà, pese imudara ipata ti o ni ilọsiwaju ni idinku awọn agbegbe nigba akawe si awọn irin alagbara austenitic ti aṣa.Awọn akoonu chromium ati molybdenum ti Alloy 825 n pese resistance si pitting kiloraidi, bakanna bi atako si ọpọlọpọ awọn oju-aye oxidizing.Awọn afikun ti titanium ṣe idaduro alloy lodi si ifamọ ni ipo bi-welded.Iduroṣinṣin yii jẹ ki Alloy 825 sooro si ikọlu intergranular lẹhin ifihan ni iwọn otutu eyiti yoo ṣe akiyesi deede awọn irin alagbara ti ko ni iduroṣinṣin.
Alloy 825 jẹ sooro si ipata ni ọpọlọpọ awọn agbegbe ilana pẹlu sulfuric, sulfurous, phosphoric, nitric, hydrofluoric ati Organic acids ati alkalis gẹgẹbi iṣuu soda tabi potasiomu hydroxide, ati awọn solusan chloride acidic.
Awọn iṣelọpọ ti Alloy 825 jẹ aṣoju ti nickel-base alloys, pẹlu ohun elo ni imurasilẹ fọọmu ati weldable nipasẹ ọpọlọpọ awọn imuposi.
Awọn ohun elo
● Iṣakoso Idoti afẹfẹ
● Àwọn amúnisìn
● Awọn Ohun elo Ṣiṣẹpọ Kemikali
● Awọn acids
● Alkalis
● Ohun elo Ilana Ounjẹ
● Apanirun
● Ṣiṣe atunṣe epo
● Idana Ano Dissolvers
● Mimu Egbin
● Ti ilu okeere Epo ati Gas Production
● Awọn Oluyipada Ooru Omi Omi
● Awọn ọna fifin
● Ekan Gas irinše
● Ṣiṣakoṣo irin
● Ohun elo Isọdọtun Ejò
● Ṣiṣepo epo
● Awọn olupaṣipaarọ Ooru ti afẹfẹ
● Irin Pickling Equipling
● Alapapo Coils
● Awọn ojò
● Awọn apoti
● Awọn agbọn
● Ìsọnù Ìdọ̀tí
● Abẹrẹ Daradara Pipa Systems
Awọn ajohunše
ASTM.................B 424
ASME.................SB 424
Kemikali onínọmbà
Awọn iye Aṣoju (Iwọn%)
| Nickel | 38.0 min.-46.0 max. | Irin | 22.0 iṣẹju. |
| Chromium | 19.5 min.-23,5 max. | Molybdenum | 2.5 min.-3.5 max. |
| Molybdenum | 8.0 iṣẹju-10.0 max. | Ejò | 1.5 min.-3.0 max. |
| Titanium | 0.6 min – 1.2 max. | Erogba | 0.05 ti o pọju. |
| Niobium (pẹlu Tantalum) | 3.15 iṣẹju-4.15 max. | Titanium | 0.40 |
| Erogba | 0.10 | Manganese | 1.00 ti o pọju. |
| Efin | ti o pọju 0.03. | Silikoni | 0.5 ti o pọju. |
| Aluminiomu | 0.2 ti o pọju. |
|
Ti ara Properties
iwuwo
0.294 lbs/in3
8,14 g / cm3
Ooru pato
0,105 BTU/lb-°F
440 J/kg-°K
Modulu ti Elasticity
28.3 psi x 106 (100°F)
196 MPa (38°C)
Oofa Permeability
1.005 Oersted (μ ni 200H)
Gbona Conductivity
76.8 BTU/wakati/ft2/ft-°F (78°F)
11.3 W/m-°K (26°C)
Yo Range
2500 – 2550°F
1370 – 1400°C
Itanna Resistivity
678 Ohm ayika mil/ft (78°F)
1.13 μcm (26°C)
Olusọdipalẹ Laini ti Imugboroosi Gbona
7.8 x 10-6 ni / ni°F (200°F)
4 m/m°C (93°F)
Darí Properties
Aṣoju yara otutu Mechanical Properties, Mill Annealed
| Agbara Ikore 0.2% aiṣedeede | Gbẹhin fifẹ Agbara | Ilọsiwaju ninu 2 in. | Lile | ||
| psi (min.) | (MPa) | psi (min.) | (MPa) | % (iṣẹju.) | Rockwell B |
| 49.000 | 338 | 96,000 | 662 | 45 | 135-165 |
Alloy 825 ni awọn ohun-ini ẹrọ ti o dara lati cryogenic si awọn iwọn otutu giga niwọntunwọnsi.Ifihan si awọn iwọn otutu ti o ju 1000°F (540°C) le ja si awọn ayipada si microstructure ti yoo dinku ductility ati agbara ipa.Fun idi yẹn, Alloy 825 ko yẹ ki o lo ni awọn iwọn otutu nibiti awọn ohun-ini rupture jẹ awọn ifosiwewe apẹrẹ.Awọn alloy le ti wa ni okun substantially nipa tutu iṣẹ.Alloy 825 ni agbara ipa to dara ni iwọn otutu yara, ati pe o da agbara rẹ duro ni awọn iwọn otutu cryogenic.
Table 6 - Charpy Keyhole Ipa Agbara ti Awo
| Iwọn otutu | Iṣalaye | Agbara Ipa* | ||
| °F | °C |
| ft-lb | J |
| Yara | Yara | Gigun | 79.0 | 107 |
| Yara | Yara | Yipada | 83.0 | 113 |
| -110 | -43 | Gigun | 78.0 | 106 |
| -110 | -43 | Yipada | 78.5 | 106 |
| -320 | -196 | Gigun | 67.0 | 91 |
| -320 | -196 | Yipada | 71.5 | 97 |
| -423 | -253 | Gigun | 68.0 | 92 |
| -423 | -253 | Yipada | 68.0 | 92 |
Ipata Resistance
Ẹya ti o ṣe pataki julọ ti Alloy 825 jẹ resistance ipata ti o dara julọ.Ninu mejeeji oxidizing ati idinku awọn agbegbe, alloy koju ipata gbogbogbo, pitting, ibajẹ crevice, ipata intergranular ati idaamu-ibajẹ kiloraidi.
Resistance si yàrá Sulfuric Acid Solusan
| Alloy | Oṣuwọn Ibajẹ ni Sise Ile-iyẹwu Sise Sulfuric Acid Solution Mils/Ọdun (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) | Ko Idanwo | 17 (0.4) |
Wahala-Ibaje Resistance Cracking
Awọn akoonu nickel ti o ga ti Alloy 825 n pese resistance to dara julọ si wahala-ibajẹ kiloraidi.Sibẹsibẹ, ninu idanwo iṣuu magnẹsia kiloraidi ti o gbona pupọju, alloy yoo kiraki lẹhin ifihan pipẹ ni ipin kan ti awọn ayẹwo.Alloy 825 ṣe dara julọ ni awọn idanwo yàrá ti ko lagbara.Awọn wọnyi tabili akopọ awọn alloy ká iṣẹ.
Resistance si Ibajẹ Wahala kiloraidi
| Alloy Idanwo bi U-tẹ Awọn ayẹwo | ||||
| Ojutu Igbeyewo | Alloy 316 | SSC-6MO | Alloy 825 | Alloy 625 |
| 42% magnẹsia kiloraidi (gbigbo) | Ikuna | Adalu | Adalu | koju |
| 33% Litiumu kiloraidi (Sisun) | Ikuna | koju | koju | koju |
| 26% iṣuu soda kiloraidi (gbigbo) | Ikuna | koju | koju | koju |
Adalu - Apa kan ti awọn ayẹwo idanwo kuna ni awọn wakati 2000 ti idanwo.Eyi jẹ itọkasi ipele giga ti resistance.
Pitting Resistance
Awọn akoonu chromium ati molybdenum ti Alloy 825 n pese ipele giga ti resistance si pitting kiloraidi.Fun idi eyi a le lo alloy ni awọn agbegbe kiloraidi giga gẹgẹbi omi okun.O le ṣee lo nipataki ni awọn ohun elo nibiti diẹ ninu awọn pitting le farada.O ga ju awọn irin alagbara ti o wọpọ gẹgẹbi 316L, sibẹsibẹ, ni awọn ohun elo omi okun Alloy 825 ko pese awọn ipele kanna ti resistance bi SSC-6MO (UNS N08367) tabi Alloy 625 (UNS N06625).
Crevice Ipata Resistance
Resistance si Chloride Pitting ati Crevice Ipata
| Alloy | Awọn iwọn otutu ti Ibẹrẹ ni Crevice Ikọlu Ipaba* °F (°C) |
| 316 | 27 (-2.5) |
| 825 | 32 (0.0) |
| 6MO | 113 (45.0) |
| 625 | 113 (45.0) |
* Ilana ASTM G-48, 10% Ferric kiloraidi
Intergranular Ipata Resistance
| Alloy | Sise 65% Nitric Acid ASTM Ilana A 262 Iwa C | Sise 65% Nitric Acid ASTM Ilana A 262 Iwa 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) | Ko Idanwo |
