ALLOY 825 MATERIAL DATA MAPEPA
Product Description
Ukobvu huripo hweAlloy 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) is an austenitic nickel-iron-chromium alloy ine mawedzero emolybdenum, mhangura uye titanium. Yakagadzirwa kuti ipe yakasarudzika corrosion kuramba mune zvese oxidizing uye kuderedza nharaunda. Iyo alloy inoshingirira kune chloride stress-corrosion kuputika uye gomba. Kuwedzerwa kwetitanium kunodzikamisa Alloy 825 kupesana nekukurudzira mune se-welded mamiriro ichiita kuti alloy irambe ichirwisa intergranular kurwisa mushure mekuratidzwa kune tembiricha mumutsara unogonesa simbi isina kugadzikana isina kugadzikana. Kugadzirwa kweAlloy 825 kwakajairwa nickel-base alloys, ine zvinhu zviri nyore kuumbwa uye zvinogoneka neakasiyana maitiro.
Specification Sheet
yeAlloy 825 (UNS N08825)
W.Nr. 2.4858:
Iyo Austenitic Nickel-Iron-Chromium Alloy Yakagadzirirwa Kusarudzika Corrosion Resistance Muzvese Oxidizing uye Kuderedza nharaunda.
● General Properties
● Applications
● Mipimo
● Kuongorora Kwemakemikari
● Zvinhu Zvenyama
● Mechanical Properties
● Kuramba Kuora
● Stress-Corrosion Cracking Resistance
● Kusada Kuramba
● Crevice Corrosion Resistance
● Intergranular Corrosion Resistance
General Properties
Alloy 825 (UNS N08825) is an austenitic nickel-iron-chromium alloy ine mawedzero emolybdenum, mhangura uye titanium. Yakagadzirwa kuti ipe kupikisa kwakasarudzika kune dzakawanda nharaunda dzinoparadza, zvese oxidizing uye kuderedza.
Iyo nickel yemukati yeAlloy 825 inoita kuti isamirire chloride stress-corrosion cracking, uye yakasanganiswa nemolybdenum nemhangura, inopa yakanyanya kunatsiridza kusadzivirirwa kwekuora mukuderedza nharaunda kana ichienzaniswa neyakajairwa austenitic simbi isina tsvina. Iyo chromium uye molybdenum zviri mukati meAlloy 825 inopa kuramba kune chloride pitting, pamwe nekuramba kune akasiyana siyana oxidizing atmospheres. Kuwedzerwa kwetitanium kunodzikamisa iyo alloy kupesana nekunzwa mune se-welded mamiriro. Kudzikamisa uku kunoita kuti Alloy 825 irambe ichirwisa kurwisa kwemukati megranular mushure mekuratidzwa mukati metembiricha renji izvo zvaizoita kuti simbi isina kugadzikana isina kugadzikana.
Alloy 825 inoshingirira mukuora munzvimbo dzakasiyana siyana dzinosanganisira sulfuric, sulfurous, phosphoric, nitric, hydrofluoric uye organic acids uye alkalis akadai sodium kana potassium hydroxide, uye acidic chloride mhinduro.
Kugadzirwa kweAlloy 825 kwakajairwa nickel-base alloys, ine zvinhu zviri nyore kuumbwa uye zvinogoneka neakasiyana maitiro.
Applications
● Kudzora Kusvibiswa Kwemhepo
● Vanokwesha
● Chemical Processing Equipment
● Asidhi
● Alkalis
● Zvokudya Zvokudya
● Nuclear
● Kugadziridza Mafuta
● Fuel Element Dissolvers
● Kubata tsvina
● Offshore Oil uye Gasi Kugadzirwa
● Seawater Heat Exchangers
● Magadzirirwo epombi
● Sour Gasi Zvikamu
● Ore Processing
● Copper Refining Equipment
● Petroleum Refining
● Air-yakatonhorera Heat Exchangers
● Steel Pickling Equipment
● Makoiri ekupisa
● Matangi
● Makareti
● Mabhasikiti
● Kurasa tsvina
● Injection Well Piping Systems
Mitemo
ASTM..................B 424
ASME..................SB 424
Chemical Analysis
Zvakajairwa (Huremu %)
| 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. | Mhangura | 1.5 min.–3.0 max. |
| Titanium | 0.6 min.–1.2 max. | Carbon | 0.05 max. |
| Niobium (pamwe neTantalum) | 3.15 min.-4.15 max. | Titanium | 0.40 |
| Carbon | 0.10 | Manganese | 1.00 max. |
| Sulfur | 0.03 max. | Silicon | 0.5 max. |
| Aluminium | 0.2 max. |
|
Zvinhu Zvenyama
Density
0.294 lbs/mu3
8.14 g/cm3
Specific Heat
0.105 BTU/lb-°F
440 J/kg-°K
Modulus yeElasticity
28.3 psi x 106 (100°F)
196 MPa (38°C)
Magnetic Permeability
1.005 Oersted (μ pa200H)
Thermal Conductivity
76.8 BTU/awa/ft2/ft-°F (78°F)
11.3 W/m-°K (26°C)
Melting Range
2500 - 2550°F
1370 - 1400°C
Electrical Resistivity
678 Ohm circ mil/ft (78°F)
1.13 μ cm (26°C)
Linear Coefficient yeThermal Expansion
7.8 x 10-6 mukati / mu°F (200°F)
4 m/m°C (93°F)
Mechanical Properties
Typical Room Temperature Mechanical Properties, Mill Annealed
| Goho Simba 0.2% Offset | Ultimate Tensile Simba | Elongation mu2in. | Kuoma | ||
| psi (min.) | (MPa) | psi (min.) | (MPa) | % (min.) | Rockwell B |
| 49,000 | 338 | 96,000 | 662 | 45 | 135-165 |
Alloy 825 ine yakanaka mechanical zvivakwa kubva cryogenic kusvika zvine mwero tembiricha. Kuratidzira kune tembiricha iri pamusoro pe1000 ° F (540 ° C) inogona kukonzera shanduko kune iyo microstructure iyo inozodzikisa zvakanyanya ductility uye kukanganisa simba. Nechikonzero ichocho, Alloy 825 haifanirwe kushandiswa patembiricha apo zvinokambaira-kuputika zvivakwa ndizvo zvekugadzira zvinhu. Iyo alloy inogona kusimbiswa zvakanyanya nebasa rinotonhora. Alloy 825 ine simba rekuita zvakanaka patembiricha yekamuri, uye inochengeta simba rayo patembiricha ye cryogenic.
Tafura 6 - Charpy Keyhole Impact Simba rePlate
| Tembiricha | Orientation | Impact Simba* | ||
| °F | °C |
| ft-lb | J |
| Room | Room | Longitudinal | 79.0 | 107 |
| Room | Room | Transverse | 83.0 | 113 |
| -110 | -43 | Longitudinal | 78.0 | 106 |
| -110 | -43 | Transverse | 78.5 | 106 |
| -320 | -196 | Longitudinal | 67.0 | 91 |
| -320 | -196 | Transverse | 71.5 | 97 |
| -423 | -253 | Longitudinal | 68.0 | 92 |
| -423 | -253 | Transverse | 68.0 | 92 |
Corrosion Resistance
Chimiro chakatanhamara cheAlloy 825 ndiyo yakanakisa corrosion kuramba. Mune ese ari maviri oxidizing uye kudzikisira nharaunda, iyo alloy inopikisa general corrosion, pitting, crevice corrosion, intergranular corrosion uye chloride stress-corrosion cracking.
Kupokana kune Laboratory Sulfuric Acid Solutions
| Alloy | Corrosion Rate muBoiling Laboratory Sulfuric Acid Solution Mils/Gore (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) | Not Tested | 17 (0.4) |
Stress-Corrosion Cracking Resistance
Iyo yakakwira nickel yemukati yeAlloy 825 inopa yakanakisa kuramba kune chloride kusagadzikana-corrosion kuparuka. Nekudaro, mune yakanyanya kubikira magnesium chloride bvunzo, iyo alloy ichatsemuka mushure mekuratidzwa kwenguva refu muchikamu chemasampuli. Alloy 825 inoita zvirinani mukuyedzwa kwakanyanya murabhoritari. Tafura inotevera inopfupikisa mashandiro echisanganiswa.
Kupokana neChloride Stress Corrosion Cracking
| Alloy Yakaedzwa seU-Bend Samples | ||||
| Test Solution | Alloy 316 | SSC-6MO | Alloy 825 | Alloy 625 |
| 42% Magnesium Chloride (Kubika) | Fail | Mixed | Mixed | Resist |
| 33% Lithium Chloride (Kubika) | Fail | Resist | Resist | Resist |
| 26% Sodium Chloride (Kubika) | Fail | Resist | Resist | Resist |
Yakasanganiswa - Chikamu chemasampuli akaedzwa chakakundikana mumaawa e2000 ekuedzwa. Ichi chiratidzo chepamusoro-soro yekupikisa.
Pitting Resistance
Iyo chromium uye molybdenum yemukati yeAlloy 825 inopa yakakwira mwero wekupokana kune chloride pitting. Nechikonzero ichi alloy inogona kushandiswa munzvimbo dzakakwirira dzechloride semvura yegungwa. Inogona kushandiswa zvakanyanya mumashandisirwo ayo mamwe magomba anogona kuregererwa. Iyo yakakwirira kune yakajairwa simbi isina tsvina yakadai se316L, zvisinei, mumvura yegungwa maapplication Alloy 825 haipe iwo mazinga akafanana ekupikisa seSSC-6MO (UNS N08367) kana Alloy 625 (UNS N06625).
Crevice Corrosion Resistance
Kupokana neChloride Pitting uye Crevice Corrosion
| Alloy | Tembiricha yeKutanga paCrevice Corrosion Attack* °F (°C) |
| 316 | 27 (-2.5) |
| 825 | 32 (0.0) |
| 6MO | 113 (45.0) |
| 625 | 113 (45.0) |
*ASTM Maitiro G-48, 10% Ferric Chloride
Intergranular Corrosion Resistance
| Alloy | Kubika 65% Nitric Acid ASTM Maitiro A 262 Maitiro C | Kubika 65% Nitric Acid ASTM Maitiro A 262 Maitiro 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) | Not Tested |
