ASTM B622 UNS N08031 Yeeb Nkab, feem ntau hu ua Alloy 31 (1.4562), yog nickel-raws li alloy uas muaj kev tiv thaiv corrosion zoo heev nyob rau hauv ib puag ncig corrosive heev. Nws txuas qhov sib txawv ntawm super austenitic stainless hlau thiab npib tsib xee-raws li alloys thiab yog ib qho txiaj ntsig zoo. Tiv tauj peb, Alloy 31 Cov neeg muab khoom, yog xav paub ntxiv thiab nqe lus pub dawb!
Alloy 31 Chemical Composition
- Nickel (Ni) 30 0–32.0
- Chromium (Cr) 26.0–28.{3}}
- Molybdenum (Mo) 6.0–7.0
- Hlau (Fe) Balance
- Nitrogen (N) {{0}}.15–0.25
- Tooj liab (Cu) 1.0–1.4
- Cov pa roj carbon (C) Tsawg dua lossis sib npaug rau 0.015
Alloy 31 Corrosion Resistance
- Txhawm rau oxidizing thiab txo cov kua qaub
- Sulfuric Acid: zoo heev nyob rau hauv concentrated sulfuric acid mus txog 60 degree.
- Hydrochloric Acid: Nruab nrab corrosion kuj, nyob ntawm qhov concentration thiab kub.
- Chloride Solutions: Zoo heev pitting thiab crevice corrosion tiv thaiv.
Alloy 31 Mechanical Strength
- Tensile Strength Ntau dua lossis sib npaug li 650 MPa
- Yield zog (0.2% offset) Ntau dua lossis sib npaug li 350 MPa
- Elongation (hauv 50mm) Ntau dua lossis sib npaug li 35%
- Hardness (Brinell) Tsawg dua los yog sib npaug rau 250 HB
Kev sib piv nrog cov khoom sib xws
| Khoom | Alloy 31 | alloy 625 | luj 904l |
|---|---|---|---|
| Corrosion Resistance | Zoo heev | Siab heev | Siab |
| Lub zog | Siab | Nruab nrab | Nruab nrab |
| Qhov kub thiab txias | Txog li 600 degree | Mus txog 980 degree | Mus txog 450 degree |
| Nqi Efficiency | Tus nqi siab | kim | Nqi-zoo |
Daim ntawv thov ntawm ASTM B622 UNS N08031
- Kev Siv Tshuaj: Siv rau hauv cov nroj tsuag tsim cov kua qaub, tshwj xeeb tshaj yog cov cuab yeej siv rau kev tuav sulfuric thiab phosphoric acids
- Petrochemical kev lag luam: Hauv refineries thiab natural gas nroj tsuag
- Desalination nroj tsuag
- Kev tswj cov pa phem
- Flue gas desulfurization (FGD) systems
Qhov kub thiab txias
- Kub kub: Kwv yees li 600 degree (1112 degree F) rau kev siv tas mus li.
- Cryogenic: Ua kom cov ductility thiab toughness txawm nyob rau qhov kub thiab txias.
UNS N08031 Fabrication thiab Vuam
- Machinability: Yuav tsum muaj cov cuab yeej carbide rau kev ua haujlwm zoo.
- Weldability: Tau tshaj cov txheej txheem vuam xws li TIG, MIG, thiab SMAW.
Alloy Khoom Muaj Cov Ntawv:
- Seamless yeeb nkab thiab raj
- Phaj, ntawv, thiab strip
- Bar, rov
- Fittings thiab flanges
