ASTM A 265, B 366, B 463
B 464, B 471, B 472, B 473
B 474, B 475
UNS N 08020
NACE MR 0175
Lwm cov npe uas nquag: Kws Ntoo 20, 20 Cb-3®, Incoloy® alloy 20
Alloy 20, tseem hu ua Carpenter 20, yog npib tsib xee-hlau-chromium austenitic uas tau tsim los rau qhov muaj zog tshaj plaws rau cov kua qaub tiv thaiv, tshwj xeeb leej faj sulfuric acid. Thissuperalloy muaj qhov ua tau zoo rau kev xeb, pitting, thiab xeb hauv cov tshuaj uas muaj chlorides thiab sulfuric, phosphoric, thiab nitric. Nws tseem muaj niobium rau kev ruaj khov tiv thaiv kev ua kom tiav thiab muaj txiaj ntsig intergranular xeb. Kws ntoo 20 ua ke nrog kev txhim kho zoo corrosion nrog lub zog kho tshuab thiab qhov yooj yim yooj yim. Txawm hais tias thaum chiv thawj tsim los siv nyob rau hauv sulfuric acid ntsig txog kev lag luam, Alloy 20 tam sim no yog qhov kev xaiv nrov rau ntau qhov kev lag luam nrog rau kev siv tshuaj, zaub mov, kws tshuaj, thiab kev lag luam yas. Tsis tas li ntawd, cov superalloy no yog siv rau hauv cov khoom siv cua sov, sib tov cov tso tsheb hlau luam, hlau ntxuav thiab cov khoom siv pickling, thiab xa cov kav dej.
Tau ntev los sib cav txog seb Tus Kws ntoo 20 puas xeb hlau los yog xeb nickel vim tias cov ntsiab lus nickel yog nyob rau ntawm ciam teb ntawm kev txhais nws li ib txoj kev los sis lwm qhov. Yog li, nyob ntawm seb koj tham nrog cov alloy no tuaj yeem raug xa mus raws li alloy 20 Stainless Hlau lossis raws li nickel alloy. Txoj kev twg los nws tseem yog qhov zoo rau kev xeb.
Hauv cov ntawv zoo li cas Alloy 20 Muaj Pab?
• Ntawv
• Phaj
• Bar
• Yeeb& Txoj raj (welded& seamless)
• Cov khoom siv (xws li flanges, plam-ons, dig muag, caj dab-caj dab, ncej puab, caj dab ntev ntev, txuas lub qhov taub, lub lauj tshib, tees, txhav kawg, rov qab, lub kaus mom, hla, reducers, thiab cov leeg ntawm lub raj mis)
• Hlau
Dab tsi yog cov yam ntxwv ntawm Alloy 20?
• Muaj kev tiv thaiv zoo tshaj ntawm cov tshuaj tiv thaiv sulfuric acid
• Zoo heev tiv taus chloride kev nyuaj siab corrosion cracking
• Cov khoom siv zoo heev thiab kev tsim khoom
• Tsawg zaus los nag carbide thaum los nag hlau
• Ua kom zoo tshaj plaws thaum ua kom cov xeb rau cov kua roj sulfuric acids
Tshuaj lom neeg Muaj pes tsawg leeg,%
| N |
Fe |
Cr |
Cu |
Mo |
Nb |
|
32.00-38.00
|
Sib npaug |
19.0-21.0
|
3.0-4.0
|
2.0-3.0
|
8 xC-1.0max |
|
C
|
Mn |
P
|
S
|
Si |
| . 07 max |
2. 0max |
. 045 max |
. 035 max |
1. 0max |
Hauv kev siv dab tsi yog Alloy 20 siv?
• Cov khoom tsim hluavtaws roj hmab
• Ua cov tshuaj, plastics thiab organic thiab tshuaj lom neeg hnyav
• Cov tso tsheb hlau luam, xa dej, hloov cov cua sov, twj, tso dej, thiab lwm yam khoom siv txheej txheem
• Ua kua qaub los tiv thaiv cov kua qaub
• Kev ua tshuaj lom neeg cov raj xa dej, cov khoom siv roj reactor
• Cov kaus mom npuas
• Cov cuab yeej siv Petrochemical
• Kev tsim khoom noj thiab zas
ASTM Cov Lus Qhia
| Yeeb Smls |
Yeeb Nkab Welded |
Raj Smls |
Tube Welded |
Ntawv / Phaj |
Bar |
Forging |
Haum |
|
B729
|
B464
|
B729
|
B468
|
B463
|
B473
|
B462
|
B366
|
Mechanical zog
Khoom Siv Tsis Txaus
| Daim Ntawv |
Tensile Min. |
Tos Min. (. 2% offset) |
Elongation Min. |
Yuav Txo Thaj Chaw Min. |
| Bar (kub lossis txias tiav) |
80 ksi |
35 ksi |
30%
|
50%
|
| Ntawv / Phaj |
80 ksi |
35 ksi |
30%
|
-
|
* Incoloy® yog cov ntawv sau npe ntawm Kev Lag Luam Tshwj Xeeb Hlau pab pawg ntawm Cov tuam txhab.
