ASTM B668yog tus qauv kev tshwj xeeb rau"UN tsis muaj N08028 Seamless Tube"Cov. (Hauv kev lag luam kev lag luam, "raj" thiab "yeeb nkab" los ntawm tus qauv no feem ntau siv rau kev siv hluav taws xob siab).
Tus qauv no txhais tau qhov yuav tsum tau rau seamless, txias {{} ua haujlwm, lossis kub} {{1} {{Unrical N08029yog ib qho ntsig txog, txhim kho cov ntsiab lus ntawm N08028 thiab feem ntau tau txais lossis teev nyob hauv lub moj khaum ntawm tus qauv ntawm tus qauv no vim nws cov khoom zoo tshaj.
Tus qauv tswj hwm cov tshuaj lom neeg muaj pes tsawg leeg, cov khoom siv neeg siv neeg, thiab kuaj cov kav dej no.
Cov kws tshaj lij
7x24 teev khoom xa tuaj
Cov Khoom Siv Tshuaj Muaj
Cov khoom lag luam tensile yuav tsum tau ua
Cov yam ntxwv tseem ceeb thiab muaj pes tsawg
Cov tub ntxhais sib txawv ntawm cov lus dag nyob rau hauv qhov optimized christister ntawm n08029, uas txhim kho nws cov kev ua tau zoo.
| Yam zoo | Unic tsis ntseeg N08028 (Alloy 28) | Unic tsis ntseeg N08029 (Alloy 29) |
|---|---|---|
| Qhov tseem ceeb muaj pes tsawg leeg | ~ 31% ni, 27% cr,3.5% mo, ~ 1% Cu | ~ 31% ni, 26% cr,4.0% mo, ~ 1% Cu |
| Ntxiv ntxiv | ~0.02% N | ~0.25% N |
| Tus loj li txiv plig | ~38 | ~42 |
| Cov yam ntxwv tseem ceeb | Zoo heev rau cov sulfuric acid, phosphoric acid, thiab cov chloride tsis zoo. | Ibntxiv ua kerau n08028 nrog ntau dua mo & n, uas ua rauLub zog zoo dua thiab pitting. |
| Thawj kom tau txais | Tus pov thawj, tus nqi -} kev daws rau cov sulfuric kev pab cuam. | Txhim kho pitting / crevice tsis kam thiab siab dua ib ce muaj zog tshaj n08028. |
| Kev sib txheeb | Tus thawj / hauv paus alloy. | Niaj hnub nimno, txhim kho cov version nrog kev ua kom tau zoo. |
Vim li cas cov nitrogen (n) nyob rau hauv n08029 yog qhov tseem ceeb:
Qhov tseem ceeb ntxiv ntawm 0.25% nitrogen muab ob qhov txiaj ntsig loj:
Cov tshuaj muaj zog zog:Dramatically nce tawm los thiab tensile lub zog nyob rau hauv anealed mob.
Txhim kho qhov pitting resistance:Kev ncaj qha rau tus nqi Pren, ua rau nws tiv taus ntau dua chloride -}} induced thiab crevice corrosion.
Cov Khoom Siv Khoom thiab Kev Siv
1. Corrosion Kuj:
Sulfuric acid tiv:Nov yog thawj daim ntawv thov rau cov alloys. Lawv muab cov tshuaj tsw qab rau cov sulfuric acid thoob plaws ntawm cov ntau thiab qhov kub thiab txias, outperforming txheem stainless hlau zoo li 316L tseem ceeb.
Phosphoric acid:Zoo heev, txawm nyob hauv ib puag ncig fluorinated pom nyob rau hauv cov kev tsim khoom.
Chloride kev ntxhov siab corrosion cracking (SCC):Zoo heev tsis kam vim yog cov ntsiab lus npib tsib xee (~ 31%).
Pitting & colevice corrosion:Zoo rau kev tsis kam zoo, nrog N08029 tau ntsuas tau zoo dua rau nws lub siab Molybdenum thiab nitrogen cov ntsiab lus.
2.
Lub zog tensile:85 - 110 ksi (590 - 760 mpa)
Tos lub zog (0.2% offset):40 - 60 ksi (275 - 415 mpa)
Elongation:35% yam tsawg kawg (hauv 2 nti / 50 hli)
(N08029 yuav xwm yeem ua tiav qhov tseem ceeb ntawm qhov siab dua ntawm lub zog no ntau vim yog nitrogen ntxiv dag zog.)
3. Cov Kev Siv Cov Khoom Siv Ntau Yam:
Tshuaj lom neeg:Piping, kev hloov cua sov, thiab reactors hauv sulfuric acid thiab phosphoric acid produring nroj tsuag.
Petrochemical Kev Lag Luam:Tuav txhoj puab cov txheej txheem ntws.
Pulp & Daim Ntawv Kev Lag Luam:Cov neeg zom thiab cov khoom siv ua kom ua kom tau cov pa roj thiab ua kom dawb.
Vienution Control:Scrubbers, ducting, thiab qhov hluav taws xob sib tsoo hauv flue roj desulfurization (FGD) tshuab.
Roj & Roj:Downhole thiab saum npoo av nyob rau hauv cov kev pab qaub (h₂s muaj) ib puag ncig.
Cim npe nrov: ASTM B668 Unic N08028 / n08029 Seamless Yeeb Nkab, Tuam Tshoj Astm B6628 / N08029 Seamless Yeeb Nkab Cov Chaw Tsim Tshuaj, Chaw muag khoom, Hoobkas
