Ib tug neeg yuav khoom los ntawm German tshuaj cog tau xa peb RFQ lub hli dhau los nrog ib daim ntawv uas tau pib sib tham ntev: "Peb ib txwm tau teev C276 rau peb cov kua qaub, tab sis peb tus kws pab tswv yim corrosion hais tias C22 yog qhov kev xaiv zoo dua rau cov kev pabcuam no. Nws yog qhov zoo, tab sis tsis muaj leej twg ntawm peb pab pawg tau siv C22 hauv cov yeeb nkab. Koj puas tuaj yeem taug kev peb los ntawm vim li cas?"
Cov lus nug ntawd - "vim li cas C22, thiab thaum twg?" - tuaj ntau zaus dua li cov neeg muag khoom feem ntau lees paub.Hastelloy C276tau ua lub neej ntawd nickel alloy rau kev siv tshuaj lom neeg rau ntau xyoo lawm, thiab vim li cas zoo. Tab sis C22 tsis yog kev lag luam hloov kho. Nws yog ib qho sib txawv chemistry tsim los rau cov kev pabcuam sib txawv, thiab nyob rau hauv qhov chaw zoo nws ua tau zoo tshaj C276 los ntawm qhov ntsuas tau. Nyob rau hauv qhov tsis ncaj ncees lawm ib puag ncig, qhia tias nws nkim nyiaj.
Kab lus no teb yim cov lus nug uas cov neeg yuav khoom nug tiag tiag thaum lawv xav txogAlloy C22 yeeb nkabthawj zaug - chemistry, corrosion data, as-welded performance, sizes, price, and when to stay with C276 hloov. Tag nrho cov khoom, tsis muaj filler.
Cov Khoom Muag Khoom
Bar & Rod
Phaj & Ntawv
Coil & Sawb
Tube & Tube
Haum: Flange, Tee, Luj Tshib, Reducer thiab lwm yam.
Forging: Nplhaib, Ncej, Vajvoog, Thaiv thiab lwm yam.
Q1: Peb ib txwm siv C276. Vim li cas peb thiaj hloov mus rau C22?
VimHastelloy C22muaj ntau cov chromium thiab C276 muaj molybdenum ntau dua, thiab qhov sib txawv no tseem ceeb thaum koj qhov kev pabcuam oxidizing lossis sib xyaw ua ke -oxidizing- txo qis dua li kev txo qis.
C276 tau tsim los rau kub hydrochloric acid, chlorine ntub dej, thiab txo qis cov xwm txheej - ib puag ncig uas molybdenum ua qhov hnyav nqa. C22 tau tsim tom qab nrog qhov sib txawv: ntau chromium rau oxidizing xov xwm, me ntsis molybdenum tab sis tseem muaj ntau, thiab ib qho kev sib tw hlau uas ua rau cov vuam kub- thaj tsam cuam tshuam ntau dua rau kev tawm tsam intergranular.
Yog tias koj qhov kev pabcuam yog concentrated HCl ntawm qhov kub thiab txias, C276 tseem yog cov lus teb zoo. Yog tias koj qhov kev pabcuam cuam tshuam nrog oxidizing acids, cov kua qaub sib xyaw, flue gas desulfurization slurries, los yog teb -welded yeeb nkab uas tsis tuaj yeem post-weld solution annealed, C22 khwv tau nws cov nqi them - thiab tus nqi tsis tsawg.
Q2: Dab tsi yog qhov txawv ntawm chemistry?
Lub rooj sib sau qhia zaj dab neeg. Cov lej uas tseem ceeb yog chromium thiab molybdenum - thiab lawv txav mus rau qhov sib txawv ntawm ob qib.
| Element | C22 (UNS N06022) | C276 (UNS N10276) | Qhov txawv txhais li cas |
|---|---|---|---|
| Chromium | 20.0 – 22.5 | 14.5 – 16.5 | C22 muaj ~ 37% ntau Cr → muaj zog zaj duab xis passive hauv oxidizing media |
| Molybdenum | 12.5 – 14.5 | 15.0 – 17.0 | C276 muaj ~ 18% ntau Mo → zoo dua hauv kev txo cov kua qaub |
| Tungsten | 2.5 – 3.5 | 3.0 – 4.5 | Zoo sib xws; ob leeg siv W rau pitting kuj |
| Cov pa roj carbon | Tsawg dua lossis sib npaug li 0.015 | Tsawg dua lossis sib npaug li 0.010 | Ob leeg qis; C276 qis me ntsis |
| Hlau | 2.0 – 6.0 | 4.0 – 7.0 | C22 qis me ntsis |
| Nickel | Tshuav | Tshuav | Tib lub hauv paus |
| PREN (xws li) | ~ 65 | ~ 69 | C276 muaj ntau dua pitting kuj sib npaug |
Qhov nce chromium hauv C22 tsis yog nce ntxiv - nws yog 37% dhia hla C276. Qhov ntawd yog dab tsi muab C22 nws ntug hauv oxidizing acids, chlorine ntub dej nrog oxidizing impurities, thiab sib tov -acid txheej txheem kwj qhov twg cov chemistry tsis huv txo. Qhov txo qis molybdenum yog tiag tiag tab sis me me - C22 tseem nqa 12.5-14.5% Mo, uas yog ntau tshaj li cov nickel alloys feem ntau. Cov txiaj ntsig zoo: Alloy C22 txi ib qho me me ntawm kev txo qis -acid kev ua tau zoo kom tau txais ntau cov oxidizing thiab sib xyaw- kev ua haujlwm ib puag ncig.
Q3: C22 zoo npaum li cas hauv kev pabcuam oxidizing? Muab tus lej rau kuv.
Qhov no yog cov lus nug feem ntau cov nplooj ntawv xa tawm dodge, vim tias lawv tsis muaj cov ntaub ntawv tus nqi corrosion. Nov yog.
Qhov kev ntsuam xyuas cuam tshuam rau kev tiv thaiv kev tiv thaiv intergranular hauv Ni-Cr-Mo alloys yog ASTM G28. Txoj Kev A siv cov boiling ferric sulfate-sulfuric acid (ib qho oxidizing test nruab nrab), thiab txoj kev B siv boiling ferric chloride-hydrochloric acid (ntau dua, sim pitting thiab intergranular resistance).
| ASTM G28 Kev Xeem | C22 Corrosion Rate (mm / xyoo) | C276 Corrosion Rate (mm / xyoo) | Txhais lus |
|---|---|---|---|
| Txoj Kev A (oxidizing nruab nrab) | ~ 0.30 | ~ 0.50 – 0.60 | C22 yog ~ 40% qis → zoo dua oxidizing - nruab nrab kuj |
| Method B (nraug sib xyaw) | ~ 3.0 | ~ 3.5 – 4.0 | C22 yog me ntsis zoo dua hauv kev sib xyaw ua ke |
| ASTM G48 Txoj Kev A (pitting, CPT) | 105-115 ° C | 115-125 ° C | C276 muaj me ntsis siab dua CPT → marginally zoo dua ntshiab pitting |
| ASTM G48 Txoj Kev B (crevice, CCT) | ~ 75-85 degree | ~ 70-80 degree | C22 muaj me ntsis siab dua CCT → marginally zoo dua nyob rau hauv crevice tej yam kev mob |
G48 pitting tus lej yuav ua rau koj xav tsis thoob: C276 muaj qhov kub siab tshaj qhov kub siab tshaj C22, vim C276 siab dua molybdenum thiab tungsten thawb PREN mus rau ~ 69 piv rau C22's ~ 65. Tab sis G28 Txoj Kev A tus lej qhia rau lwm ib nrab ntawm zaj dab neeg - hauv qhov nruab nrab oxidizing test, C22 corrodes ~ 40% tsawg dua C276. Qhov ntawd yog qhov zoo ntawm chromium hauv kev ua.
Cov tswv yim coj mus rau cov yeeb nkab: yog tias koj cov kab nqa oxidizing acids (nitric, chromic, ferric chloride nrog oxidizers) los yog cov txheej txheem sib xyaw uas cov chemistry viav vias ntawm oxidizing thiab txo, C22's G28A kom zoo dua txhais tau lub neej ntev dua. Yog tias koj cov kab muaj cov ntsiab lus HCl, C276 siab dua PREN thiab Mo cov ntsiab lus yeej.
Q4: Yuav ua li cas txog li -welded kev ua tau zoo? Peb tsis tuaj yeem tshaj tawm -weld anneal hauv daim teb.
Qhov no yog qhov twg C22 cais los ntawm C276 rau cov kav dej, thiab nws yog ib qho laj thawj uas peb pom cov neeg yuav khoom kho dua tshiab.
Ob leeg C22 thiab C276 yog tsawg-carbon alloys uas tsis xav tau tom qab-weld tshav kub kho rau carbide nag lossis daus vim li cas. Qhov sib txawv yog nyob rau hauv lub vuam cua sov- cuam tshuam cheeb tsam (HAZ) corrosion kuj. C276, thaum welded, muaj peev xwm tsim ib tug nqaim band ntawm carbide thiab intermetallic precipitates ntawm grain ciam teb nyob rau hauv lub HAZ. Cov qhab no raug cuam tshuam rau intergranular nres hauv kev tawm tsam hnyav - ib qho teeb meem uas tsis tshwm sim hauv kev sim hlau hauv paus tab sis tshwm sim hauv kev pabcuam, feem ntau ntawm cov vuam.
C22 yog chemistry-engineered los suppress HAZ nag lossis daus no. Qhov tshwm sim yog ntsuas tau: cov ntaub ntawv luam tawm ntawm C22 hauv cov tshuaj chloride siab heev-cov kab mob sib xyaw ua ke-acid ib puag ncig (feem ntau FGD cov xwm txheej) qhia HAZ corrosion tus nqi ntawm 0.04 - 0.07 mm / xyoo - qhov tseem ceeb sib piv cov hlau puag. C276 nyob rau tib lub sijhawm qhia HAZ tus nqi 2 - 3 × siab dua nws cov hlau puag.
Rau daim teb -welded yeeb nkab spools - qhov twg koj tsis tuaj yeem muab lub rooj sib txoos rau hauv lub cub tawg rau kev daws teeb meem annealing - qhov no yog qhov txiav txim siab. Cov nroj tsuag tshuaj German ua haujlwm sib xyaw ua ke - cov txheej txheem kua qaub los ntawm cov yeeb nkab khib tsis tuaj yeem yooj yim tshaj tawm -weld anneal ib 6-nti teb weld. C22 cia koj hla cov kauj ruam ntawd nrog kev ntseeg siab.Alloy C276nyob rau hauv tib qhov teeb meem xav tau ib tug tsim nyog WPS nrog nruj heev kub input tswj, los yog ib tug ncej -weld tov anneal uas tej zaum yuav ua tsis tau rau lub cev.
Qhov no yog vim li cas tus neeg yuav khoom tus neeg saib xyuas corrosion tau pom zoo C22: lawv cov kev pabcuam yog sib xyaw oxidizing-txo cov kua qaub, thiab lawv cov yeeb nkab khiav yog teb-welded spools hauv cov nroj tsuag uas twb muaj lawm. C276 yuav ua haujlwm, tab sis C22's HAZ kom zoo dua tshem tawm cov kev ua haujlwm tsis ua haujlwm uas tau ua rau xau hauv lawv cov kab laus C276.
Q5: Puas yog C22 raug nqi ntau dua? Ntau npaum li cas?
Yog lawm. C22 feem ntau nqa 10 - 15% tus nqi tshaj C276 hauv me me - txoj kab uas hla (NPS 1/2" - 4"), nqaim mus rau 5 - 10% hauv qhov loj dua. Tus nqi them los ntawm ob qhov chaw: tsawg dua cov ntim ntau lawm (C276 muaj kev lag luam dav dav) thiab cov ntsiab lus chromium ntau dua.
Tab sis cov nqi khoom siv tsuas yog ib feem ntawm cov nqi sib npaug. Yog tias C22 tshem tawm qhov yuav tsum tau tshaj tawm -weld solution anneal - thiab rau teb -welded spools nyob rau hauv ib tsob nroj uas twb muaj lawm, nws feem ntau ua - cov fabrication nqi txuag tau tshaj cov khoom premium. Ib qho kev tshaj tawm -weld solution anneal on a pipe spool txhais tau hais tias lub sij hawm ntawm lub cub tawg, kev thauj mus los, thiab lub sij hawm cuam tshuam. Hla nws vim C22's HAZ tsis xav tau nws yog qhov twg cov nyiaj tiag.
Qhov thim rov qab kuj muaj tseeb: yog tias koj qhov kev pabcuam tau txo qis thiab C276 ua haujlwm ntawm tus nqi qis dua nrog kev ua haujlwm sib npaug, kev kho dua tshiab rau C22 yog siv nyiaj rau chemistry koj yuav tsis siv. Qhov kev txiav txim siab yuav tsum tau tsav los ntawm kev pabcuam, tsis yog los ntawm lub npe alloy.
Q6: Qhov ntau thiab tsawg thiab cov ntaub ntawv kuv tuaj yeem xaj?
C22 yeeb nkab muaj nyob rau hauv tib cov ntaub ntawv thiab cov qauv raws liC276- ASTM specifications npog ob qib tib yam.
| Daim ntawv | Txuj | Hom kab mob |
|---|---|---|
| Seamless yeeb nkab | ASTM B622 / ASME SB622 | NPS 1/2 "- 24" (DN15 - 600), Sch 5S - XXS |
| Welded yeeb nkab | ASTM B619 / ASME SB619 Cov khoom siv | Loj diameters, Chav 1 lossis Chav Kawm 2 |
| Welded raj | ASTM B626 / ASME SB626 | Thaum tshav kub kub exchanger thiab instrumentation tube |
| Txiav qhov ntev | - | Random (3 - 7 m) lossis tsau rau kev kos duab, tiaj lossis bevelled ib ASME B16.25 |
Feem ntau cov lus nug peb lis yog rau ASTM B622 seamless yeeb nkab hauv NPS 1/2 "mus rau 6", Sch 40S thiab 80S, tshuaj annealed. Rau cov khoom siv hluav taws xob sib txuas hauv oxidizing lossis sib xyaw ua ke -acid kev pabcuam, ASTM B626 raj yog qhov kev hu ib txwm- tawm. Yog tias koj daim duab qhia txog ASME code, qhia SB version (SB622 / SB619).
Filler metal for C22 welding is ERNiCrMo-10 (AWS A5.14). Tsis txhob siv C276 muab tub lim (ERNiCrMo-4) ntawm C22 lub hauv paus hlau - chemistry mismatch swb HAZ kom zoo dua koj them rau.
Q7: Thaum twg kuv yuav tsum nyob nrog C276 hloov kho dua tshiab?
Paub tias thaum twg tsis hloov kho yog tsim nyog ntau tshaj li qhov luv nqi. Nyob nrog C276 thaum:
Cov kev pabcuam yog concentrated hydrochloric acid ntawm qhov kub thiab txias.C276's siab dua molybdenum (15-17%) muab nws ib qho ntug hauv cov kua qaub ntshiab. C22 txaus tab sis tsis zoo ntawm no.
Cov kev pabcuam yog txo kom tsis muaj oxidizing excursions.Yog hais tias tus txheej txheem kwj yeej tsis swings oxidizing, C22's chromium kom zoo dua yog tsis siv.
Koj xav tau qhov siab tshaj pitting kuj nyob rau hauv cov ntshiab chloride.C276's PREN (~69) siab dua C22's (~65). Rau seawater pitting ib leeg, C276 muaj ib tug marginal ntug - tab sis nyob rau hauv kev xyaum ob qho tib si loj heev tshaj - tshwj xeeb rau seawater yeeb nkab.
Muaj thiab lub sijhawm ua haujlwm yog qhov tseem ceeb.C276 muaj cov khoom lag luam thoob ntiaj teb. Yog tias lub sijhawm ua haujlwm tsis tuaj yeem tos C22 zeb yob, C276 yog qhov kev xaiv pragmatic.
Koj tab tom hloov ib ntu hauv kab C276 uas twb muaj lawm.Qhov sib txawv ntawm cov hlau welds ntawm C22 thiab C276 tuaj yeem ua tau, tab sis rau qhov zoo li -rau- zoo li hloov, sib piv cov khoom uas twb muaj lawm yog yooj yim dua.
Yog tias tsis muaj cov xwm txheej no siv tau, thiab koj qhov kev pabcuam cuam tshuam nrog cov oxidizing acids, cov kwj sib xyaw, lossis teb -welded spools, C22 yog qhov kev pom zoo ntawm engineering ncaj ncees.
Q8: Kuv yuav ua li cas thiaj paub tseeb tias kuv tau txais C22 tiag?
Peb daim tshev xa tuaj, tib yam li C276 tab sis nrog cov lej sib txawv:
MTR muaj pes tsawg leeg.Paub meej Cr 20.0–22.5%, Mo 12.5–14.5%, W 2.5–3.5%, C Tsawg dua lossis sib npaug li 0.015%. Daim ntawv pov thawj qhia chromium ntawm 16% yog C276, tsis yog C22 - qhov no yog qhov teeb meem kev hloov pauv ntau tshaj plaws, vim tias ob qib zoo tib yam lub cev.
PMI (XRF).Kev ntsuas ntsuas ntawm qhov ntau yuav tsum paub meej tias Cr/Mo ntiv tes. C22 nyeem pom ntau dua chromium dua C276 - qhov txawv yog qhov tseeb ntawm lub ntsuas ntsuas.
ASTM G28 Txoj Kev A daim ntawv pov thawj.Rau kev pabcuam tseem ceeb, thov G28A corrosion tus nqi ntawm daim ntawv pov thawj. Tus nqi nyob ib ncig ntawm 0.3 hli / xyoo yog raws li qhov zoo ntawm C22. Tus nqi siab dua 0.6 hli / xyoo qhia tias kev kho cua sov tsis raug lossis cov khoom tsis raug.
FAQ
Puas yog Hastelloy C22 zoo dua C276?
Tsis yog universally zoo dua. C22 zoo dua nyob rau hauv oxidizing thiab sib tov -oxidizing- txo kev pab cuam thiab nyob rau hauv raws li -welded fabrications. C276 yog qhov zoo dua nyob rau hauv cov ntshiab txo cov kua qaub thiab muaj marginally siab pitting kuj. Lo lus nug yog "qhov twg haum rau kuv qhov kev pabcuam?"
Ua tauC22 cevsiv nyob rau hauv seawater?
Yog - ob qho tib si C22 thiab C276 yog qhov zoo tshaj plaws hauv dej hiav txwv. C22 muaj qhov kub siab tshaj qhov tseem ceeb tshaj plaws, uas tseem ceeb hauv cov pob qij txha flanged thiab hauv qab - thaj chaw tso nyiaj. Rau feem ntau cov yeeb nkab dej hiav txwv, ob qho hlau alloy yog ntau tshaj qhov txaus, thiab kev xaiv yog tsav los ntawm kev pabcuam tshuaj lom neeg thib ob thiab muaj.
Puas yog C22 yeeb nkab xav tau tom qab-weld cua sov kho?
No. C22 yog tsim los rau raws li -welded kev pab cuam - nws chemistry suppresses HAZ nag lossis daus uas cuam tshuam rau C276. Qhov no yog ib qho ntawm cov laj thawj tseem ceeb uas cov neeg yuav khoom hloov kho los ntawm C276 mus rau C22 rau daim teb -welded yeeb nkab spools.
Qhov kev pabcuam siab tshaj plaws rau C22 yeeb nkab yog dab tsi?
Rau kev pabcuam corrosion, kwv yees li 650 degree. Nyob rau hauv tas li ntawd, lub thib ob theem precipitate thiab corrosion kuj poob. Rau kev tsim siab, kos ASME Tshooj II Tshooj D tso cai rau kev ntxhov siab ntawm koj qhov ntsuas kub.
Dab tsi muab hlau hlau kuv siv rau vuam C22 yeeb nkab?
ERNiCrMo-10 (AWS A5.14). Tsis txhob siv C276 muab tub lim (ERNiCrMo-4) ntawm C22 - chemistry mismatch txo qhov zoo li-welded HAZ corrosion kuj koj them rau.
Xav txog C22 yeeb nkab rau oxidizing, tov-acid, lossis teb-welded kev pabcuam?
HUITONG cov khoom sivHastelloy C22(UNS N06022, 2.4602) seamless thiab welded yeeb nkab rau ASTM B622/B619 nrog EN 10204 3.1/3.2 MTC, PMI pov thawj, thiab ASTM G28 daim ntawv pov thawj ntawm kev thov. Xa koj daim ntawv teev loj thiab cov kev pabcuam raumarket@htpipe.comlos yog WhatsApp+86-19339900201- thiab yog C276 yog qhov zoo dua rau koj qhov kev pabcuam, peb yuav qhia koj ua ntej koj them rau kev hloov kho koj tsis xav tau.
