Hastelloy C22 (UNS N06022)thiabAlloy 20 (UNS N08020)sawv cev rau ob qhov kev daws teeb meem sib txawv rau kev daws cov teeb meem hnyav corrosive. Txawm hais tias ob qho tib si alloys muaj nyob rau hauv qeb ntawm npib tsib xee-raws li corrosion- cov ntaub ntawv tiv taus, lawv muaj qhov sib txawv tseem ceeb hauv kev tsim qauv kev xav, cov yam ntxwv ntawm microstructural thiab cov yam ntxwv ntawm lub cev.
Alloy 20 thiab alloy c22 phaj Lub cev thiab cov cuab yeej cuab tam
nickel alloy 20 thiab nickel alloy c22 ntom
Hastelloy C22 muaj qhov ceev dua (8.69 g / cm³), uas yog li 8.6% siab dua Alloy 20's 8.00 g / cm³. Cov cuab yeej no txhais tau tias C22 daim ntawv muaj qhov hnyav dua rau tib lub ntim.
UNS N08020 Phaj thiab UNS N06022 Phaj Thermal Properties
Nyob rau hauv cov nqe lus ntawm thermal zog, lub melting point ntau ntawm C22 (1325-1370 degree) yog me ntsis siab tshaj Alloy 20 (kwv yees 1390 degree), tab sis lub thermal expansion coefficient ntawm Alloy 20 (8.16 × 10⁻⁶ / degree) yog me ntsis qis dua C22 (kwv yees 9.0 ⁶ 7 / degree) Alloy 20 tuaj yeem pom qhov kev ruaj ntseg zoo dua nyob rau hauv qhov kub thiab txias.
hast. c22 phaj thiab alloy 20 daim ntawv Chav ntsuas kub txhua yam khoom
Hastelloy C22 phaj muaj lub zog ntau dua hauv cov tshuaj annealed lub xeev, thiab nws qhov tsawg kawg nkaus tensile lub zog (Ntau dua los yog sib npaug rau 690 MPa) thiab lub zog tawm los (Ntau dua lossis sib npaug rau 310 MPa) yog qhov siab dua Alloy 20 (551.6 MPa tensile zog, 241.3 MPa yield zog). Txawm li cas los xij, Alloy 20 qhia tau hais tias zoo dua ductility, thiab nws elongation ntawm so tuaj yeem ncav cuag 50%, uas siab dua C22's 45%.
N08020 phaj thiab n06022 daim ntawv tshuaj lom neeg muaj pes tsawg leeg sib piv
| Element | Hastelloy C22 | Alloy 20 |
| Ni | Ntau dua lossis sib npaug li 56 | 32.5-35.0 |
| Cr | 20.0-22.5 | 19.0-21.0 |
| Mo | 12.5-14.5 | 2.0-3.0 |
| W | 2.5-3.5 | - |
| Fe | 2.0-6.0 | - |
| Cu | - | 3.0-4.0 |
| Nb | - | Ntau dua lossis sib npaug rau 1.0 |
c22 alloy thiab 20 alloy phaj Comprehensive corrosion kev ua tau zoo sib piv
Ib puag ncig sulfuric acid:Nyob rau hauv sulfuric acid nrog ib tug concentration ntawm tsawg dua los yog sib npaug zos rau 70%, Alloy 20 qhia tau hais tias zoo heev corrosion kuj, thiab tus nqi corrosion feem ntau yog tsawg dua 0.1 hli / xyoo. Txawm li cas los xij, nyob rau hauv qhov kub ntawm 10% sulfuric acid ib puag ncig, tus nqi corrosion ntawm Alloy 20 yuav nce ntxiv mus rau ntau tshaj 0.5 hli / xyoo, thaum Hastelloy C22, nrog nws cov ntsiab lus molybdenum siab, tuaj yeem tswj tau qhov tsis tshua muaj corrosion tsawg dua los yog sib npaug rau 0.1 hli / xyoo.
Hydrochloric acid thiab lwm yam kev txo cov kua qaub:Hauv kev txo cov kua qaub ib puag ncig, hauv hydrochloric acid uas muaj cov tshuaj chloride (Ntau dua lossis sib npaug ntawm 1000 ppm) (kub Tsawg dua lossis sib npaug li 50 degree), tus nqi corrosion ntawm C22 tsawg dua lossis sib npaug li 0.3 hli / xyoo. Rau kev sib xyaw acid ib puag ncig, cov alloy siab muaj pes tsawg leeg ntawm C22 muab lub qhov rais ua haujlwm zoo dua qub, thaum Alloy 20 tuaj yeem ntsib kev pheej hmoo corrosion loj.
alloy 20 steel phaj thiab n06020 steel phaj Localized corrosion kuj
Pitting thiab crevice corrosion:Hastelloy C22 muaj qhov tseem ceeb pitting kub (CPT Ntau dua los yog sib npaug rau 85 degree) thiab qhov tseem ceeb crevice corrosion kub (CCT Ntau tshaj los yog sib npaug rau 65 degree) uas deb tshaj Alloy 20 (CPT yog hais txog 35-40 degree). Nyob rau hauv dej hiav txwv los yog siab chloride ion ib puag ncig, C22 daim hlau tuaj yeem siv nyab xeeb hauv cov xwm txheej hauv qab 85 degree, thaum Alloy 20 tsuas yog tsim rau ib puag ncig qis dua 50 degree.
Stress Corrosion Cracking (SCC):Hastelloy C22 showed no signs of cracking in 25% NaCl + 0.5% H₂S solution at 80°C tested according to NACE TM0177 standard. Alloy 20 relies on its 33% nickel content to provide good resistance to chloride ion stress corrosion, which is better than 304/316 stainless steel, but it may still crack in high temperature (>80 degree) thiab siab concentration chloride ib puag ncig.
astm alloy 20 phaj thiab astm hastelloy c22 Kub kub corrosion thiab tshwj xeeb ib puag ncig
Oxidizing media:Hastelloy C22 yog ib qho ntawm ob peb cov ntaub ntawv uas tuaj yeem tiv thaiv corrosion hauv qhov chaw muaj zog oxidizing xws li cov chlorine ntub dej, hypochlorite lossis chlorine dioxide. Alloy 20 tej zaum yuav corrode ntau heev nyob rau hauv ib puag ncig zoo sib xws, tshwj xeeb tshaj yog thaum kub kub.
Kub kub stability:Nyob rau hauv ib puag ncig huab cua ntawm 600 degree, Hastelloy C22 nthuav tawm oxidation zoo heev, nrog rau oxidation hnyav nce tus nqi tsawg dua lossis sib npaug li 0.5 mg / cm²·h2. Thaum raug kub hnyiab ntawm 540-870℃rau lub sijhawm ntev, tsis muaj σ theem lossis μ theem nag lossis daus tau pom rau C22, thiab qhov hnyav hauv lub xeev muaj hnub nyoog (kev cuam tshuam lub zog ntau dua lossis sib npaug rau 100 J) tseem zoo. Txawm li cas los xij, thaum Alloy 20 tau siv rau lub sijhawm ntev hauv qhov kub ntawm 450-850 degree, qhov toughness thiab corrosion kuj yuav txo qis vim nag lossis daus ntawm σ theem.
alloy n06022 thiab kws ntoo 20 phaj txias sib sau
Alloy 20 muaj qhov zoo tshaj plaws hauv cov txheej txheem txias txias vim nws cov ductility ntau dua (elongation 50%) thiab ua haujlwm qis dua. Nyob rau hauv sib piv, lub siab zog thiab siab ua hauj lwm hardening tus nqi ntawm Hastelloy C22 yuav tsum tau loj tonnage khoom thiab intermediate annealing kev kho mob thaum lub sij hawm txias txias.
20cb3 khoom thiab c22 alloy Kub sib sau
Hauv kev ua haujlwm kub, qhov kev pom zoo ua haujlwm kub ntawm C22 yog 950-1200 degree, uas yog nqaim dua li 900-1170℃ntau yam ntawm Alloy 20, thiab cov kev cai tswj tau nruj dua.
Alloy 20 thiab Hastelloy c22 Plate Chaw tsim tshuaj paus, tsum
HT PIPE yog ib tug thawj coj stockist thiab thoob ntiaj teb exporter nrog ntau tshaj 15 xyoo ntawm kev txawj ntse nyob rau hauv thoob ntiaj teb kev lag luam. Peb muab cov kav dej, Alloy 20 daim hlau thiabHastelloy C22 phaj, puag ncig tuav, thiab ntau yam ntawm cov yeeb nkab fittings, flanges, thiab li qub. Tiv tauj peb tam sim no rau cov lus qhia pub dawb thiab cov ntaub ntawv khoom ntiag tug.
