HT PIPE stocks tag nrho ntawm Alloy 20 thiab Alloy 31 kav, fittings, thiab flanges.Hu rau peb pab neeg technicalhnub no rau kev sib tw nqe lus.
Alloy 20 (UNS N08020) thiab Alloy 31 (UNS N08031)sawv cev rau tus qauv ntawm cov nqi kev ua tau zoo nyob rau hauv ib puag ncig corrosive ib puag ncig thiab lub ncov ntawm corrosion kuj nyob rau hauv cov xwm txheej hnyav heev. Txawm hais tias ob leeg koom nrog nickel-hlau-chromium raws li alloy system, lawv qhia qhov sib txawv tseem ceeb hauv corrosion kuj mechanism, mechanical zog thiab engineering applicability vim qhov sib txawv ntawm cov qauv tsim thiab alloying cov tswv yim.
Nickel alloy 20 thiab 31 Mechanical Properties Comparison
N08020 thiab N08031 yeeb nkab Lub zog thiab Toughness
Alloy 20: Kev daws-annealed tensile zog Ntau dua los yog sib npaug rau 550 MPa, yield zog Ntau dua los yog sib npaug rau 240 MPa, elongation Ntau dua los yog sib npaug rau 30%, hardness Tsawg dua los yog sib npaug rau 200 HB. Nws lub zog ua tau raws li qhov xav tau ntawm cov cuab yeej siv tshuaj lom neeg thaum tswj kev ua haujlwm zoo.
Alloy 31: Solution-annealed tensile strength ≥650 MPa, yield strength ≥276 MPa, and it retains ≥450 MPa yield strength at high temperatures (550°C). After aging treatment, the strength can reach 1000 MPa, with an impact energy retention rate >80% ntawm -196 degree.
20 alloy thiab 31 alloy Fabrication thiab Vuam
Alloy 20: Nrog Tsawg ua haujlwm hardening tus nqi, uas yog tsim rau cov pa ua haujlwm kub (1050-1150 degree) thiab ua haujlwm txias. Rau qhov vuam, ERNiCrMo-3 muab tub lim yog pom zoo uas yuav tsum tsis muaj kev kho cua sov tom qab vuam.
Alloy 31: Kub ua hauj lwm yuav tsum tau ua nyob rau ntawm 1200-1050 degree, thiab intermediate annealing yog xav tau rau kev ua hauj lwm txias (thaum deformation tshaj 15%). ERNiCrMo-13 muab tub lim hlau yuav tsum tau siv rau vuam kom ntseeg tau tias weld corrosion kuj. Txawm hais tias nyuaj rau fabricate, nws muaj kev ruaj ntseg vuam kev ua tau zoo.
Alloy 31 thiab alloy 20 Material Corrosion Resistance
Nickel 31 thiab nickel 20 General Corrosion Resistance
Alloy 20: Corrosion tus nqi<0.1 mm/year in ≤80% sulfuric acid, resistant to 50% sodium hydroxide solution, suitable for phosphoric acid, nitric acid, etc.
Alloy 31: Corrosion tus nqi<0.01 mm/year in 98% concentrated sulfuric acid + 200 ppm chlorides, only 0.003 mm/year in boiling phosphoric acid (85%), and resistant to fuming sulfuric acid and mixed acids (40% HF + 10% HNO₃). Its corrosion resistance comprehensively surpasses Alloy 20 in acidic, alkaline, and chloride environments.
kws ntoo 20 steel thiab kws ntoo 31 steelKev tiv thaiv hauv zos Corrosion
Alloy 20: Critical Pitting Temperature (CPT) ~ 60 degree, zoo dua kev ntxhov siab corrosion cracking (SCC) tsis kam tshaj 316L stainless hlau, tab sis tseem muaj kev pheej hmoo nyob rau hauv siab - kub chloride ib puag ncig.
Alloy 31: CPT mus txog 85 degree, Pitting Resistance Equivalent Number (PREN Ntau dua los yog sib npaug rau 50), nws tuaj yeem tshaj 20 xyoo hauv cov khoom siv dej hiav txwv thiab ntsev crystallization. Nws crevice corrosion kuj yog 40% siab dua li ib txwm 6-Mo steels. Nitrogen-strengthened austenitic qauv ho suppresses hauv zos corrosion.
UNS N08020 thiab UNS N08031 Tus Nqi thiab Tus Nqi -Kev Ua Tau Zoo
Alloy 20 thiab alloy 30 Khoom nqi
Alloy 20: Nws tus nqi yog li ~ 80–100 CNY / kg uas haum rau nruab nrab - corrosion, nqi- cov haujlwm rhiab heev.
Alloy 31: Nws tus nqi yog kwv yees li ~ 130 CNY / kg (sib tham rau kev yuav khoom ntau) uas yog qhov zoo tagnrho rau cov khoom siv tseem ceeb uas yuav tsum muaj kev ntseeg siab thiab ua haujlwm ntev.
N08020 thiab N08031 Lub Neej Cycle Economy
Nyob rau hauv siab - qhov kub thiab txias chloride ib puag ncig, txawm hais tias Alloy 31 muaj cov nqi pib dua, nws tus nqi qis corrosion thiab txo cov kev xav tau kev saib xyuas tuaj yeem ua rau tag nrho cov nqi qis dua Alloy 20 nyob rau hauv 5 xyoo. Piv txwv li, hloov Hastelloy C-276 nrog Alloy 31 hauv FGD systems tuaj yeem txo cov nqi khoom los ntawm 35%.
Kev sib piv ntawm Alloy 20 thiab Alloy 31 yeeb nkab
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Kev ntsuam xyuas Dimension |
Alloy 20 yog Superior |
Alloy 31 yog Superior |
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Nruab nrab Corrosivity |
Sulfuric acid (tsawg dua lossis sib npaug li 80%), phosphoric acid, tsis muaj zog alkaline daws |
Concentrated sulfuric acid (>80%), chlorides (>200 ppm), sib xyaw acids (HF / HNO₃) |
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Qhov kub thiab txias |
-20℃rau 400 degree |
-196℃rau 550 degree |
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Mechanical Loads |
Nruab nrab- cov khoom siv tsis tshua muaj siab zoo li qub |
Siab -siab, vibrating, lossis cryogenic Cheebtsam |
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Tus nqi txwv |
Kev siv nyiaj tsawg, tso cai rau kev saib xyuas tsis tu ncua |
Cov cuab yeej tseem ceeb uas yuav tsum tau ua kom ntev - tu lub sijhawm - ua haujlwm dawb |
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Kev lag luam Standards |
Khoom noj khoom haus & tshuaj (FDA), tshuaj lom neeg (ASTM B463) |
Roj & roj (NACE MR0175), nuclear zog (ASME SB622), sib sib zog nqus- hiav txwv mining (ISO 15156) |
Alloy 20 & Alloy 31 Khoom Chaw tsim khoom
Nrog 15 xyoo ntawm kev xa tawm zoo tshaj plaws, HT PIPE yog koj cov khoom lag luam txhim khu kev qha thiab xa tawm. Peb cov ntaub ntawv muaj xws liAlloy 20 cev, Alloy 31 daim hlau, puag ncig tuav, thiab ntau yam fittings, flanges, thiab vuam accessories.Tiv tauj peb hnub norau tsis muaj -cov nqi them nqi thiab cov ntsiab lus ntawm cov khoom lag luam- peb npaj txhij los txhawb koj cov haujlwm.
