SA 387 Qib 5 Chav Kawm 1yog chromium-molybdenum alloy steel phaj raws li ASME Boiler thiab Pressure Vessel Code, npaj rau welded siab hlab ntsha thiab boiler qhov chaw ua haujlwm ntawm qhov kub thiab txias. Nws muaj qhov zoo siab -kub lub zog, nkag siab, toughness, thiab weldability. Chav Kawm 1 kev tsim qauv qhia txog cov khoom siv tshwj xeeb thiab kev kho cua sov, feem ntau normalizing thiab tempering, kom sib npaug zog thiab ductility. Nws yog dav siv nyob rau hauv refineries, petrochemical nroj tsuag, thiab hluav taws xob tsim tshuab qhov twg txhim khu kev qha kev ua tau zoo nyob rau hauv thermal stress yuav tsum tau.
Sib npaug
| BS | EN | ASME | DIN |
| ... | ... | SIB 387-5-1 | ... |
Specifications ASME SA387 Qib 5 Alloy Steel Phaj
| Lub npe | Nominal Chromium Cov ntsiab lus (%) |
Nominal Molybdenum Cov ntsiab lus (%) |
| SA387 Qib 5 | 5.00% | 0.50% |
Tensile Requirements rau ASME SA387 Qib 5 Alloy Steel Phaj Chav Kawm 1 Phaj
| Lub npe: | Yuav tsum tau: | Qib 5 |
|
SA387 Qib 5 |
Tensile zog, ksi [MPA] | 75 txog 100 [515 rau 690] |
| Yield zog, min, ksi [MPa] / (0.2% offset) | 45 [310] | |
| Elongation hauv 8 nti. [200mm], min % | ... | |
| Elongation hauv 2 nti. [50mm], min, % | 18 | |
| Txo thaj tsam, min% | 45 ( ntsuas ntawm cov qauv puag ncig) 40 ( ntsuas ntawm cov qauv tiaj tus) |
Cov Khoom Siv Tshuaj Rau ASME SA387 Qib 5 Alloy Steel Phaj
| Element | Chemical Composition (%) | |
| SA 387 Qib 5 | ||
| Cov pa roj carbon: | Kev Ntsuas Kub: | 0.15 max |
| Product Analysis: | 0.15 max | |
| Manganese: | Kev Ntsuas Kub: | 0.30 - 0.60 |
| Product Analysis: | 0.25 - 0.66 | |
| Phosphorus: | Kev Ntsuas Kub: | 0.035 |
| Product Analysis: | 0.035 | |
| Sulfur (max): | Kev Ntsuas Kub: | 0.030 |
| Product Analysis: | 0.030 | |
| Silicon: | Kev Ntsuas Kub: | 0.50 max |
| Product Analysis: | 0.55 max | |
| Chromium: | Kev Ntsuas Kub: | 4.00 - 6.00 |
| Product Analysis: | 3.90 - 6.10 | |
| Molybdenum: | Kev Ntsuas Kub: | 0.45 - 0.65 |
| Product Analysis: | 0.40 - 0.70 |
Cov yam ntxwv tseem ceeb:
Khoom siv:Chromium-Molybdenum (Cr-Mo) Alloy Steel.
Daim ntawv thov:Tsim los rau welded boilers thiab cov hlab ntsha siab ua haujlwm ntawm qhov kub siab.
Siab -Tsub Muaj Zog:Cov ntsiab lus molybdenum ho nce tensile lub zog ntawm qhov kub thiab txias.
Corrosion Resistance:Chromium muab kev txhim kho tiv thaiv oxidation thiab ntau yam corrosive media, suav nrog qee cov kua qaub thiab chloride kev ntxhov siab tawg.
Toughness:Muab zoo toughness thiab tsis kam rau thermal cycling embrittlement.
Weldability:Haum rau vuam, txawm tias tom qab -weld heat treatment (PWHT) feem ntau yuav tsum tau.
Kev kho cua sov:Feem ntau muab cov normalized thiab tempered kom ua tau raws li qhov xav tau cov khoom siv kho tshuab.
Cov ntawv thov tseem ceeb
Cov nkoj siab:Cov khoom siv yog ib qho kev xaiv rau kev tsim cov hlab ntsha siab uas tsim los kom ruaj ntseg los yog ua cov kua dej ntawm qhov kub thiab txias, qhov tsim nyog hauv cov roj, roj, thiab tshuaj lom neeg kev lag luam.
Boilers:Nws yog siv dav hauv cov chaw tsim hluav taws xob rau cov khoom siv hauv kev lag luam boilers thiab cov tshuab tsim hluav taws xob uas ua haujlwm tsis tu ncua nyob rau hauv siab thermal stress.
Kub Exchangers thiab Reactors:Hauv petrochemical ua cov nroj tsuag thiab refineries, cov phiaj no tsim cov cuab yeej tseem ceeb xws li cov khoom siv hluav taws xob sib hloov thiab cov hlab ntsha reactor, uas lawv pab txhawb kev hloov mus rau cov cua sov lossis tshuaj lom neeg yam tsis muaj kev cuam tshuam rau thermal degradation lossis corrosion.
Industrial Settings:Cov khoom siv kev ntseeg siab ua rau nws yog ib qho tseem ceeb hauv ntau yam kev lag luam hnyav, suav nrog cov chaw tsim tshuaj lom neeg thiab cov roj refineries, rau cov txheej txheem tseem ceeb thiab cov kav dej.
Vim li cas thiaj siv
High -Tsev Kev Pabcuam:Qhov ntxiv molybdenum concentration tseem ua rau cov khoom siv lub zog tensile thiab creep tsis kam ntawm qhov kub siab, tso cai rau nws kom muaj kev ncaj ncees ntawm cov qauv carbon steel yuav ua tsis tiav.
Corrosion Resistance:Cov ntsiab lus chromium tseem ceeb muab kev tiv thaiv zoo rau oxidation, scaling, thiab ntau yam corrosive agents (xws li, nyob rau hauv "kev pabcuam qaub" ib puag ncig), txuas ntxiv lub neej ntawm cov khoom siv thiab txo cov nqi kho.
Weldability:Txawm hais tias nws cov yam ntxwv ua tau zoo, SA 387 Qib 5 Chav Kawm 1 muaj qhov zoo weldability, tso cai rau cov fabricators los tsim complex thiab loj -scale Cheebtsam siv cov pa welding txoj kev yam tsis muaj kev cuam tshuam cov khoom ntawm lub hauv paus chiv keeb, tshwj xeeb tshaj yog ua ntej- thiab post-welding thaum tshav kub kub kev kho mob. Qhov no ua rau fabrication rau hauv cov cuab yeej kev cai yooj yim dua thiab ua tau zoo dua.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
Dab tsi yog qhov melting point ntau ntawm SA 387 GRADE 5 Chav Kawm 1?
Nws cov ntsiab lus melting yog li ntawm 1450-1500 degree, uas yog me ntsis qis dua cov pa roj carbon steel vim yog cov ntsiab lus alloy, tab sis nws tseem muaj qhov kub thiab txias stability hauv qab lub melting point.
Daim ntawv thov txwv ntawm SA 387 GRADE 5 Chav Kawm 1 yog dab tsi?
Nws yog qhov tsim nyog rau nruab nrab- qhov chaw siab, feem ntau nrog kev ua haujlwm siab txog li 10-30MPa, tshwj xeeb txwv nyob ntawm qhov kub thiab txias, kev tsim qauv thiab kev pabcuam.
Lub thermal conductivity ntawm SA 387 Qeb 5 Chav Kawm 1 yog dab tsi thiab nws cuam tshuam li cas rau daim ntawv thov?
Nws cov thermal conductivity yog li 40-45 W / (m·K) ntawm chav tsev kub, uas yog qis dua carbon steel, yuav tsum tau tsim tsim nyog nyob rau hauv cov khoom siv hluav taws xob sib pauv kom ntseeg tau tias kev hloov hluav taws xob.
Cov ncej dab tsi -weld cua sov txoj kev kho kom haum rau SA 387 GRADE 5 Chav Kawm 1?
Tsim nyog tshaj tawm -weld cua sov txoj kev kho mob muaj xws li tempering thiab kev ntxhov siab nyem annealing, uas tuaj yeem tshem tawm cov kev ntxhov siab seem, txhim kho kev sib koom ua ke thiab tiv thaiv kev ntxhov siab corrosion tawg.
Dab tsi yog qhov txawv ntawm SA 387 GRADE 5 Chav Kawm 1 thiab carbon steel nyob rau hauv cov nqe lus ntawm kev ua haujlwm siab - kub?
Piv nrog carbon steel, nws muaj qhov zoo dua siab - qhov kub thiab txias tsis kam, tsis yooj yim rau oxidize thiab soften ntawm qhov kub thiab txias, haum rau hnyav hnyav dua - qhov kub thiab txias.
Yuav ua li cas txhawm rau txheeb xyuas qhov zoo ntawm SA 387 GRADE 5 Chav Kawm 1 tom qab ua tiav?
Cov kev kuaj pom muaj xws li kuaj ultrasonic, kuaj cov khoom sib nqus, tshuaj lom neeg muaj pes tsawg leeg thiab kuaj cov cuab yeej cuab yeej kom ntseeg tau tias tsis muaj qhov tsis xws luag thiab ua tau raws li tus qauv yuav tsum tau ua.
Dab tsi yog cov pa roj carbon ntsiab lus ntawm SA 387 Qeb 5 Chav Kawm 1 thiab nws txoj haujlwm?
Cov ntsiab lus carbon yog li ntawm 0.15% mus rau 0.25%. Nws txhim kho lub zog thiab hardness ntawm cov hlau, tab sis cov pa roj carbon ntau dhau yuav txo nws qhov toughness thiab weldability.
Dab tsi yog qhov teeb meem tseem ceeb uas yuav tsum tau zam hauv cov txheej txheem tsim khoom ntawm SA 387 GRADE 5 Chav Kawm 1?
Lub ntsiab tsis xws luag yuav tsum tsis txhob muaj xws li kev sib cais, porosity, tawg thiab inclusions. Kev tswj nruj ntawm cov txheej txheem smelting thiab kev kho cua sov tuaj yeem txo qhov tsis xws luag.
Yuav khaws SA 387 GRADE 5 Chav Kawm 1 li cas los tiv thaiv corrosion?
Khaws rau hauv qhov chaw qhuav, zoo- qhov cua txias, tsis txhob sib cuag nrog cov dej noo thiab corrosive media, thiab npog nrog cov dej tsis zoo thiab tiv thaiv- cov ntaub ntawv corrosion los tiv thaiv nto xeb.
Txoj kev loj hlob ntawm SA 387 QIB 5 Chav Kawm 1 yog dab tsi hauv kev siv tshuab?
Nrog rau kev kho dua tshiab ntawm petrochemical thiab fais fab kev lag luam, nws tab tom txhim kho mus rau siab dua purity thiab ntau meej alloy piv kom tau raws li hnyav dua - kub thiab siab - cov kev xav tau siab.