SA 387 Qib 5 Chav Kawm 2yog chromium-molybdenum alloy steel phaj teev nyob rau hauv ASME Boiler thiab Pressure Vessel Code. Nws yog feem ntau yog siv rau welded siab hlab ntsha thiab boiler Cheebtsam ua hauj lwm nyob rau hauv siab kub. Cov khoom siv no muaj lub zog zoo, nkag siab tsis kam, thiab oxidation tsis kam, ua rau nws tsim nyog rau refineries, petrochemical nroj tsuag, thiab kev siv hluav taws xob tsim hluav taws xob. Nws cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab tau nruj tswj xyuas kom ntseeg tau tias muaj kev ntseeg siab nyob rau hauv siab - kub thiab siab - siab.
Sib npaug
| BS | EN | ASME | DIN |
| ... | ... | SA387-5-2 | ... |
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 2 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 |
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1. Kev tsim khoom tseem ceeb
Kub-Rolling: Cov phaj feem ntau yog tsim los ntawm kub- dov (HR), qhov twg steel slabs yog cua sov thiab dhau los ntawm cov chais kom ua tiav cov thicknesses feem ntau ntawm 5mm txog 150mm.
Txias-Rolling: Qee cov ntawv yog txias-rolled (CR) kom ua tau zoo dua qhov ntev ntev thiab ua kom lub ntsej muag du dua rau cov ntawv thov kev lag luam tshwj xeeb.
2. Kev kho cua sov tseem ceeb
Txhawm rau kom ncav cuag qib 2 lub zog- uas siab dua li Chav Kawm 1-cov khoom yuav tsum tau ua cov txheej txheem thermal:
Normalizing & Tempering (N + T): Lub phaj yog rhuab saum nws qhov tseem ceeb kub thiab txias hauv huab cua tseem ua kom zoo dua cov qauv nplej.
Quenching & Tempering (Q + T): Thaum tau teev tseg, kua quenching (ua kom txias txias) yog siv ua ntej tempering los ua kom muaj zog thiab tensile zog.
Yam tsawg kawg nkaus Tempering kub: Qib 5 yuav tsum muaj qhov ntsuas kub tsawg kawg ntawm 1300℃F (705 degree) kom ntseeg tau cov qauv kev ruaj ntseg ntawm kev ua haujlwm siab.
3. Cov txheej txheem Fabrication
Precision Cutting: Cov neeg muab khoom siv lub computer- tswj cov ntshav plasma, laser, lossis waterjet txoj kev kom tau raws li cov neeg siv khoom qhov ntev.
Kev sib sau: Txawm tias nws lub zog siab, cov alloy muaj qhov zoo formability, cia nws khoov los yog zoo li tus rau hauv cov hlab ntsha thiab lub taub hau.
Vuam: Nws yog tsim los rau siab weldability siv TIG, MIG, thiab SMAW txoj kev. Preheating thiab post-weld heat treatment (PWHT) yog tus qauv los tiv thaiv kev tawg thiab txo kev ntxhov siab sab hauv.
4. Kev kuaj tshwj xeeb
Cov txheej txheem txheej txheem tau soj ntsuam nruj kom paub tseeb tias kev ncaj ncees:
Tsis yog-Kev kuaj puas tsuaj (NDT): Kev kuaj ultrasonic (UT) rau qhov tsis zoo sab hauv thiab kuaj Magnetic Particle (MPI) rau qhov tawg ntawm qhov chaw.
Mechanical Verification: suav nrog siab - ntsuas qhov kub thiab txias thiab Charpy V-Kev ntsuas qhov cuam tshuam, feem ntau ua rau qhov kub thiab txias li -52℃.
Qhov Zoo Tshaj Plaws
High Tensile zog:Chav Kawm 2 muaj cov khoom siv kho tshuab zoo dua piv rau Chav Kawm 1, nrog rau ntau yam tensile ntawm515-690 MPathiab qhov tsawg kawg nkaus tawm lub zog ntawm310 MPa, xyuas kom muaj kev ruaj ntseg nyob rau hauv kev kub siab.
Thermal Stability & Creep Resistance:Qhov sib ntxiv ntawm molybdenum tso cai rau cov hlau kom tswj tau nws lub zog ntawm qhov kub thiab txias mus txog thiab tshaj1300 ° F (705 ° F), tiv thaiv deformation (creep) dhau lub neej ua haujlwm ntev.
Txhim kho Corrosion thiab Oxidation Resistance:Cov qib chromium siab tiv thaiv cov khoom tiv thaiv oxidation aggressive thiab ntau hom corrosion, nrog rau pitting thiab kev ntxhov siab -corrosion cracking.
Weldability zoo heev:Txawm hais tias nws cov ntsiab lus siab alloy, nws tuaj yeem welded siv cov qauv txheej txheem (TIG, MIG, SMAW), muab preheating kom raug thiab tom qab-weld heat treatment (PWHT) yog siv.
Tus nqi -Kev ua tau zoo:Nws cov kav ntev thiab ua haujlwm rau qhov chaw hnyav txo qhov zaus ntawm kev saib xyuas thiab hloov pauv, muab cov nqi qis dua - lub sijhawm ua haujlwm.
Cov ntawv thov tseem ceeb
Roj & Roj Kev Lag Luam:Siv nyob rau hauv refineries rau hydrocracking units, catalytic reformers, thiab pipelines, tshwj xeeb tshaj yog nyob rau hauv"Siab Service"(siab H2S) ib puag ncig.
Petrochemical Kev Ua Haujlwm:Qhov tseem ceeb rau kev tsim kho lub siab - cov hlab ntsha siab, cov khoom siv hluav taws xob sib hloov, thiab lub tank cia rau cov tshuaj tsis haum.
Kev tsim hluav taws xob:Dav siv rau boiler nruas, chav generators, thiab tshwj xeeb piping nyob rau hauv ob fossil roj thiab nuclear fais fab nroj tsuag.
Tshuaj & Fertilizer Production:Siv rau reactors xws li ammonia thiab urea synthesis yees uas ua haujlwm nyob rau hauv huab cua kub thiab corrosive tej yam kev mob.
Heavy Machinery & Industrial Equipment:Pom nyob rau hauv siab -kub ducting, flanges, thiab structural Cheebtsam rau kev tsim thiab tiv thaiv daim ntaub ntawv.
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.
SA 387 Qib 5 Chav Kawm 2 yog dab tsi?
SA 387 Qib 5 Chav Kawm 2 yog chromium-molybdenum alloy steel phaj teev nyob rau hauv ASME Boiler thiab Pressure Vessel Code. Nws yog feem ntau yog siv rau welded siab hlab ntsha thiab boiler Cheebtsam ua hauj lwm nyob rau hauv siab kub. Cov khoom siv no muaj lub zog zoo, nkag siab tsis kam, thiab oxidation tsis kam, ua rau nws tsim nyog rau refineries, petrochemical nroj tsuag, thiab kev siv hluav taws xob tsim hluav taws xob. Nws cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab tau nruj nruj kom ntseeg tau tias muaj kev ntseeg siab nyob rau hauv siab - kub thiab siab - siab.
Cov qauv dab tsi suav nrog SA 387 Qib 5 Chav Kawm 2?
SA 387 Qib 5 Chav Kawm 2 yog them los ntawm ASME SA-387, uas yog ib feem ntawm ASME Boiler thiab Pressure Vessel Code, Tshooj II, Ntu A. Cov qauv no txhais cov cai rau chromium-molybdenum steel daim hlau siv hauv cov hlab ntsha siab. Nws qhia txog cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, kev kho cua sov, thiab cov txheej txheem kuaj. Kev ua raws li SA-387 xyuas kom meej tias cov khoom ua tau raws li qhov tsim nyog kev nyab xeeb thiab kev ua haujlwm zoo rau cov kev pabcuam kub kub hauv cov ntawv thov tseem ceeb.
SA 387 Qib 5 Chav Kawm 2 txawv li cas ntawm Qib 5 Chav Kawm 1?
SA 387 Qib 5 Chav Kawm 1 thiab Chav Kawm 2 muaj cov tshuaj lom neeg zoo sib xws tab sis txawv ntawm cov cuab yeej cuab tam. Chav Kawm 2 muaj ntau dua cov lus qhia tsawg kawg nkaus thiab lub zog tensile piv rau Chav Kawm 1. Chav Kawm 2 kuj tau txais kev kho cua sov ntau dua thiab kev sim kom ua tiav lub zog zoo dua thiab tawv. Raws li qhov tshwm sim, Chav Kawm 2 yog qhov nyiam rau cov ntawv thov ntau dua qhov xav tau lub zog siab dua ntawm qhov kub siab.
Cov txheej txheem vuam dab tsi feem ntau siv rau SA 387 Qib 5 Chav Kawm 2?
Cov txheej txheem vuam ntau rau SA 387 Qib 5 Chav Kawm 2 suav nrog SMAW, GTAW, GMAW, thiab SAW. Qhov kev xaiv nyob ntawm kev sib koom tsim, thickness, thiab ntau lawm xav tau. Tsawg-hydrogen electrodes thiab fluxes yog qhov zoo dua los txo qhov kev pheej hmoo tawg. Kev tsim nyog tus txheej txheem tsim nyog thiab welder ntawv pov thawj yog qhov tseem ceeb los xyuas kom meej welds txhim khu kev qha. Txhua tus txheej txheem muaj qhov zoo tshwj xeeb, xws li GTAW rau cov hauv paus hla thiab SAW rau siab - tso nyiaj tso rau hauv cov phaj tuab.
Dab tsi yog cov qauv thiab qhov ntev ntawm SA 387 Qib 5 Chav Kawm 2?
SA 387 Qib 5 Chav Kawm 2 feem ntau yog tsim los ua cov hlau phaj hauv ntau qhov tuab thiab dav, raws li tau teev tseg los ntawm ASME SA-387. Cov phaj tuaj yeem muaj los ntawm cov ntawv nyias mus rau ob peb nti tuab, nyob ntawm daim ntawv thov. Cov khoom kuj tseem muaj nyob rau hauv forgings lossis castings rau cov khoom tshwj xeeb. Dimensions thiab kam rau ua yog tswj kom ua tau raws li lub siab lub nkoj fabrication thiab tsim code raws cai.
SA 387 Qib 5 Chav Kawm 2 piv rau carbon steel daim hlau li SA 516 li cas?
Piv nrog rau cov pa roj carbon steel daim hlau xws li SA 516, SA 387 Qib 5 Chav Kawm 2 muaj zog dua thiab zoo dua nkag los ntawm qhov kub siab vim nws cov chromium-molybdenum alloying. SA 516 yog qhov tsim nyog rau kev siv qis dua -kub siab ntawm lub nkoj, thaum SA 387 Qib 5 Chav Kawm 2 yog qhov nyiam rau siab - qhov kub thiab txias kev pabcuam hauv cov chaw tsim khoom thiab cov chaw tsim hluav taws xob. Cov hlau alloy tseem xav tau kev siv vuam nruj dua thiab cov txheej txheem kho cua sov.
Dab tsi yog cov khoom sib npaug ntawm SA 387 Qib 5 Chav Kawm 2 hauv lwm cov qauv?
SA 387 Qib 5 Chav Kawm 2 yog sib npaug rau ASTM A387 Qib 5 Chav Kawm 2. Nyob rau hauv cov qauv European, nws yuav raug muab piv rau qee yam Cr-Mo steel qib, txawm hais tias qhov sib npaug yog nyob ntawm cov khoom siv tshuaj lom neeg thiab cov khoom siv. Thaum xaiv cov khoom sib npaug, nws yog ib qho tseem ceeb kom paub tseeb tias kev ua raws li cov qauv tsim thiab cov kev xav tau los xyuas kom muaj kev sib haum xeeb hauv lub zog, toughness, thiab weldability.
Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm SA 387 Qib 5 Chav Kawm 2?
SA 387 Qib 5 Chav Kawm 2 feem ntau muaj chromium thiab molybdenum ua cov ntsiab lus tseem ceeb, nrog rau carbon, manganese, silicon, sulfur, thiab phosphorus. Chromium muab oxidation thiab corrosion kuj, thaum molybdenum txhim khu kev siab - kub lub zog thiab creep kuj. Cov pa roj carbon monoxide yog tswj los tswj cov weldability thiab toughness. Cov ntsiab lus tsuas yog txwv los tiv thaiv embrittlement thiab xyuas kom meej cov khoom sib xws ntawm cov khoom sib txawv.
Dab tsi yog cov khoom tseem ceeb ntawm SA 387 Qib 5 Chav Kawm 2?
SA 387 Qib 5 Chav Kawm 2 feem ntau tau teev cov txiaj ntsig tsawg kawg nkaus thiab lub zog tensile, nrog rau qhov zoo elongation thiab txo qhov chaw. Nws kuj muaj qhov tsim nyog cuam tshuam rau lub zog, tshwj xeeb tshaj yog tom qab kev kho cua sov kom raug. Cov khoom no ua rau nws tsim nyog rau cov hlab ntsha siab thiab cov boiler Cheebtsam raug rau qhov kub thiab txias thiab nruab nrab mus rau siab. Cov ntaub ntawv tuav nws lub zog thiab ductility nyob rau hauv ntev -lub sij hawm thermal raug, kom ntseeg tau kev ua tau zoo.