SA387 Qib 22 Chav Kawm 2yog lub siab -lub zog, chromium-molybdenum alloy steel phaj, teev los ntawm ASTM A387 / ASME SA-387, feem ntau yog siv rau kev tsim hluav taws xob kub siab txog ntsha, boilers, thiab cua kub exchangers nyob rau hauv kev lag luam xws li roj, roj, thiab petrochemicals, muab piv rau cov neeg kho tshuab siab dua, zoo dua rau peb cov neeg kho tshuab. siab dua chromium thiab molybdenum cov ntsiab lus, muab normalized thiab tempered rau xav tau kev pab.
Specifications rau ASME SA387 Qib 22 Alloy Steel Phaj
| Lub npe | Nominal Chromium Cov ntsiab lus (%) |
Nominal Molybdenum Cov ntsiab lus (%) |
| SA387 Qib 22 | 2.25% | 1.00% |
Tensile Requirements rau ASME SA387 Qib 22 Alloy Steel Phaj Chav Kawm 2
| Lub npe: | Yuav tsum tau: | Qib 22 |
| SA387 Qib 22 | 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) |
Tshuaj muaj pes tsawg leeg ntawm SA387 GR.22 CL.2 Phaj
| C | Mn | P | S | Si | Cr | Mo |
| 0.04 - 0.15 | 0.25 - 0.66 | 0.035 | 0.035 | 0.5 max | 1.88 - 2.62 | 0.85 - 1.15 |
Kev tsim khoom
Melting
Cov hlau yog melted nyob rau hauv hluav taws xob arc rauv thiab ua kom zoo kom ua tiav cov tshuaj muaj pes tsawg leeg thiab kev huv.
Secondary Refining
Nqus degassing thiab ladle refining yog siv los txo impurities thiab txhim kho homogeneity.
Casting
Cov hlau molten yog cam khwb cia rau hauv slabs lossis ingots nyob rau hauv kev tswj xyuas kom tsis txhob muaj kev sib cais.
Cua sov thiab Kub Rolling
Slabs yog rhuab thiab kub dov mus rau qhov xav tau tuab, nrog ceev ceev tswj kom zoo microstructure.
Kev kho cua sov
Cov phaj yog normalized thiab tempered los txhim khu lub zog, toughness, thiab creep kuj.
Kev tshuaj xyuas thiab kuaj
Kev kuaj ultrasonic, kev kuaj tshuab, thiab tshuaj ntsuam xyuas tshuaj xyuas kom ua tau raws li ASTM cov qauv.
Kev ntsuam xyuas daim hlau ntawm SA 387 Qib 22 Chav Kawm 2
Ntau yam kev ntsuam xyuas yog qhov tseem ceeb tshaj qhov tseem ceeb los ntawm cov neeg tsim khoom txhawm rau kom paub tseeb tias cov phaj muab khoom tsis muaj qhov yuam kev. Kev ntsuam xyuas yog ua los ntawm cov kws tshaj lij los ntawm kev siv cov cuab yeej tshiab thiab niaj hnub no. Cov kev ntsuam xyuas ua tiav yog cov khoom siv txheeb xyuas qhov zoo, ntsuas qhov nyuaj, ntsuas kev sib xyaw ua ke, kev sib tw / flaring, macro / micro test, tshuaj ntsuam xyuas, pitting resistance test thiab mechanical test.
Cov ntawv thov tseem ceeb
Cov nkoj siab
Siv nyob rau hauv tshuaj, petrochemical, thiab refinery siab hlab ntsha ua hauj lwm nyob rau hauv siab kub.
Boilers thiab Kub Exchangers
Zoo tagnrho rau boiler nruas, headers, thiab tshav kub exchanger Cheebtsam uas yuav tsum tau siab - kub lub zog thiab oxidation kuj.
Lub zog tiam
Siv nyob rau hauv lub taub hau lub taub hau, turbine casings, thiab lwm yam siab -kub fais fab nroj tsuag Cheebtsam.
Kev lag luam roj thiab roj
Siv nyob rau hauv kev hloov kho, hydroprocessing reactors, thiab siab -kub piping systems.
Kev ua tshuaj lom neeg
Haum rau cov reactors thiab cov txheej txheem cov cuab yeej tuav siab -kub thiab corrosive media.
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.
Cov qauv dab tsi sib npaug rau SA 387 Gr. 22 Cl. 2?
Nws yog sib npaug rau ASTM A387 Qib 22 Chav Kawm 2. Hauv qee cov qauv thoob ntiaj teb, nws yog piv rau 2.25Cr-1Mo steel qib siv rau cov hlab ntsha siab.
Preheating qhov kub thiab txias tau pom zoo rau vuam SA 387 Gr. 22 Cl. 2?
Preheat kub feem ntau yog li ntawm 200-300 degree, nyob ntawm lub phaj thickness thiab txheej txheem vuam. Cov phaj tuab yuav xav tau ntau dua preheat kom txo cov hydrogen-induced cracking.
Lub zog creep ntawm SA 387 Gr . 22 Cl . 2 yog dab tsi?
Nws muaj kev nkag siab zoo ntawm qhov kub siab, feem ntau siv rau hauv daim ntawv thov txog li 593℃(1100℃F), ua rau nws haum rau siab -kub siab cov hlab ntsha.
Dab tsi yog qhov txawv ntawm SA 387 Gr. 22 Chav Kawm 1 thiab Chav Kawm 2?
Lub ntsiab sib txawv yog nyob rau hauv tej yam toughness yuav tsum tau. Chav Kawm 2 yuav tsum tau Charpy V- ntsuas qhov cuam tshuam ntawm qhov ntsuas kub qis (feem ntau yog 0℃F lossis -18 degree), kom ntseeg tau tias muaj zog dua rau kev thov ntau dua.
Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm SA 387 Gr. 22 Cl. 2?
Nws feem ntau muaj nyob ib ncig ntawm 2.00% chromium, 1.00% molybdenum, nrog rau kev tswj hwm ntawm carbon, manganese, silicon, phosphorus, thiab sulfur. Qhov muaj pes tsawg leeg yuav tsum ua raws li cov kev txwv hauv ASTM A387 / A387M.
SA 387 Gr. 22 Cl. 2 piv rau SA 387 Gr. 5 Cl. 2 li cas ntawm cov ntsiab lus alloy thiab kev ua haujlwm?
SA 387 Gr. 22 Cl. 2 muaj ntau dua chromium thiab molybdenum cov ntsiab lus (2.25Cr-1Mo) piv rau SA 387 Gr. 5 Cl. 2 (0.5Cr-0.5Mo). Cov ntsiab lus alloy siab dua no muab Gr . 22 superior kub-kub lub zog, nkag siab, thiab oxidation tsis kam, tso cai rau nws siv rau hauv cov kev pabcuam hnyav dua. Gr. 5 feem ntau yog siv rau hauv cov ntawv thov kub qis dua, thaum Gr. 22 yog dav siv hauv refineries, petrochemical nroj tsuag, thiab cov chaw tsim hluav taws xob rau cov khoom siv ua haujlwm kub txog 593℃.
Dab tsi yog qhov sib txawv ntawm SA 387 Gr. 22 Cl. 2 thiab SA 387 Gr. 22 Cl. 1?
Thaum lub tensile thiab yield zog yuav tsum tau rau Cl. 1 thiab Cl. 2 yog ze li ntawm zoo tib yam, Cl. 2 muaj ntau stringent cuam tshuam toughness yuav tsum tau. Qhov no txhais tau hais tias Cl. 2 daim hlau yuav tsum tau kuaj xyuas ntxiv kom ntseeg tau tias lawv tswj tau qhov hnyav ntawm qhov kub thiab txias, uas yog qhov tseem ceeb rau cov tuab- cov phab ntsa thiab cov ntawv thov uas muaj kev nyab xeeb yog qhov tseem ceeb. Kev txhim kho toughness ntawm Cl. 2 kuj muab kev tiv thaiv zoo dua rau kev qaug zog thiab thermal shock, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov khoom siv siab.
Dab tsi yog qhov txawv ntawm cov kev cai vuam ntawm SA 387 Gr. 22 Cl. 2 thiab SA 387 Gr. 11 Cl. 2?
Ob qib yuav tsum tau preheating thiab post-weld heat treatment (PWHT) los tiv thaiv hydrogen-induced cracking thiab xyuas kom zoo toughness. Txawm li cas los xij, SA 387 Gr. 22 Cl. 2 feem ntau yuav tsum muaj qhov kub thiab txias ntau dua (200-300 degree) thiab tswj PWHT ntau dua vim nws cov ntsiab lus chromium thiab molybdenum ntau dua, uas ua rau nws muaj zog dua. Welding consumables rau Gr. 22 kuj yuav tsum tau sib phim rau nws cov ntsiab lus alloy kom muaj zog thiab nkag mus rau hauv qhov chaw vuam. Gr. 11, nrog nws cov ntsiab lus qis qis, feem ntau yuav tsum tau qis dua preheat thiab tsis tshua muaj zog PWHT.