ASTM A387 Qib 11 Chav Kawm 2 yog dab tsi?
ASTM A387 Qib 11 Chav Kawm 2yog chromium -molybdenum alloy steel tsim rausiab kub, feem ntau siv nyob rau hauv siab -temp siab hlab ntsha, nrog rau cov kev pab cuam feem ntau los ntawmib ncig350℃rau 480℃(660℃F txog 900℃F), txawm hais tias nws tuaj yeem siv tau ntawm qhov kub siab dua (txog 649℃lossis 1200℃F) hauv cov ntawv thov ASME tshwj xeeb, nrog nws cov khoom (xws li lub zog siab dua li Chav 1) ua tiav los ntawm kev kho cua sov ntawm li 620℃(1150℃F).
ASTM A387 Qib 11 Chav Kawm 2 yog qhov qis- alloy steel specification tsim los rau cov phaj siab siv nyob rau hauv siab - qhov kub thiab txias. Characterized los ntawm nws nominal muaj pes tsawg leeg ntawm1.25% Chromium thiab 0.5% Molybdenum, no alloy yog tsim tshwj xeeb los muab qhov sib npaug ntawm cov khoom siv dag zog thiab tshuaj lom neeg ruaj khov. Cov ntsiab lus molybdenum ua rau cov hlau "ceep" tsis kam - muaj peev xwm tiv taus qeeb deformation nyob rau hauv qhov kev ntxhov siab tas li thaum kub kub- thaum chromium muab txheej tiv thaiv oxidation thiab corrosion. Qhov no ua rau nws yog ib qho tseem ceeb ntawm cov khoom siv rau kev tsim cov boilers muaj boilers thiab tshav kub exchangers uas ua hauj lwm nyob rau hauv cov kev xav tau ntawm cov roj refineries thiab tshuaj ua cov nroj tsuag.
Qhov txawv ntawm Chav Kawm 1 los ntawm nws cov khoom siv zoo tshaj plaws, Chav Kawm 2 xaiv yuav tsum muaj txheej txheem kev kho cua sov ntau dua, feem ntau suav nrognormalizing thiab tempering. Cov txheej txheem metallurgical no ua rau cov khoom thauj khoom nce ntxiv -cov kabmob muaj peev xwm, ua rau lub zog tensile ntawm515 txog 690 MPa (75 ~ 100 ksi)thiab qhov tsawg kawg nkaus yield zog ntawm310 MPa (45 ksi). Thaum nws muaj lub zog ntau dua li nws cov chav kawm 1, nws khaws cov weldability zoo thiab durability uas yuav tsum tau muaj rau kev tsim cov hlab ntsha. Cov cwj pwm no ua kom ntseeg tau tias cov hlau tuaj yeem tiv taus qhov hnyav sab hauv thiab thermal cycling uas niaj hnub petrochemical thiab hluav taws xob tsim infrastructure.
Cov yam ntxwv tseem ceeb
Kev sib xyaw:~ 1.25% Chromium, ~ 0.5% Molybdenum.
Kev kho cua sov:Normalized thiab Tempered (tsawg tempering kub ~ 620 degree).
Khoom (Class 2):Lub zog siab dua li Chav Kawm 1 vim kev kho mob.
Tensile zog: 75-100 ksi (515-690 MPa).
Yield zog: Min 43 ksi (310 MPa).
Impact Tested: Feem ntau mus rau -52 degree.
Chav Kawm 1 vs. Chav Kawm 2
Chav Kawm 1:Tsawg zog xav tau.
Chav Kawm 2:Siab
Daim ntawv thov:Welded boilers, siab hlab ntsha, tshav kub exchangers nyob rau hauv siab kub kev pab cuam.
Kev lag luam:Petrochemical, Roj & Roj, Kev Tsim Hluav Taws Xob.
Puas yog ASTM A387 Qib 11 Chav Kawm 2 carbon steel? ?
Tsis yog, ASTM A387 Qib 11 Chav Kawm 2 tsis yog carbon hlau; nws yog achromium-molybdenum (Cr-Mo) alloy hlau, tshwj xeeb tsim los rau siab -kub siab cov hlab ntsha, nrog ntxiv chromium (ib ncig ntawm 1-1.5%) thiab molybdenum (ib puag ncig 0.5%) rau kev txhim kho lub zog, corrosion resistance, thiab creep resistance, distinguishing nws los ntawm yooj yim carbon steels. Qhov kev xaiv "Class 2" qhia tau hais tias muaj zog dua qhov yuav tsum tau ua tiav los ntawm kev kho cua sov tshwj xeeb (normalized thiab tempered) piv rau Chav Kawm 1,
Dab tsi welding pas nrig rau ASTM A387 Qib 11 Chav Kawm 2?
Rau ASTM A387 Qib 11 Chav Kawm 2 (a 1.25Cr-0.5Mo alloy), siv tsawg-carbon chromium-molybdenum electrodes xws liE7018-B2L(SMAW/Stick),E8018-B2los yogE8018-B3(rau P11 txog P22),ER80S -B2los yogER90S-B3(TIG/MIG), lossis flux tsim nyog-cored xaiv xws liE9XT1-B3C, kom ntseeg tau qhov sib txuam chemistry, preheat kom zoo (nyob ib ncig ntawm 150-200 degree), thiab tom qab-weld heat treatment (PWHT) rau kev ua haujlwm zoo hauv cov hlab ntsha siab.
Puas yog ASTM A387 Qib 11 Chav Kawm 2 kev kub ceev hlau?
Tsis yog, ASTM A387 Qib 11 Chav Kawm 2 yogtsis yogsiab- steel ceev (HSS); nws yog achromium-molybdenum (Cr-Mo) alloy siab hlab ntsha hlautsim los rau siab -kub lub zog, creep resistance, thiab corrosion kuj, feem ntau yog siv nyob rau hauv boilers thiab petrochemical khoom, whereas siab - ceev steels yog cov cuab yeej steels nrog siab tungsten / molybdenum cov ntsiab lus rau cov cuab yeej txiav. Qib 11 Chav Kawm 2 muaj cov cuab yeej kho kom zoo dua qub xws li lub zog tawm los ntau dua li Chav Kawm 1 vim yog kev kho cua sov ntxiv (normalized thiab tempered) rau qhov xav tau kev pabcuam kub siab.
Sib npaug
| BS | EN | ASTM/ASME | DIN |
| 621 B | ––– | A387-11-2 | ––– |
Chemical Requirements:
| . | . |
|---|---|
| Cov pa roj carbon (C) | % |
| Kev Ntsuas Kub: Product Analysis: |
0.05 - 0.17 0.04 - 0.17 |
| Manganese (Mn) | % |
| Kev Ntsuas Kub: Product Analysis: |
0.40 - 0.65 0.35 - 0.73 |
| Phosphorus (P) | % |
| Kev Ntsuas Kub: Product Analysis: |
0.035 0.035 |
| Sulfur (S) (Max) | % |
| Kev Ntsuas Kub: Product Analysis: |
0.035 0.035 |
| Silicon (Si) | % |
| Kev Ntsuas Kub: Product Analysis: |
0.50 - 0.80 0.44 - 0.86 |
| Chromium (Cr) | % |
| Kev Ntsuas Kub: Product Analysis: |
1.00 - 1.50 0.94 - 1.56 |
| Molybdenum (hli) | % |
| Kev Ntsuas Kub: Product Analysis: |
0.45 - 0.65 0.45 - 0.70 |
ASTM A387 GR 11 CLASS 2 Phaj Specification
| Khoom | Specification |
|---|---|
| Qib | ASTM A387 Gr 11 CL.2 Alloy Steel Phaj |
| Txuj | ASTM A 387 / ASME SA387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASME SA387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASME SA387 / ASTM A387 / ASME SA387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASME SA387) Cov ntawv pov thawj |
| Dav | 1000mm - 4500 hli |
| Thickness | 5mm - 150 hli |
| Ntev | 3000mm - 18000 hli |
| Impact Tested | -52 ° C |
| Txheej txheem | Kub-Rolled (HR) |
Tensile Requirements rau ASTM A387 Qib 11 Alloy Steel Phaj Chav Kawm 1 Phaj
| Lub npe: | Yuav tsum tau: | Qib 11 |
| A387 Qib 11 | Tensile zog, ksi [MPa] | 75 txog 100 [515 rau 690] |
| Yield zog, min, ksi [MPa] / (0.2% offset) | 43 [310] | |
| Elongation hauv 8 nti. [200mm], min % | 18 | |
| Elongation hauv 2 nti. [50mm], min, % | 22 | |
| Txo thaj tsam, min% | ––– |
| Lub npe | Nominal Chromium Cov ntsiab lus (%) | Nominal Molybdenum Cov ntsiab lus (%) |
|---|---|---|
| A387 Qib 11 | 1.25% | 0.50% |
1Dab tsi yog daim ntawv thov kev lag luam ntawm ASTM A387 Qib 11 Chav Kawm 2?
ASTM A387 Qib 11 Chav Kawm 2 steel feem ntau yog siv rauKev pabcuam kub siabnyob rau hauv cov hlab ntsha siab, boilers, thiab tshav kub exchangers, tshwj xeeb tshaj yog nyob rau hauv lubroj, roj, petrochemical, thiab fais fab kev lag luamvim nws lub zog zoo heev, weldability, thiab tiv thaiv corrosion thiab oxidation ntawm qhov kub thiab txias. Cov ntawv thov tseem ceeb suav nrog hydrogenation reactors, hydrocracking units, steam headers, thiab cia tso tsheb hlau luam hauv qhov xav tau ib puag ncig.
2 Dab tsi yuav tsum tau ceev faj thaum vuam ASTM A387 Qib 11 Chav Kawm 2?
Thaum vuam ASTM A387 Qib 11 Chav Kawm 2 (a 1.25Cr-0.5Mo alloy), kev ceev faj tseem ceeb suav nrogKev tu kom huv, yuav tsum tau ua kom sov ua ntej (nyob ib ncig ntawm 149℃/ 300℃F), siv qis -hydrogen electrodes (zoo li E8018-B2), tswj qhov kub thiab txias, thiab siv Kev Kho Mob Tom Qab Kub Kub (PWHT) (ib ncig 690℃/ 1275℃F)tiv thaiv kev tawgvim nws nyiam tsim cov martensite nkig, yuav tsum tau ua raws li ASME / AWS cov lej rau cov kev txwv tshwj xeeb.
3 Dab tsi yog qhov txawv ntawm ASTM A387 Qib 11 Chav Kawm 2 thiab ASTM A387 Qib 11 Chav Kawm 1?
ASTM A387 Qib 11 Chav Kawm 2 yog qhov muaj zog, tawv dua ntawm Qib 11 Chav Kawm 1, feem ntau txawv ntawm cov khoom siv kho tshuab (siab dua tensile/yield zog) vim muaj peev xwm sib txawv ntawm kev kho cua sov, ua rau Chav Kawm 2 haum rau kev xav tau siab dua - kub / siab daim ntawv thov dua li Chav Kawm 1, thaum ob qho tib si sib npaug rau 25% Cr.-1.
4 Dab tsi yog qhov nyuaj ntawm ASTM A387 Qib 11 Chav Kawm 2?
ASTM A387 Qib 11 Chav Kawm 2 steel qhov nyuaj tsis yog ib tus lej tas li tab sis nws txawv nrog tempering, tab sis nws feem ntau muajBrinell hardness ntawm ib ncig ntawm 170-207 HBW(los yog kwv yees li 190 HBW raws li ib qho piv txwv), qhia txog nws lub zog siab dua Chav Kawm 2, nrog rau qhov tsawg kawg nkaus tensile lub zog feem ntau nyob ib ncig ntawm 515-690 MPa (75-100 ksi) tom qab kev kho cua sov rau cov hlab ntsha siab.
5 Dab tsi yog ASTM A387 Qib 11 Chav Kawm 2 sib npaug?
ASTM A387 Qib 11 Chav Kawm 2 yog sib npaug rauASME SA387 Qib 11 Chav Kawm 2(lub ASME boiler thiab siab hlab ntsha code version) thiab muaj thoob ntiaj teb counterparts nyiamEN 10028 13CrMoSi5-5thiab British StandardSIB 621B, tag nrho cov khoom zoo sib xws 1.25% Chromium, 0.50% Molybdenum alloy steel nrog cov khoom tshwj xeeb siab tensile zog rau siab - kub siab siv.
ASTM A387 Qib 11 Chav Kawm 2 yog dab tsi?
ASTM A387 Qib 11 Chav Kawm 2 yog chromium-molybdenum (Cr-Mo) alloy steel phaj rau siab-kub siab cov hlab ntsha, muab lub zog siab dua li Chav Kawm 1 vim kev kho cua sov, nrog ib puag ncig 1.25% chromium thiab 0.5% molybdenum}} siv zog, siab heev thiab 2 molybdenum creeping, zoo heev thiab muaj zog. roj, roj, thiab tshuaj lom neeg kev lag luam. Nws yog lub npe hu rau cov ntawv thov xws li reactors thiab cov khoom siv hluav taws xob sib txawv uas xav tau qhov kub thiab txias.
7 Tus lej P ntawm ASTM A387 Qib 11 Chav Kawm 2 yog dab tsi?
P- Tus lej rau ASTM A387 Qib 11 Chav Kawm 2 alloy hlau, siv hauv cov hlab ntsha siab, yogP-Number 4, uas xaiv cov hlau tsis tshua muaj hlau (Cr-Mo) uas poob rau hauv cov kev sib xyaw tshwj xeeb rau kev faib pawg vuam. Cov khoom no yog tus cwj pwm los ntawm nws cov 1.25% Chromium thiab 0.5% Molybdenum cov ntsiab lus, txawv ntawm lwm qib los ntawm nws cov khoom siv tshuab (Class 2 muaj zog dua li Chav Kawm 1) tab sis sib koom tib lub hauv paus chemistry,
Yog tias koj muaj qhov project xav tau rauASTM A387 Qib 11 Chav Kawm 2, peb txais tos koj nug. GNEE tuav cov khoom lag luam loj uas feem ntau siv cov qib siab zog steel rau koj xaiv.Rau cov ncauj lus kom ntxaws txhua yam khoom, tshuaj lom neeg muaj pes tsawg leeg, thiab cov ntaub ntawv kev, nrog rau cov qauv dawb, thov hu rau peb lub Hoobkas tam sim ntawd. Peb muab cov nqi sib tw, ruaj khov zoo, thiab kev pabcuam tshaj lij. Email: info@gneesteels.com
