ASTM A387 Qib 5 Chav Kawm 2 Alloy Steel Phaj
Cov ntsiab lus tseem ceeb ntawm cov hlau alloy no suav nrog molybdenum, muab lub zog tensile zoo kawg li thiab ua rau muaj kev tiv thaiv corrosion. Cov phaj no ua raws li cov lus qhia ntawm ASTM A387, ib qho kev lag luam - tus qauv specification tswj kev tsim cov welded molybdenum steel daim hlau. Lawv qhov tseem ceeb yog qhov tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov xav tau kev ua tau zoo hauv qhov kub thiab txias.
ASTM A387 Qib 5 Chav Kawm 2yog lub siab -kev ua tau zoo chromium-molybdenum alloy steel phaj tshwj xeeb tsim los siv rau hauv cov hlab ntsha uas muaj zog thiab cov boilers muaj kev ua haujlwm ntawm qhov kub siab. Cov qib no muaj cov ntsiab lus siab chromium ntawm4.00% rau 6.00%thiab molybdenum cov ntsiab lus ntawm0.45% rau 0.65%, muab cov khoom siv tshwj xeeb rau oxidation, hydrogen nres, thiab corrosion. Nws yog ib qho tseem ceeb ntawm cov khoom siv roj, roj, thiab petrochemical, tshwj xeeb tshaj yog rau "kev pabcuam qaub" ib puag ncig uas cov hlau yuav tsum tiv taus cov tshuaj degradation nyob rau hauv cov cua kub hnyav.
Raws li ib tugChav kawm 2cov khoom siv, qib no yog cua sov-kho (feem ntau dhau los ntawm normalizing thiab tempering) kom ua tiav cov tshuab muaj zog dua piv rau Chav Kawm 1. Nws muaj lub zog tensile muaj zog ntau ntawm515 rau 690 MPa(75 mus rau 100 ksi) thiab qhov tsawg kawg nkaus yield zog ntawm310 MPa(45 hli). Qhov kev sib xyaw ua ke ntawm lub zog tensile siab thiab thermal stability ua rau nws muaj ntau yam kev daws teeb meem rau fabricating loj - ntsuas kub exchangers thiab reactors uas yuav tsum tau ntev - lub sij hawm durability thiab structural integrity nyob rau hauv hnyav heev - kub daim ntawv thov.
Cov yam ntxwv tseem ceeb:
Kev sib xyaw:Muaj li ntawm 4-6% Chromium (Cr) thiab 0.45-0.65% Molybdenum (Mo).
Khoom:Muab lub zog tensile zoo, tawm lub zog, hardness, thiab toughness ntawm qhov kub thiab txias, nrog rau kev tiv thaiv oxidation thiab corrosion.
Daim ntawv thov:Dav siv nyob rau hauv cov tshuaj, petrochemical, roj & roj, thiab chiv industries rau cov khoom xws li boilers, tshav kub exchangers, thiab siab hlab ntsha.
Kev kho cua sov:Feem ntau muab nyob rau hauv lub normalized thiab tempered mob.
Cov khoom puas yuav raug xa mus rau hauv qhov Normalized thiab Tempered (N + T) raws li ASTM A387 Qib 5 Chav Kawm 2?
Yog lawm, ASTM A387 Qib 5 Chav Kawm 2 hlau feem ntau yog xa hauv aNormalized thiab Tempered (N + T)qhov xwm txheej, uas yog tus qauv kev kho cua sov rau cov hlau no kom ua tiav nws cov lus teev tseg siab -kub txhua yam khoom, zoo li lub zog tensile zoo dua thiab nkag siab, ua rau nws zoo tagnrho rau cov hlab ntsha siab.
Koj puas ua Simulated Post-Weld Heat Treatment (S-PWHT) ntawm ASTM A387 Qib 5 Class2? Yog tias muaj, lub sijhawm soaking thiab kub yog dab tsi?
Yog lawm, Simulated PWHT (S-PWHT) yog ua nyob rau hauv ASTM A387 Gr 5 Cl 2 (Chrome-Moly Steel) kom txo tau cov kev ntxhov siab uas seem, tab sis cov sij hawm tshwj xeeb thiab kub (piv txwv li, 600-650℃rau 1-2 teev / nti, raws li cov cai xws li ASME deg1 Sec. VIII) 5, Hom 1 lossis 2) thiab daim ntawv thov, yuav tsum tau siv rau kev tswj hwm txoj cai (xws li ASME B31.3 lossis Tshooj VIII) kom tsis txhob muaj qhov tsis zoo los yog lub zog poob, nrog rau kev ntub dej ib ncig ntawm 600-650℃(1110-1200℃F) rau kev ntxhov siab.
Dab tsi yog qhov lav qhov tsawg kawg nkaus Charpy V-qhov cuam tshuam lub zog ntawm 0℃tom qab S-PWHT ntawm ASTM A387 Qib 5 Chav Kawm 2?
Rau ASTM A387 Qib 5 Chav Kawm 2 steel, qhov tsawg kawg nkaus Charpy V-notch zog tom qab ntawv-weld kho cua sov (PWHT) nyob ntawm thickness thiab xeem kev taw qhia (ntev/transverse), tab sis feem ntau yuav tsum tau27 Joules (J) rau kev xeem transversethiab41 Joules (J) rau kev ntsuas ntev, feem ntau kuaj ntawm qhov kub ntawm 0℃lossis qis dua nyob ntawm cov kev pabcuam, nrog rau cov qauv tshwj xeeb (xws li IACS UR W11) teeb tsa qhov tsawg kawg nkaus li 27J qhov nruab nrab rau daim hlau / ntu thiab 41J rau welds, tshwj xeeb tshaj yog nrog PWHT.
Sib npaug
| BS | EN | ASME | DIN |
| ... | ... | A387-5-2 | ... |
Specifications ASTM A387 Qib 5 Alloy Steel Phaj
| Lub npe | Nominal Chromium Cov ntsiab lus (%) |
Nominal Molybdenum Cov ntsiab lus (%) |
| A387 Qib 5 | 5.00% | 0.50% |
Tensile Requirements rau ASTM A387 Qib 5 Alloy Steel Phaj Class 2 Phaj
| Lub npe: | Yuav tsum muaj: | Qib 5 |
|
A387 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 ASTM A387 Qib 5 Alloy Steel Phaj
| Lub ntsiab | Chemical Composition (%) | |
| A387 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 |
1 Dab tsi yog ASTM A387 Qib 5 Chav Kawm 2?
ASTM A387 Qib 5 Chav Kawm 2 yog chromium-molybdenum alloy steel phaj tsim rau siab- kev pabcuam kub hauv cov welded boilers thiab cov hlab ntsha siab, muaj qhov zoo heev - kub lub zog, toughness, thiab txhim kho corrosion kuj vim nws cov ntsiab lus chromium. "Qib 5" txhais tau hais tias 4-6% chromium, thaum "Class 2" qhia tias muaj zog tensile ntau dua, thiab nws feem ntau yog muab rau hauv ib qho xwm txheej thiab tempered rau cov khoom siv kho kom zoo ntawm qhov kub siab.
2 Dab tsi yog ASTM A387 Qib 5 Class2 sib npaug?
ASTM A387 Qib 5 Chav Kawm 2 yog chromium -molybdenum alloy steel rau cov hlab ntsha siab, feem ntau sib npaug rauASME SA387 Qib 5 Chav Kawm 2, nrog European sib npaug suav nrogEN 10028-2 10CrMo5-5, thiab Lavxias teb sab qauv nyiamGOST 15 KHM, muab cov khoom siv tshwj xeeb (lub zog siab dua) thiab siab kub ua haujlwm vim nws ~ 5% Chromium thiab ~ 0.5% Molybdenum cov ntsiab lus.
3 Dab tsi yog qhov zoo ntawm ASTM A387 Qib 5 Chav Kawm 2?
Thawj qhov zoo ntawm ASTM A387 Qib 5 Qib 2 steel yog nwslub zog zoo heev ntawm qhov kub thiab txias, superior corrosion kuj (tshwj xeeb tshaj yog nyob rau hauv hnyav tshuaj / roj & roj ib puag ncig), weldability zoo, thiab txhim kho toughness / durability, ua tsaug rau nws cov ntsiab lus chromium thiab molybdenum, ua rau nws zoo tagnrho rau cov hlab ntsha siab, boilers, thiab cov khoom siv hauv high - cua sov, corrosive industries.
4 Dab tsi yog daim ntawv thov kev lag luam ntawm ASTM A387 Qib 5 Class2?
ASTM A387 Qib 5 Chav Kawm 2 daim hlau, chromium-molybdenum alloy hlau, feem ntau yog siv rau hauv siab -kub, siab- kev siv siab xws licov hlab ntsha, boilers, kub exchangers, thiab pipingnyob rau hauv lubroj & roj, petrochemical, tshuaj, thiab hluav taws xob tsim kev lag luam, muaj nuj nqis rau lawv lub zog, corrosion kuj, thiab weldability.
5 Dab tsi yuav tsum tau ceev faj thaum vuam ASTM A387 Qib 5 Chav Kawm 2?
Thaum vuam ASTM A387 Qib 5 Chav Kawm 2 (a
6 Yam Yuav Tsum Tau Ua Kev Xeem ASTM A387 Qib 5 Chav Kawm 2 yog dab tsi?
ASTM A387 Qib 5 Chav Kawm 2 yuav tsum muaj cov tshuaj muaj pes tsawg leeg (ib puag ncig 5% Chromium, 0.5% Molybdenum), kev kho cua sov (normalized thiab tempered), thiab cov khoom siv kho tshuab (tensile zog 75-100 ksi, yield 45 ksi min, 18% "). thiab lwm yam), kev sim tensile, thiab elongation, nrog rau kev ntsuam xyuas feem ntau ua rau cov ntawv siv qis, tag nrho cov ntaub ntawv los ntawm Mill Test Certificate (MTC).
7 Cov tshuaj muaj pes tsawg leeg ntawm ASTM A387 Qib 5 Chav Kawm 2 yog dab tsi?
ASTM A387 Qib 5 Chav Kawm 2 yog chromium-molybdenum alloy steel rau cov hlab ntsha siab, tus cwj pwm los ntawm nws cov chromium siab (4.00-6.00%) thiab molybdenum (0.45-0.65%) cov ntsiab lus, muab cov khoom kub kub zoo heev thiab kev tiv thaiv corrosion, nrog rau cov kev txwv tshwj xeeb ntawm 15% carbon (0. (0.30-0.60%), phosphorus (0.025% max), thiab sulfur (0.025% max).
Tau txais cov lus muaj nuj nqis rau ASTM A387 Qib 5 Chav Kawm 2, Hu rau GNEE Steel
