SA387 Qib 11 Chav Kawm 2 yog dab tsi?
SA387 Qib 11 Chav Kawm 2yog ib tug normalized thiab tempered chromium-molybdenum (Cr-Mo) alloy steel phaj tshwj xeeb yog tsim los rau kev tsim kho ntawm welded siab hlab ntsha thiab siab - kub Cheebtsam nyob rau hauv xav tau kev pab cuam.
Cov Khoom Tseem Ceeb & Lub Hom Phiaj
Kev kho cua sov: Cov txheej txheem normalized thiab tempered muab nws ua kom zoo, muaj zog microstructure (feem ntau bainitic), ua rau:
Lub zog siab dua: Piv nrog rau Chav Kawm 1 annealed, nws muaj qhov zoo tshaj li - xa cov khoom siv tshuab.
Zoo Toughness: Balanced ductility thiab cuam tshuam tsis kam rau siab ntawm lub nkoj siab.
Mechanical Properties (Hom raws li - muab):
Tensile zog: 485 - 620 MPa (70 - 90 ksi)
Yield zog (min): 275 MPa (40 ksi)
Zoo Ductility & Toughness
Siab -Kev Ua Haujlwm Kub: Lub Cr-Mo alloying muab:
Txhim kho lub zog ntawm qhov kub siab (piv rau carbon steel).
Tsis kam rau Oxidation (Scaling) thiab Hydrogen Attack.
Zoo Creep Resistance rau kev ua haujlwm ntev -.
Cov ntawv thov tseem ceeb
Nws yog cov xwm txheej feem ntau teev tseg rau Qib 11 daim hlau, siv hauv:
Petroleum Refining: Hydrotreater thiab hydrocracker hlab ntsha, reactors, separators.
Fais fab Generation: High-kub boilers, heat exchangers, thiab steam piping.
Chemical Processing: Cov hlab ntsha siab raug rau cov txheej txheem corrosive ntawm qhov kub siab.
Fabrication tsim nyog
Zoo li txhua qib Cr-Mo, nws yuav tsum muaj kev tswj xyuas nruj nruj (preheating, qis-hydrogen electrodes) thiab yuav tsum Post-Weld Heat Treatment (PWHT) tom qab kev tsim khoom los txo cov kev ntxhov siab thiab ua kom ntev - kev ua haujlwm hauv kev pabcuam.
Hauv cov ntsiab lus, SA387 Qib 11 Chav Kawm 2 yog tus qauv, siab dua - lub zog version ntawm 1.25Cr-0.5Mo alloy steel phaj, optimized rau kev txhim khu kev qha nyob rau hauv siab - kub, high-pressure siab hlab ntsha qhov twg lub zog thiab fabricability yog ob qho tib si tseem ceeb.
Sib npaug
| BS | EN | ASTM / ASME | DIN |
| 621 B | ––– | SA387-11-2 | ––– |
Specifications rau ASME SA387 Qib 11 Alloy Steel Phaj
Chromium & Molybdenum cov ntsiab lus (raws li ASME specification)
| Lub npe | Nominal Chromium Cov ntsiab lus (%) |
Nominal Molybdenum Cov ntsiab lus (%) |
| SA387 Qib 11 | 1.25% | 0.50% |
Tensile Requirements rau ASME SA387 Qib 11 Alloy Steel Phaj Chav Kawm 2 Phaj
| Lub npe: | Yuav tsum tau: | Qib 11 |
| SA387 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% | ––– |
Cov Khoom Siv Tshuaj Rau ASME SA387 Qib 11 Alloy Steel Phaj
| Lub ntsiab | Chemical Composition (%) | |
| SA387 Qib 11 | ||
| Cov pa roj carbon: | Kev Ntsuas Kub: | 0.05 - 0.17 |
| Product Analysis: | 0.04 - 0.17 | |
| Manganese: | Kev Ntsuas Kub: | 0.40 - 0.65 |
| Product Analysis: | 0.35 - 0.73 | |
| Phosphorus: | Kev Ntsuas Kub: | 0.035 |
| Product Analysis: | 0.035 | |
| Sulfur (max): | Kev Ntsuas Kub: | 0.035 |
| Product Analysis: | 0.035 | |
| Silicon: | Kev Ntsuas Kub: | 0.50 - 0.80 |
| Product Analysis: | 0.44 - 0.86 | |
| Chromium: | Kev Ntsuas Kub: | 1.00 - 1.50 |
| Product Analysis: | 0.94 - 1.56 | |
| Molybdenum: | Kev Ntsuas Kub: | 0.45 - 0.65 |
| Product Analysis: | 0.45 - 0.70 |
1. SA387 Qib 11 Chav Kawm 2 yog dab tsi?
SA387 Qib 11 Chav Kawm 2 yog ib qho qub thiab tempered chromium-molybdenum (1¼Cr-½Mo) alloy steel phaj tsim los rau siab -kub siab cov hlab ntsha, muab lub zog siab dua li Chav Kawm 1 thaum tswj kev zoo weldability thiab creep kuj nyob rau hauv refinery kev pab cuam.
2. Cov khoom siv kho tshuab ntawm SA387 Qib 11 Chav Kawm 2 yog dab tsi?
Nyob rau hauv nws qhov normalized thiab tempered mob, SA387 Qib 11 Chav Kawm 2 muab lub zog tensile ntawm 485–620 MPa (70–90 ksi) thiab qhov tsawg kawg nkaus tawm lub zog ntawm 275 MPa (40 ksi), ua rau nws haum rau siab - kev nyuaj siab, elevated - kub tsim
3. SA387 Qib 11 Chav Kawm 2 txawv li cas ntawm Chav Kawm 1?
Class 2 yog normalized thiab tempered rau siab dua li -suplied zog, thaum Class 1 yog annealed rau siab tshaj formability; ob leeg sib koom tib yam tshuaj muaj pes tsawg leeg tab sis raug xaiv raws li fabrication xav tau kev pab thiab tsim kom muaj kev ntxhov siab.
4. Qhov kev pabcuam siab tshaj plaws rau SA387 Qib 11 Chav Kawm 2 yog dab tsi?
SA387 Qib 11 Chav Kawm 2 feem ntau yog siv hauv kev pabcuam txuas ntxiv mus txog 595℃(1100℃F), qhov twg nws cov ntsiab lus chromium thiab molybdenum muab kev tiv thaiv zoo rau oxidation thiab hydrogen nres.
5. Dab tsi yog cov ntawv thov rau SA387 Qib 11 Chav Kawm 2 daim hlau?
Qib no yog siv dav hauv hydrotreaters, hydrocrackers, heat exchangers, thiab lwm yam siab -kub siab cov hlab ntsha hauv petrochemical refineries thiab fais fab - tiam.
6. Cov txheej txheem vuam dab tsi yuav tsum tau ua rau SA387 Qib 11 Chav Kawm 2?
Vuam yuav tsum tau qis -hydrogen electrodes, preheating (150–205℃/ 300–400℃F), thiab yuav tsum tau post-weld heat treatment (PWHT) nyob ib ncig ntawm 620–690℃(1150–1275℃F) los tiv thaiv kev tawg thiab rov ua kom corrosion.
7. Qhov sib npaug European qib rau SA387 Qib 11 Chav Kawm 2 yog dab tsi?
Qhov sib npaug nyob sab Europe zoo tshaj plaws yog 13CrMo4-5 (1.7335) raws li EN 10028-2, uas muaj cov ntsiab lus zoo sib xws thiab feem ntau muab nkag rau hauv ib qho xwm txheej thiab tempered.
8. SA387 Qib 11 Chav Kawm 2 piv rau Qib 22 li cas?
Qib 11 (1.25Cr-0.5Mo) muaj qis dua - qhov kub thiab txias zog thiab hydrogen tsis kam tshaj Qib 22 (2.25Cr-1Mo), ua rau nws muaj txiaj ntsig zoo rau kev pab cuam nruab nrab hauv kev ua kom zoo thiab cov txheej txheem tshuaj lom neeg.
9. Charpy cuam tshuam dab tsi rau SA387 Qib 11 Chav Kawm 2 yog dab tsi?
Charpy V-notch impact test feem ntau teev los ntawm cov neeg yuav khoom; Cov kev xav tau ntau tshaj yog 20 J (15 ft-lb) qhov nruab nrab qhov nruab nrab ntawm qhov kub ntawm +10℃F thiab -20℃F (–12℃txog -29 degree) rau kev siv lub nkoj siab.
10. Qhov txawv ntawm SA387 Qib 11 Chav Kawm 2 thiab AISI 4130 yog dab tsi?
Thaum ob qho tib si yog Cr-Mo steels, SA387 Qib 11 Chav Kawm 2 yog cov khoom siv phaj rau cov hlab ntsha siab nrog cov kev cai nruj thiab kev sim, qhov AISI 4130 yog lub hom phiaj dav dav / bar alloy nrog cov khoom sib txawv thiab kev siv.
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 cov qauv tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
