SA387 Qib 11 Chav Kawm 1yog ib qho chromium-molybdenum alloy steel phaj tau teev tseg raws li ASME SA387 tus qauv, feem ntau yog siv rau welded siab hlab ntsha thiab boiler Cheebtsam uas ua haujlwm ntawm qhov kub siab. Nws muaj cov nominal muaj pes tsawg leeg ntawm ib ncig ntawm 1.00-1.50% chromium thiab 0.45-0.65% molybdenum, uas muab zoo siab - kub lub zog, creep resistance, thiab oxidation kuj. Chav Kawm 1 qhia txog cov txheej txheem ntawm cov ntsiab lus carbon thiab cov khoom siv kho tshuab, nrog qhov tsawg kawg nkaus tensile lub zog feem ntau nyob rau hauv thaj tsam ntawm 60-80 ksi thiab qhov tsawg kawg nkaus yield zog ntawm 30 ksi. Cov qib no feem ntau siv rau hauv cov khoom siv refinery, petrochemical reactors, kub exchangers, thiab fais fab nroj tsuag boilers qhov twg txhim khu kev qha kev ua tau zoo nyob rau hauv siab thiab kub yuav tsum tau.
Sib npaug
| BS | EN | ASTM / ASME | DIN |
| 621 B | ––– | SA387-11-1 | ––– |
Specifications rau ASME SA387 Qib 11 Alloy Steel Phaj
| 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 1 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
| Element | 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 |
Cov txheej txheem tseem ceeb
Kev kho cua sov:
Cov khoom siv tau muab rau hauv cov xwm txheej tshwj xeeb, feem ntau Normalized & Tempered (N&T) lossis Quenched & Tempered (Q&T).
Preheating:
Yuav tsum tau vuam los tiv thaiv kev tawg, feem ntau ntawm qhov kub ntawm 1100℃F (593 degree) rau Qib 11.
Tshaj tawm -Weld Heat Treatment (PWHT):
Yuav tsum tau siv rau ntau daim ntawv thov, suav nrog kev tuav ntawm qhov kub thiab txias (xws li, 1150℃F min rau Qib 11) rau lub sijhawm teem raws li tuab, ua raws li kev tswj kom txias.
Tswj Cooling:
Qhov tseem ceeb tom qab kev kho cua sov, nrog rau cov nqi tshwj xeeb kom ua tiav qhov xav tau microstructures thiab cov khoom.
Cov ntawv thov tseem ceeb
Roj & Roj:
Cov hlab ntsha siab, lub tank cia, reactors, thiab cov kav dej rau kev ua thiab khaws cia siab -kub kua thiab roj.
Petrochemical Kev Lag Luam:
Cov khoom siv hauv refineries thiab tshuaj nroj tsuag uas ua haujlwm nyob rau hauv huab cua kub heev.
Kev tsim hluav taws xob:
Cheebtsam hauv thermal fais fab nroj tsuag, boilers, thiab chav piping systems.
Thaum tshav kub kub Exchangers:
Siv qhov chaw kub thiab corrosive media.
Vim li cas thiaj siv
High -Tsev Kev Pabcuam:Tshwj xeeb tsim los rau kev siv kub siab.
Corrosion Resistance:Chromium cov ntsiab lus muab kev tiv thaiv zoo heev rau oxidation thiab qaub roj ib puag ncig.
Creep Resistance:Molybdenum txhim kho nws lub peev xwm los tiv thaiv deformation nyob rau hauv kev ntxhov siab nyob rau hauv qhov kub thiab txias.
Cov txiaj ntsig tseem ceeb:
High -Tsub Ua Haujlwm:
Zoo heev mechanical zog thiab stability ntawm siab kub thiab nyob rau hauv siab siab.
Corrosion Resistance:
Chromium cov ntsiab lus muab kev tiv thaiv zoo rau oxidation thiab hydrogen nres, tseem ceeb heev rau kev pabcuam qaub (H₂S) ib puag ncig.
Lub zog & Toughness:
Muab qhov zoo tensile lub zog thiab toughness rau kev txhim khu kev qha kev ua tau zoo nyob rau hauv kev ntxhov siab -induced tej yam kev mob.
Weldability & Fabricability:
Nws tuaj yeem yooj yim txiav, tsim, thiab welded siv cov txheej txheem tsim nyog, ua kom cov qauv tsim.
Enhanced Safety & Durability:
Nws cov khoom txo qis kev pheej hmoo tsis ua haujlwm thiab txuas ntxiv lub neej kev pabcuam hauv cov xwm txheej hnyav, ua rau kev saib xyuas qis dua.
Tus nqi -zoo:
Muab qhov zoo tshaj plaws ntev -lub sij hawm tus nqi thiab kev ua tau zoo rau kev thov rau daim ntawv thov piv rau cov ntaub ntawv tshwj xeeb tsawg.
Vim li cas thiaj xaiv peb:
Koj tuaj yeem tau txais cov khoom zoo meej raws li qhov koj xav tau ntawm tus nqi tsawg kawg nkaus.
Peb kuj muab Reworks, FOB, CFR, CIF, thiab qhov rooj rau qhov rooj tus nqi xa khoom. Peb xav kom koj ua deal rau shipping uas yuav zoo heev.
Cov ntaub ntawv uas peb muab yog muaj tseeb tiag, txoj cai los ntawm raw cov ntaub ntawv xeem daim ntawv pov thawj mus rau qhov kawg dimensional nqe lus.
Peb lav muab cov lus teb tsis pub dhau 24 teev (feem ntau hauv tib lub sijhawm)
Koj tuaj yeem tau txais cov khoom hloov pauv, zeb xa khoom nrog txo lub sijhawm tsim khoom.
Peb tau mob siab rau peb cov neeg siv khoom. Yog tias nws yuav tsis tuaj yeem ua tau raws li koj cov kev xav tau tom qab kuaj xyuas tag nrho cov kev xaiv, peb yuav tsis ntxias koj los ntawm kev cog lus tsis tseeb uas yuav tsim kev sib raug zoo rau cov neeg siv khoom.
Tiv tauj peb ntawm beam@gneesteelgroup.com rau tus nqi, kev txhawb nqa, lossis kev daws teeb meem. Peb yeej ib txwm npaj los txhawb koj qhov project.
Dab tsi yog qhov cuam tshuam toughness ntawm SA387 Qib 11 Chav Kawm 1?
Nws Charpy V-qhov cuam tshuam lub zog muaj zog ntau dua lossis sib npaug li 27 J ntawm chav tsev kub, ua kom muaj zog zoo los tiv thaiv kev cuam tshuam tam sim ntawd hauv kev pabcuam.
Puas yog qib steel no siv nyob rau hauv nuclear fais fab nroj tsuag?
Tsis tshua muaj, raws li lub zog nuclear xav tau cov qauv khoom nruj dua. Nws yog tsuas yog siv nyob rau hauv cov pa thermal zog thiab petrochemical teb xwb.
Puas yog SA387 Qib 11 Chav Kawm 1 sib nqus?
Yog, nws yog magnetic. Vim nws cov qauv ferritic tshwm sim los ntawm cov ntsiab lus chromium, nws nthuav tawm cov khoom sib nqus, tsis zoo li austenitic stainless hlau.
SA387 Qib 11 Chav Kawm 1 ua raws li tus qauv twg?
Nws ua raws li ASTM A387 tus qauv, uas qhia meej txog qhov yuav tsum tau ua rau qis- alloy steel phaj rau cov hlab ntsha siab hauv siab - qhov kev pabcuam kub.
Qhov txawv ntawm Chav Kawm 1 thiab Chav Kawm 2 ntawm SA387 Qib 11 yog dab tsi?
Chav Kawm 1 muaj cov ntsiab lus qis dua cov pa roj carbon monoxide thiab kev tswj hwm tsis zoo tshaj li Chav Kawm 2, muab cov weldability zoo dua thiab tawv, haum rau cov khoom tuab.
Cov txheej txheem kho cua sov ua ntej xa khoom yog dab tsi?
Kev kho cua sov zoo yog normalizing + tempering. Normalizing refines nplej, thaum tempering txo brittleness thiab kho txhua yam khoom.
Dab tsi yog microstructure ntawm SA387 Qib 11 Chav Kawm 1 tom qab kev kho cua sov?
Tom qab normalizing thiab tempering, nws cov microstructure yog tempered bainite los yog ferrite -pearlite, uas muab zoo zog thiab toughness.
SA387 Qib 11 Chav Kawm 1 puas tuaj yeem ua tau yooj yim?
Nws muaj nruab nrab machinability. Siv cov cuab yeej siab - ceev steel los yog carbide nrog cov kev txiav kom raug ua kom cov machining du yam tsis muaj cov cuab yeej siv ntau dhau.
Qhov kub li cas cuam tshuam lub zog ntawm cov hlau no?
Lub zog txo nrog qhov kub thiab txias. Hauv qab 593 degree, nws muaj zog ruaj khov; Tsis tas li ntawd, qhov poob nrawm nrawm, cuam tshuam rau kev pabcuam kev nyab xeeb.
Dab tsi yog qhov siab tshaj carbon cov ntsiab lus tso cai hauv qib steel no?
Qhov siab tshaj plaws carbon cov ntsiab lus yog 0.20%. Tshaj qhov no yuav txo qhov weldability thiab toughness, ua rau muaj kev pheej hmoo ntawm cov kab nrib pleb thaum ua.
Dab tsi yog lwm txoj hauv kev rau SA387 Qib 11 Chav Kawm 1?
Lwm txoj hauv kev suav nrog SA387 Qib 12 Chav Kawm 1 (cov ntsiab lus qis dua Cr) thiab SA387 Qib 22 Chav Kawm 1 (siab dua Cr-Mo cov ntsiab lus), xaiv raws li cov kev pabcuam.