A387 Qib 11 Chav Kawm 1yog chromium-molybdenum alloy steel phaj tau teev tseg raws li tus qauv ASTM A387, dav siv hauv kev tsim cov hlab ntsha siab thiab cov khoom siv boiler uas ua haujlwm ntawm qhov kub siab. Nws belongs rau tsev neeg ntawm tsawg- alloy steels uas muaj ib tug nruab nrab ntawm chromium thiab molybdenum, uas imparts zoo zog, creep tsis kam, thiab tsis kam mus rau hydrogen nres nyob rau hauv siab - kub kev pab cuam ib puag ncig. Chav Kawm 1 qhia txog kev kho cua sov zoo li qub thiab ua kom sov, ua rau muaj kev ua kom zoo nkauj microstructure uas sib npaug toughness thiab lub zog rau kev txhim khu kev qha nyob rau hauv thermal thiab mechanical stress. Cov qib no feem ntau yog ua haujlwm hauv cov roj refineries, petrochemical cov nroj tsuag, thiab cov chaw tsim hluav taws xob uas cov cuab yeej raug rau siab - siab thiab siab - cov kua dej kub.
Sib npaug
| BS | EN | ASTM / ASME Cov | DIN |
| 621 B | ––– | A387-11-1 | ––– |
Specifications rau ASTM A387 Qib 11 Alloy Steel Phaj
| Lub npe | Nominal Chromium Cov ntsiab lus (%) |
Nominal Molybdenum Cov ntsiab lus (%) |
| A387 Qib 11 | 1.25% | 0.50% |
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% | ––– |
Cov Khoom Siv Tshuaj Rau ASTM A387 Qib 11 Alloy Steel Phaj
| Element | Chemical Composition (%) | |
| A387 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 |
kev tsim khoom
1. Kev tsim khoom tseem ceeb
Hlau Melting: Cov khoom siv yog tsim los ua hlau tua (deoxidized) los tiv thaiv porosity thiab xyuas kom muaj kev ncaj ncees.
Refining: Cov txheej txheem zoo li lub tshuab nqus tsev degassing tuaj yeem siv los tshem tawm impurities thiab gases.
Kev Tsim: Cov phaj feem ntau yog tsim los ntawm Kev Kub Rolled (HR) txoj kev.
2. Kev kho cua sov
Qhov no yog theem tseem ceeb tshaj plaws rau kev ua tiav cov khoom siv kho tshuab:
Normalizing: Cua sov rau 900-950℃(1650-1740℃F) ua raws li cua txias kom ua kom cov nplej loj.
Tempering: Reheating tsawg kawg yog 650℃(1200℃F) kom txo tau brittleness thiab ua kom tawv.
Lwm txoj kev (Q + T): Qee daim ntawv thov yuav siv quenched thiab Tempered ua los txhim kho hardness.
3. Fabrication & Vuam
Preheating: Yuav tsum tau ua ntej vuam los tiv thaiv thermal shock, feem ntau ntawm 121℃thiab 150℃(250-300℃F).
Tom qab-Kev Kho Hniav Kub Kub (PWHT): Feem ntau yuav tsum tau siv rau kev siv lub nkoj siab raws li cov qauv xws li ASME BPVC Tshooj VIII txhawm rau txo qis kev ntxhov siab.
4. Kev Tswj Xyuas Zoo
Standard xeem muaj xws li:
Tension Test: Txheeb xyuas cov txiaj ntsig thiab lub zog tensile.
Tsis yog-Kev Ntsuam Xyuas Kev Ua Phem (NDT): suav nrog Kev Ntsuas Sib Nqus (MT), Kev Ntsuas Ultrasonic (UT), lossis Kev Ntsuas Hluav Taws Xob (RT) rau kev sib tw vuam.
Simulated PWHT: Kev ntsuas ntxiv tuaj yeem ua kom ntseeg tau tias cov khoom tseem nyob hauv qhov tshwj xeeb tom qab tus neeg siv khoom tsim cov txheej txheem.
daim ntawv thov
Siab hlab ntsha thiab boilers
Siv nyob rau hauv fabrication ntawm siab hlab ntsha, boilers, thiab lwm yam Cheebtsam uas ua hauj lwm nyob rau hauv high kub thiab pressures, qhov twg zoo creep kuj thiab lub zog tuav yuav tsum tau.
Cov khoom siv roj refinery
Siv nyob rau hauv refinery units xws li reactors, heat exchangers, thiab piping systems uas lis kub hydrocarbons thiab cov txheej txheem kua.
Petrochemical thiab chemical processing
Siv nyob rau hauv reactors, kem, thiab kub exchangers nyob rau hauv petrochemical thiab tshuaj nroj tsuag, tshwj xeeb tshaj yog nyob rau hauv cov kev pab cuam uas muaj qhov kub thiab txias thiab hydrogen{0}} muaj ib puag ncig.
Fais fab tuag systems
Pom muaj nyob rau hauv cov khoom siv hluav taws xob, suav nrog cov boilers, lub tshuab hluav taws xob, thiab cov khoom siv sib txuas, qhov uas tiv taus siab -kub oxidation thiab creep yog qhov tseem ceeb.
Lwm cov khoom siv ua haujlwm kub -
Siv rau hauv ntau daim ntawv thov kev lag luam uas xav tau cov ntawv hlau nrog cov qib siab zoo - qhov kub thiab txias tsis kam tiv thaiv hydrogen nres, xws li hauv qee cov txheej txheem cua sov thiab cov khoom siv rauv.
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.
Qhov ntsuas kub cuam tshuam li cas rau cov khoom siv kho tshuab ntawm A 387 Gr 11 CL 1?
Ntawm qhov kub siab (txog 593℃/ 1100℃F), nws khaws zoo tensile zog, nkag siab, thiab qaug zog piv rau carbon steel. Tshaj qhov kub no, nws cov khoom maj mam degrade.
Brinell hardness (HB) ntau ntawm A 387 Gr 11 CL 1 yog dab tsi?
Brinell hardness ntau yam yog 130-180 HB, uas qhia txog nws cov hardness nruab nrab thiab machinability.
Kev kho cua sov txheem rau A 387 Gr 11 CL 1 yog dab tsi?
Cov txheej txheem kev kho cua sov yog normalizing thiab tempering. Normalizing yog ua tiav ntawm 899-954℃(1650-1750℃F), ua raws li cua txias; tempering yog ntawm 593-704℃(1100-1300℃F) kom txo tau kev ntxhov siab thiab txhim kho toughness.
A 387 Gr 11 CL 1 puas tuaj yeem welded?
Yog, nws yog weldable. Txawm li cas los xij, preheating (feem ntau 150-260℃/ 300-500℃F) thiab kev kho cua sov tom qab vuam (PWHT) yuav tsum tau tiv thaiv kom tsis txhob txias tawg thiab txo cov kev ntxhov siab, kom ntseeg tau qhov sib koom ua ke ntawm kev sib koom ua ke.
Dab tsi yog cov ntawv thov tseem ceeb ntawm A 387 Gr 11 CL 1?
Nws yog dav siv nyob rau hauv kev tsim cov hlab ntsha siab, boilers, tshav kub exchangers, thiab petrochemical cov khoom uas ua hauj lwm nyob rau hauv siab kub, xws li refinery reactors, chav generators, thiab catalytic crackers.
Qhov kev pabcuam siab tshaj plaws rau A 387 Gr 11 CL 1 yog dab tsi?
Nws qhov siab tshaj plaws kev pabcuam kub kub yog kwv yees li 593℃(1100℃F). Tshaj li qhov ntsuas kub no, nws cov creep thiab oxidation kuj poob qis heev.
Qhov txawv ntawm A 387 Gr 11 CL 1 thiab A 387 Gr 12 CL 1 yog dab tsi?
Qhov sib txawv tseem ceeb yog cov ntsiab lus molybdenum: Gr 11 CL 1 muaj 0.45-0.65% Mo, thaum Gr 12 CL 1 muaj 0.87-1.13% Mo. Gr 12 CL 1 muaj qhov zoo dua qhov kub thiab txias tsis kam, tab sis kim dua.
Dab tsi yog qhov yuav tsum tau muaj ntawv pov thawj rau A 387 Gr 11 CL 1 daim hlau?
Cov phaj yuav tsum tau ntawv pov thawj raws li ASME SA-387, suav nrog cov ntaub ntawv xeem cov ntaub ntawv (MTRs) nrog cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab cov ntaub ntawv kho cua sov. Kev tshuaj xyuas thib peb (piv txwv li, ABS, DNV) tej zaum yuav xav tau rau cov ntawv thov tseem ceeb.
Dab tsi yog qhov tuab tuab ntawm A 387 Gr 11 CL 1 daim hlau?
Tus qauv thickness ntau yog 6 hli mus rau 200 hli (0.24 nti rau 7.87 nti). Cov phaj tuab tuaj yeem muaj nyob rau ntawm kev thov tab sis xav tau kev kho cua sov tshwj xeeb kom ntseeg tau tias cov khoom siv tsis sib xws.