SA387 Qib 11 Chav Kawm 1yog chromium-molybdenum alloy steel phaj rau siab-kub siab cov hlab ntsha, muab lub zog zoo thiab corrosion kuj, tshwj xeeb tshaj yog rau cov roj / roj / petrochemical siv nrog cov roj qaub; nws muaj zog tensile qis dua Chav Kawm 2 (60-85 ksi) thiab ib qho tshwj xeeb muaj pes tsawg leeg nrog ~ 1.25% Cr thiab ~ 0.5% Mo, tsim rau cov kev pabcuam siab.
Cov yam ntxwv tseem ceeb:
Hom:Chromium{0}}Molybdenum Alloy Steel Phaj.
Daim ntawv thov:Welded boilers, siab hlab ntsha, siab - cov khoom kub, tshwj xeeb tshaj yog nyob rau hauv cov roj, roj, thiab petrochemical industries.
Khoom:Lub zog zoo heev, tiv thaiv tshav kub, thiab tiv thaiv corrosion / oxidation, tshwj xeeb tshaj yog los ntawm qaub roj (H2S).
Kev sib xyaw (Approx.):~ 1.25% Chromium (Cr), ~ 0.5% Molybdenum (Mo).
Sib npaug
| BS | EN | ASTM / ASME Cov | 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 |
kev ua haujlwm ua haujlwm
1. Kev kho cua sov (Qhov tseem ceeb tshaj plaws)
Cov khoom siv hauv chav kawm 1 tau ua tiav kom ua tiav cov khoom siv kho tshuab tshwj xeeb (qis zog tab sis siab dua ductility piv rau Chav Kawm 2).
Normalizing: Cov phaj yog rhuab mus rau qhov kub austenitizing (feem ntau yog 1650℃F - 1750℃F / 900℃- 955℃) thiab txias hauv huab cua.
Tempering: Tom qab normalizing, cov hlau yuav tsum tau tempered ntawm qhov tsawg kawg nkaus kub ntawm 1150℃F (620 degree) los kho cov microstructure thiab txo cov kev ntxhov siab sab hauv.
Annealing: Xwb, cov khoom tuaj yeem ua tiav tag nrho kom ua tiav qhov siab tshaj plaws rau kev sib sau ua ke.
2. Txiav thiab sib sau
Thermal Cutting: tuaj yeem txiav siv oxy- roj lossis ntshav. Vim yog cov ntsiab lus chromium, cov cua sov- cuam tshuam cheeb tsam (HAZ) tuaj yeem tawv; Yog li ntawd, preheating lub phaj ua ntej txiav yog feem ntau pom zoo kom tiv thaiv ntug cracking.
Cold forming: Haum rau me me dabtsi yog khoov. Txawm li cas los xij, vim tias nws yog cov hlau alloy, lub caij nplooj ntoos hlav- rov qab yog ntau tshaj li cov hlau.
Kub txoj kev: Feem ntau ua ntawm 1650℃F thiab 1900℃F (900℃- 1040℃). Yog tias qhov kub sib sau ua tiav, cov khoom siv feem ntau yuav tsum tau ua kom tiav - kev kho cua sov (Normalizing & Tempering) los kho nws cov khoom pov thawj.
3. Kev xav tau ntawm vuam
SA387 Gr. 11 raug cais raws li P-Number 4 cov ntaub ntawv raws li ASME Tshooj IX.
Preheating: Qhov tseem ceeb los tiv thaiv hydrogen-induced cracking. Preheating kub feem ntau yog li ntawm 300℃F txog 500℃F (150℃- 260 degree) nyob ntawm thickness.
Ncej -Weld Heat Treatment (PWHT): Qhov no yog qhov yuav tsum tau ua rau feem ntau ntawm cov hlab ntsha siab. Qhov feem ntau ntawm PWHT yog 1200℃F mus rau 1300℃F (650℃- 705 degree) los xyuas kom meej weld ductilty thiab kev ntxhov siab.
4. Machining
Yam ntxwv: Lub alloy lub toughness ua rau nws me ntsis nyuaj rau tshuab dua li cov qauv carbon steel.
Tooling: High-Speed steel (HSS) los yog cov cuab yeej carbide tau pom zoo nrog cov dej txias zoo sib xws los tiv thaiv kev ua haujlwm nyuaj.
5. Kev soj ntsuam zoo (Tsim)
Tom qab ua tiav, cov khoom yuav tsum tau xyuas los ntawm:
Mechanical Testing: Paub meej Tensile Strength (60–85 ksi) thiab Yield Strength (min 35 ksi).
Nondestructive Examination (NDE): Siv Ultrasonic Testing (UT) ib SA435 lossis SA578 los xyuas kom meej lub suab sab hauv.
Charpy V-Kev Ntsuas Qhov Ntsuas: Ua tau yog tias qis- qhov kub thiab txias yog qhov yuav tsum tau ua los ntawm txoj haujlwm tshwj xeeb.
Primary Industrial Applications
Vim nws cov chromium-molybdenum (Cr-Mo) muaj pes tsawg leeg, qib steel no tau siv dav hauv cov haujlwm hauv qab no:
Roj thiab Gas & Petrochemicals:
Cov nkoj siab:Nws yog siv los ua cov khoom tseem ceeb rau cov hlab ntsha thiab lub taub hau hauv refineries.
Kev Pab Cuam Roj:Nws tsis kam mus rau hydrogen sulfide (𝐻2𝑆) ua rau nws tseem ceeb rau kev tuav cov "kua" roj thiab roj media.
Reactors & Cia Tank:Fabrication ntawm siab -kub tshuaj reactors thiab tso tsheb hlau luam rau cov xov xwm kub.
Kev tsim hluav taws xob:
Muaj boilers:Siv nyob rau hauv kev tsim kho ntawm welded boilers thiab chav nruas.
Thaum tshav kub kub Exchangers:Zoo dua rau cov raj condenser thiab cov cua kub exchanger plhaub vim thermal stability.
Nuclear & Thermal Cog:Ua haujlwm hauv cov tshuab pabcuam thiab siab -kub ducting.
Kev Siv Tshuaj:
Piping Systems:Siv rau siab - qhov kub thiab txias piping.
Valves & Flanges:Kev tsim cov khoom forged xws li flanges, li qub, thiab cov yeeb nkab clamps.
Thov kom muaj kev tshaj lij rau SA387 Qib 11 Chav Kawm 1 los ntawm GNEE Steel.
SA387 Qib 11 Chav Kawm 1 yog dab tsi?
Nws yog qis- alloy steel phaj rau cov hlab ntsha siab, feem ntau yog tsim los ntawm carbon thiab chromium. Nws muaj qhov zoo siab - kub lub zog thiab corrosion kuj, dav siv hauv cov khoom siv petrochemical.
Dab tsi yog cov tshuaj lom neeg tseem ceeb ntawm qib steel no?
Cov khoom tseem ceeb yog hais txog 0.15-0.20% C, 0.80-1.10% Cr, nrog me me ntawm Mn, Si, P thiab S, kom ntseeg tau tias nws cov khoom siv tshuab thiab kub kub.
Qhov kev pabcuam siab tshaj plaws ntawm SA387 Qib 11 Chav Kawm 1 yog dab tsi?
Nws qhov siab tshaj plaws kev pabcuam kub kub yog nyob ib ncig ntawm 593℃(1100℃F). Ntxiv rau qhov no, nws lub zog thiab kev ruaj ntseg ntawm cov qauv yuav txo qis.
Qhov kev lag luam twg yog qib steel no feem ntau siv hauv?
Nws yog dav siv nyob rau hauv petrochemical, refinery thiab fais fab kev lag luam, tshwj xeeb tshaj yog rau cov hlab ntsha siab, boilers thiab tshav kub exchangers.
Lub zog tensile ntau ntawm SA387 Qib 11 Chav Kawm 1 yog dab tsi?
Nws lub zog tensile yog feem ntau ntawm 415-585 MPa. Qhov no ua kom ntseeg tau tias nws tuaj yeem tiv taus siab hauv qhov chaw ua haujlwm hnyav.
Yuav ua li cas los txhim kho lub weldability ntawm no steel qib?
Preheating rau 150-200℃ua ntej vuam thiab tom qab vuam kub kho (PWHT) tuaj yeem txo qhov kev ntxhov siab ntawm vuam thiab tiv thaiv cov kab mob khaub thuas, txhim kho weldability.
Yam tsawg kawg nkaus tawm lub zog ntawm SA387 Qib 11 Chav Kawm 1 yog dab tsi?
Qhov tsawg kawg nkaus tawm lub zog yog 205 MPa. Qhov kev ntsuas no qhia txog nws lub peev xwm los tiv thaiv cov yas deformation nyob rau hauv kev thauj khoom, tseem ceeb rau kev siab -cov kabmob.
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 daim hlau rau cov hlab ntsha hauv siab - qhov kub thiab txias.
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 kev sib txuas zoo dua thiab tawv, haum rau cov khoom tuab.