SA 387 Qib 5 Chav Kawm 1yog ib qho chromium-molybdenum (Cr-}Mo) alloy steel phaj siv rau weldable siab hlab ntsha thiab boilers ua haujlwm ntawm qhov kub siab, muab lub zog tensile zoo ntawm kub kub thiab txhim kho corrosion vim nws cov ntsiab lus alloy. Nws yog cov khoom siv muaj zog tsim nyog rau kev thov hauv cov roj, roj, thiab kev lag luam fais fab, uas muaj cov tshuaj lom neeg muaj pes tsawg leeg (ib puag ncig 5% Chromium, 0.4-0.7% Molybdenum) thiab cov khoom siv kho tshuab uas txawv ntawm Chav Kawm 2.
Sib npaug
| BS | EN | ASME | DIN |
| ... | ... | SA387-5-1 | ... |
Specifications ASME SA387 Qib 5 Alloy Steel Phaj
| Lub npe | Nominal Chromium Cov ntsiab lus (%) |
Nominal Molybdenum Cov ntsiab lus (%) |
| SA387 Qib 5 | 5.00% | 0.50% |
Tensile Requirements rau ASME SA387 Qib 5 Alloy Steel Phaj Chav Kawm 1 Phaj
| Lub npe: | Yuav tsum tau: | Qib 5 |
|
SA387 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 ASME SA387 Qib 5 Alloy Steel Phaj
| Element | Chemical Composition (%) | |
| SA 387 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 |
Kev Ua Haujlwm Kev Ua Haujlwm ntawm SA 387 Qib 5 Chav Kawm 1
1. Kev npaj khoom & tshuaj xyuas
Kev tsim khoom: Ua los ntawm cov txheej txheem kub - dov.
Tshuaj ntsuam xyuas: Kev txheeb xyuas ntawm Chromium (4.00–6.00%) thiab Molybdenum (0.45–0.65%) cov ntsiab lus.
NDE (Tsis yog-Kev kuaj xyuas kev puas tsuaj): Ultrasonic Testing (UT) rau ASME SA-435 kom ntseeg tau tias tsis muaj qhov cuam tshuam hauv laminar.
2. Txiav thiab sib sau
Txiav: Plasma lossis nplaim taws yog siv. Vim Qib 5 yog huab cua- hardening alloy, cov cua sov- cuam tshuam cov npoo yuav tsum yog hauv av kom tshem tawm cov txheej tawv tawv.
Cold/Hot forming: Chav kawm 1 cov khoom yog muab rau hauv cov annealed los yog normalized- thiab - tempered mob, muab siab tshaj plaws ductility rau dov los yog dabtsi yog khoov rau hauv cov hlab ntsha.
3. Cov txheej txheem vuam (P-Tsis yog. 5A Pab Pawg 1)
Preheating: Qhov tseem ceeb los tiv thaiv hydrogen-induced cracking. Preheating kub feem ntau yog li ntawm 300℃F txog 500℃F (150℃txog 260 degree) nyob ntawm thickness.
Filler Hlau: Tsawg hydrogen electrodes (piv txwv li, E8018-B6) yuav tsum tau ua kom haum rau lub hauv paus hlau chemistry.
Interpass Kub: Yuav tsum tau tswj nruj me ntsis (feem ntau khaws cia qis dua 600℃F / 315℃).
4. Kev kho cua sov (theem tseem ceeb)
Chav kawm 1 raws li txoj cai yuav tsum muaj cov khoom siv tshwj xeeb (Tensile Strength: 60-85 ksi / 415-585 MPa).
Annealing: Cua sov mus rau qhov tseem ceeb ntau yam thiab txias maj mam hauv qhov cub.
Normalizing & Tempering:
Normalizing: Cua txias los ntawm saum toj no transformation kub.
Tempering: Yuav tsum tau ua ntawm qhov kub tsawg kawg nkaus ntawm 1300℃F (705 degree) kom ntseeg tau tias cov khoom mus txog qib 1 ntawm lub xeev ductile.
5. Tshaj tawm -Weld Heat Treatment (PWHT)
Yuav tsum tau ua rau SA 387 Qib 5.
Lub rooj sib txoos yog tuav ntawm kwv yees li 1300℃F - 1400℃F (705℃- 760℃) los txo cov kev ntxhov siab uas seem thiab txhim kho cov tawv tawv ntawm thaj chaw weld.
6. Kev Xeem Kawg & Ntawv Pov Thawj
Mechanical Testing: Tensile, Yield, thiab Elongation tests.
Kev Ntsuam Xyuas Kev Nyuaj Siab: Charpy V-kev ntsuas ntsuas yog tias xav tau los ntawm cov cai tshwj xeeb ntawm lub nkoj tsim qauv (xws li ASME Tshooj VIII).
Kawg NDT: Sib Nqus Particle (MT) lossis Radiographic Testing (RT) ntawm tag nrho cov weld seams.
Daim ntawv thov
Cov nkoj siab:Txhawm rau kom muaj cov pa roj thiab cov kua dej ntawm qhov kub siab.
Boilers & Kub Exchangers:Hauv cov chaw tsim hluav taws xob thiab cov chaw petrochemical rau kev hloov pauv hluav taws xob zoo.
Roj & Roj Kev Lag Luam:Nyob rau hauv refineries, offshore rigs, thiab pipelines rau qaub kev pab cuam (sulfide stress cracking) kuj.
Cia Tank:Rau khaws cia siab -kub kua thiab roj.
Khoom siv:Pom nyob rau hauv ntau yam hnyav - lub luag haujlwm tsim kho thiab cov khoom siv ua haujlwm.
Qhov zoo
Lub Zog Kub Kub:Khaws lub zog tensile ntawm qhov kub thiab txias.
Corrosion & Oxidation Resistance:Ntxiv chromium thiab molybdenum muab kev ua haujlwm zoo hauv cov tshuaj hnyav thiab acidic ib puag ncig.
Weldability:Cov ntsiab lus tsis tshua muaj carbon thiab sib npaug sib npaug tso cai rau kev vuam yooj yim yam tsis muaj kev tawg.
Durability & Ntev:Resistant abrasion, corrosion, thiab kev ntxhov siab, ua rau lub neej ua haujlwm ntev thiab kev saib xyuas qis dua.
Tus nqi -zoo:Ntev - txuag lub sij hawm vim txo kev saib xyuas thiab ncua kev pab cuam lub neej feem ntau tshaj tus nqi khoom pib.
Versatility:Haum rau ntau daim ntawv thov uas xav tau lub zog, tiv thaiv tshav kub, thiab tiv thaiv corrosion.
Yog xav paub ntxiv txog GNEE cov khoom siv hlau, tiv tauj peb ntawm beam@gneesteelgroup.com. Peb tos ntsoov yuav ua haujlwm nrog koj.
Puas yog SA 387 Qib 5 Chav Kawm 1 xav tau preheating ua ntej vuam?
Preheating feem ntau pom zoo, tshwj xeeb tshaj yog rau cov phaj tuab lossis hauv qhov chaw txias, kom txo tau qhov kev pheej hmoo ntawm hydrogen-induced cracking thiab xyuas kom meej suab welds.
Cov ncej dab tsi -weld kev kho cua sov feem ntau yog siv rau SA 387 Qib 5 Chav Kawm 1?
Kev ntxhov siab rau kev kho cua sov feem ntau yog siv tom qab vuam los txo cov kev ntxhov siab seem thiab txhim kho cov khoom toughness thiab seem stability.
Dab tsi yog kev lag luam feem ntau siv SA 387 Qib 5 Chav Kawm 1?
Nws yog dav siv nyob rau hauv cov roj thiab roj, petrochemical, chemical processing, thiab fais fab kev lag luam.
Yam khoom siv twg feem ntau yog tsim los ntawm SA 387 Qib 5 Chav Kawm 1?
Cov ntawv thov ib txwm muaj xws li cov hlab ntsha siab, lub rhaub dej, cov khoom siv hluav taws xob, thiab lwm yam siab - muaj cov khoom siv.
Qhov ntsuas kub npaum li cas yog SA 387 Qib 5 Chav Kawm 1 feem ntau siv?
Nws yog tsim los rau kev pabcuam ntawm qhov nruab nrab mus rau qhov kub siab, qhov twg ob qho tib si siab thiab kub qhov chaw xav tau tseem ceeb ntawm cov khoom siv.
SA 387 Qib 5 Chav Kawm 1 piv rau lwm qib hauv SA 387 li cas?
Piv nrog rau siab dua - qib zog hauv SA 387 series, Qib 5 muaj lub zog nruab nrab nrog cov tawv tawv zoo thiab weldability, ua rau nws haum rau cov kev pabcuam hnyav dua.
Dab tsi yog cov tshuaj muaj pes tsawg leeg tsom ntawm SA 387 Qib 5 Chav Kawm 1?
Nws muaj pes tsawg leeg yog sib npaug nrog cov pa roj carbon thiab manganese cov ntsiab lus los muab lub zog thiab toughness, thaum txwv impurities los xyuas kom meej weldability zoo thiab tsis kam rau brittle puas.
Qhov kev xeem twg yog feem ntau ua ntawm SA 387 Qib 5 Chav Kawm 1 daim phiaj?
Cov kev ntsuam xyuas feem ntau suav nrog kev sim tensile, kev sim cuam tshuam (xws li Charpy V-notch), khoov, thiab kuaj ultrasonic kom ntseeg tau tias cov khoom zoo thiab kev ua haujlwm zoo.
Dab tsi yog qhov tseem ceeb ntawm qhov tsis sib haum xeeb hauv SA 387 Qib 5 Chav Kawm 1?
Notch toughness yog ib qho tseem ceeb vim hais tias nws pab cov khoom tiv thaiv nkig tawg, uas yog ib qho tseem ceeb nyob rau hauv lub siab cov hlab ntsha uas tam sim ntawd tsis ua hauj lwm yuav ua rau loj txim.
Dab tsi yuav tsum xav txog thaum xaiv SA 387 Qib 5 Chav Kawm 1 rau ib qhov project?
Cov kev txiav txim siab tseem ceeb suav nrog kev ua haujlwm kub thiab siab, tuab ntawm daim hlau, cov txheej txheem vuam, yuav tsum tau muaj zog, thiab ib qho kev cai tshwj xeeb lossis kev yuav khoom rau kev kho cua sov thiab kuaj.