ASME SA 387 Qib 12 Chav Kawm 2yog chromium-molybdenum (Cr-}Mo) low alloy steel phaj, standardized rau siab -kub siab cov hlab ntsha thiab boilers, muab zoo heev corrosion / oxidation kuj vim nws cov ntsiab lus chromium, nrog rau zoo weldability thiab lub zog, nrog "Class 2" qhia siab tensile/yield zog yuav tsum tau ntau tshaj li cov roj vital, feem ntau cov ntaub ntawv siv roj. muab cov normalized thiab tempered (N + T) rau kev ua tau zoo.
SA 387 Gr.12 Phaj Nqe ib kg
| Min (Tus nqi hauv INR) | Max (Tus nqi hauv INR) |
|---|---|
| 130 | 185 |
SA 387 Gr 12 Cov khoom sib npaug
| Lub teb chaws | Teb chaws USA | Teb chaws Europe | Lub teb chaws Yelemees | ENGLAND | FRANCE | RUSSIA |
| STANDARDS | ASME | TS EN 10028 | DIN | BS | TIAB SA 36206 | GOST |
| Qib 12 | SIB 387 | 13CrMo4-5 | 13 CrMo44 | 620B | 15 CD2.05 Nws | 12 KWM |
SA 387 Gr 12 Cl 2 Chemical Composition
| Qib | C | Mn | P | S | Si | Cr | Mo | V |
| TIAB SA 387 Gr.12 | 0.05 - 0.17 | 0.40 - 0.65 | 0.025 | 0.025 | 0.15 - 0.40 | 1.00 - 1.50 | 0.45 - 0.60 | - |
ASME SA387 Gr 12 CL.2 Alloy Steel Phaj Mechanical Properties
| Chav kawm | Tensile (MPa) | Tawm tswv yim (MPa) | Elong. (50 hli) | Elong. (200 hli) | Reduc'n ntawm Cheeb Tsam * |
| Chav kawm 2 | 450 - 585 | 275 nqi | 22% min | 19% min | - |
Daim ntawv thov rau SA387 Gr.12 Chav Kawm 2 Alloy Steel Phaj
Weldable Pressure Vessels thiab Industrial Boilers.
Sour Service Ib puag ncig
Ntau daim ntawv thov
Kev siv roj av
Cov txiaj ntsig ntawm SA 387 Qib 12 Chav Kawm 2 Hlau Phaj
High Strength & Efficiency
Kev ua haujlwm siab
Lub Neej Ntev Ntev
Flawless tiav
Durable
Corrosion Resistant Lub Cev
Kub kub Resistant Lub Cev
Weldability zoo
Txheej txheem txheej txheem Flow
1. Kev npaj khoom
Kev xaiv cov khoom siv: Ua tiav cov hlau hlau hlau ua raws li ASME SA 387 Qib 12 Chav Kawm 2 (Cr 1.00–1.50%, Mo 0.44–0.69%), nrog rau cov ntawv pov thawj zeb siv tau.
Kev tshuaj xyuas: Txheeb xyuas cov tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom siv kho tshuab (xws li, lub zog tensile, lub zog tawm los, kev cuam tshuam toughness) tiv thaiv cov txheej txheem.
2.Kev txiav & sib sau
Txiav: Raws li kev tsim cov duab kos, txiav daim hlau rau hauv cov duab uas yuav tsum tau ua (phaj, plhaub, taub hau, thiab lwm yam) siv cov plasma, nplaim taws, lossis txoj kev sawing.
Kev Tsim: Tsim cov phaj tiaj tiaj rau hauv lub tog raj kheej lossis cov ntu nkhaus siv dov lossis hydraulic presses, kom ntseeg tau siab precision thiab tsis txhob muaj kev ntxhov siab.
3. vuam
Groove Preparation: Precision machining ntawm V-groove lossis U-groove rau pob qij txha.
Vuam txheej txheem: Siv TIG, MIG/MAG, los yog SAW (Submerged Arc Vuam) nrog cov hlau muab tub lim sib piv cov khoom siv hauv paus (xws li AWS A5.5 E9018-B3).
Interpass Control: nruj me ntsis tswj weld hlaws kub thiab interpass kub.
4. Kev kho cua sov
Tom qab Weld Thaum tshav kub kub kho (PWHT): Ib kauj ruam tseem ceeb uas cov khoom siv welded tau rhuab mus rau qhov kub thiab txias (feem ntau yog 600-700 degree), tuav rau lub sijhawm ua ntej, thiab tom qab ntawd maj mam txias kom txo tau qhov seem vuam kev nyuaj siab thiab txhim kho microstructure.
Normalizing: Siv rau qee yam ntaub ntawv los yog welds los kho cov qauv nplej.
5.Machining
Ua lub ntsej muag, chamfering, thiab lwm yam kev ua tiav kom ntseeg tau tias kev sib dhos raug.
6.Kev soj ntsuam & kuaj
Kev Ntsuas Tsis Zoo (NDT): Ua Kev Ntsuas Radiographic (RT) thiab Kev Ntsuas Ultrasonic (UT) ntawm welds txhawm rau txheeb xyuas qhov tsis xws luag hauv qhov chaw.• Kev Tshuaj Xyuas Nto: Siv Magnetic Particle Testing (MT) lossis Penetrant Testing (PT) txhawm rau xyuas qhov tawg ntawm qhov chaw. Pneumatic Testing: Ua kev ntsuas siab ntawm cov hlab ntsha kom paub tseeb tias kev ncaj ncees.
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 SA 387 GR 12 Cl 2 cov khoom sib npaug?
Cov ntaub ntawv sib npaug ntawm Sa 387 Gr 12 yog BS 620B, UNS K11757, A387 / SA 387, DIN 13 CRMO 44, thiab EN 3 CRMO 45.
Qib 12 steel yog dab tsi?
Xa lus nug. Engineered rau siv nyob rau hauv siab kub kev pab cuam, yog ib tug chrome molybdenum carbon alloy hlau rau siv nyob rau hauv weldable siab hlab ntsha thiab muaj boilers.
Kev tswj hwm thiab kev tshuaj xyuas zoo li cas rau SA 387 Qib 12 Chav Kawm 2?
Cov kev qhia tshwj xeeb yuav tsum tau: Kev tshuaj xyuas cov tshuaj muaj pes tsawg leeg (spectroscopic lossis cov tshuaj ntub dej), kev ntsuas khoom siv tshuab (tensile, cuam tshuam, hardness), kev tshuaj xyuas ultrasonic (ib ASME Tshooj V, Tshooj 4) rau kev puas tsuaj sab hauv, kev tshuaj xyuas qhov zoo ntawm qhov chaw, thiab kev kho cua sov kom paub tseeb tias ua raws li qhov xav tau ntawm qhov kub thiab txias.
SA 387 Qib 12 Chav Kawm 2 puas tuaj yeem siv rau hauv ib puag ncig corrosive?
Nws muaj nruab nrab corrosion kuj vim nws Cr-Mo cov ntsiab lus, haum rau me me corrosive ib puag ncig (xws li, chav, nkev). Txawm li cas los xij, nws tsis pom zoo rau cov xov xwm corrosive heev (piv txwv li, acids, dej ntsev) yam tsis muaj kev tiv thaiv ntxiv (xws li txheej los yog cladding). Rau cov kev pabcuam corrosive, cov qib alloyed siab dua (piv txwv li, SA 387 Qib 22 lossis 91) yuav nyiam dua.
Dab tsi yog qhov sib npaug thoob ntiaj teb tus qauv rau SA 387 Qib 12 Chav Kawm 2?
Cov qauv sib npaug muaj xws li: EN 10028-2: P235GH (zoo ib yam tab sis tsis zoo ib yam), GB / T 19189: 12Cr1MoVg (Suav tus qauv, kaw Cr-Mo muaj pes tsawg leeg), thiab JIS G 3103: STBA 12 (Japanese steel phaj).
Dab tsi yog qhov ceev ntawm SA 387 Qib 12 Chav Kawm 2?
Qhov ceev yog kwv yees li 7.85 g / cm³ (0.284 lb / in³), zoo ib yam li feem ntau qis - alloy steels. Tus nqi no yog siv rau kev xam qhov hnyav hauv cov qauv thiab cov khoom siv.
Puas yog SA 387 Qib 12 Chav Kawm 2 xav tau PWHT tom qab vuam?
Yog lawm, PWHT yog qhov yuav tsum tau ua rau feem ntau daim ntawv thov. Qhov pom zoo PWHT kub yog 620-675℃(1150-1250℃F), nrog lub sij hawm tuav raws li phaj thickness (feem ntau 1 teev ib 25 hli thickness). PWHT txo qhov seem welding stresses, txhim kho ductility, thiab txo qhov kev pheej hmoo ntawm hydrogen-induced cracking.
Dab tsi yog qhov txawv ntawm ASME SA 387 thiab ASTM A 387?
ASME SA 387 thiab ASTM A 387 yog technically zoo tib yam nyob rau hauv cov nqe lus ntawm tshuaj muaj pes tsawg leeg thiab txhua yam khoom. Qhov txawv tsuas yog lawv daim ntawv thov: ASME SA 387 yog ib feem ntawm ASME Boiler thiab Pressure Vessel Code (BPVC), siv rau cov khoom siv tau ntawv pov thawj rau ASME cov qauv. ASTM A 387 yog ib qho dav dav - lub hom phiaj tus qauv rau cov ntawv thov kev lag luam tsis xav tau ASME ntawv pov thawj. Cov neeg tsim khoom feem ntau tsim cov khoom siv uas ua tau raws li ob qho tib si qauv.
Yuav tsum tau kho cua sov dab tsi rau SA 387 Qib 12 Chav Kawm 2?
Qhov yuav tsum tau kho cua sov rau SA 387 Qib 12 Chav Kawm 2 yog normalizing thiab tempering. Normalization yog ua ntawm qhov kub ntawm 890-940℃(1635-1725℃F), tom qab ntawd cua txias. Tempering yog ua nyob rau ntawm qhov tsawg kawg nkaus kub ntawm 620℃(1150℃F), nrog rau lub sij hawm tuav txaus los xyuas kom meej qhov kub thiab txias thoob plaws hauv lub phaj, ces txias hauv huab cua los yog dej.