ASTM A387 / ASME SA387 Qib 22 Chav Kawm 2: Cov Lus Qhia Tseem Ceeb rau Siab -Tsuas Kub Siab Vessel Steel
ASTM A387 / ASME SA387 Qib 22 Chav Kawm 2yog tus hwm 2.25% Cr–1.0% Mo alloy steel phaj tsim los rau siab - kub thiab siab - kev pabcuam siab hauv boilers thiab cov hlab ntsha siab. Raws li qib siab dua -lub zog ntawm A387 Gr.22, nws muaj cov yam ntxwv zoo heev ntawm kev nkag mus, oxidation thiab corrosion kuj, nrog rau cov weldability zoo piv rau Chav Kawm 1. Nws yog dav siv thoob plaws ntiaj teb cov roj & roj, petrochemical thiab hluav taws xob tsim kev lag luam rau cov khoom tseem ceeb ua haujlwm ntawm qhov siab tshaj plaws kev pabcuam kub txog 600℃(1112℃F). Phau ntawv qhia no suav nrog cov lus qhia tshwj xeeb, cov khoom siv kho tshuab & tshuaj lom neeg, hla- cov qauv sib npaug, cov ntawv thov raug thiab cov txheej txheem tsim khoom raws li ASTM thiab ASME cov qauv.
1. Cov Txheej Txheem Txheej Txheem & Cov Ntsiab Lus Txhais
1.1 Cov Cai Tswjfwm
ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387) thiab ASTM A387: Txheem Specification rau Chromium-Molybdenum Alloy Steel Phaj rau Cov Nkoj Siab.
ASME SA387 / SA387M: Sib npaug tus qauv raws li ASME Boiler thiab Pressure Vessel Code (BPVC), tag nrho sib hloov nrog ASTM A387 rau kev siv tshuab.
UNS Number: K21590 (Kev txheeb xyuas cov khoom siv thoob ntiaj teb rau kev taug qab thoob ntiaj teb).
1.2 Qib & Chav Kawm Distinction
Qib 22: Qhia meej cov tshuaj nominal muaj pes tsawg leeg ntawm 2.25% Chromium thiab 1.0% Molybdenum, xa cov kev ua tau zoo siab - kub dua li Qib 11 (1.25% Cr, 0.5% Mo).
Chav kawm 2: Yuav tsum tau uaNormalized thiab Tempered (N&T)Kev kho cua sov, muab lub zog tensile thiab tawm los ntau dua li Chav Kawm 1 (tsis tas yuav tsum tau N&T).
ASME P-Number: P5 (txhais tau nyob rau hauv ASME Tshooj IX rau vuam txheej txheem tsim nyog ntawm Cr-Mo steels).
2. Chemical Composition (Qhov hnyav %)
Kev tswj tshuaj nruj nruj kom ruaj khov ua haujlwm ntawm qhov kub thiab txias. Cov nqi hauv qab no siv rauheat analysis (dawb qauv)thiabKev txheeb xyuas cov khoom (cov phaj tiav).
| Lub ntsiab | Cov pa roj carbon (C) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulfur (S) | Chromium (Cr) | Molybdenum (hli) |
|---|---|---|---|---|---|---|---|
| Min | 0.05 / 0.04 | 0.30 / 0.25 | - | - | - | 2.00 / 1.88 | 0.90 / 0.85 |
| Max | 0.15 | 0.60 / 0.66 | 0.50 | 0.035 | 0.035 | 2.50 / 2.62 | 1.10 / 1.15 |
Carbon Equivalent Formula: Ceq=C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15
Lub luag haujlwm tseem ceeb ntawm Alloy Elements:
Chromium (2.00–2.50%): Cov ntaub ntawv tuab tiv thaiv oxide zaj duab xis los txhim kho oxidation tsis kam thiab corrosion kuj, haum rau cov roj qaub thiab siab - qhov chaw ua haujlwm kub.
Molybdenum (0.90–1.10%): Ua kom muaj zog nkag tau zoo thiab tiv thaiv hydrogen nres ntawm 400–600 degree, zam kev ua tsis tiav ntxov nyob rau lub sijhawm ntev - kub thiab siab.
3. Mechanical Properties (chaw kub)
Tag nrho cov kev ntsuam xyuas tshuab yog ua raws li ASTM A370. Kev sib piv ntawm Chav Kawm 2 thiab Chav Kawm 1 yog teev hauv qab no rau kev siv.
| Khoom | Chav tsev | Chav kawm 2 | Chav Kawm 1 (Reference) |
|---|---|---|---|
| Tensile zog | MPa (ksi) | 515–690 (75–100) | 415–585 (60–85) |
| Yam tsawg kawg nkaus Yield Strength (0.2% Offset) | MPa (ksi) | 310 (45) | 205 (30) |
| Elongation (50 hli Gauge Length) | % | Ntau dua lossis sib npaug li 18 | Ntau dua lossis sib npaug li 18 |
| Kev txo qis ntawm cheeb tsam (Round Specimen) | % | Ntau dua lossis sib npaug li 45 | Ntau dua lossis sib npaug li 40 |
| Hom Brinell Hardness (HB) | - | 130–170 | 140–200 |
Yuav tsum tau kho cua sov: Normalized ntawm 890-950℃(cua txias), ces Tempered ntawm 650-720℃(cua txias). Cov txheej txheem no sib npaug mechanical zog thiab cov khoom toughness.
Impact Test: Charpy V-Notch (CVN) cuam tshuam kev xeem yog yuav tsum tau ntawm-52 degreetxhawm rau txheeb xyuas qhov qis -kub toughness.
4. Cov qib sib npaug thoob ntiaj teb
Hauv qab no yog cov qhab nia sib npaug thoob ntiaj teb nrog cov tshuaj lom neeg sib xyaw thiab cov khoom siv kho tshuab rau kev hloov pauv engineering.
| Standard System | Qib sib npaug | Thaj tsam |
|---|---|---|
| TS EN 10028-2 / DIN 17155 | 10CrMo9-10 (1.7380) | Teb chaws Europe, lub teb chaws Yelemees |
| SIB 622 | 622-515B | United Kingdom |
| JIS G3103 | SCMV 4 | Nyiv |
| GB/T 713 | 12Cr2Mo1R | Tuam Tshoj |
| AFNOR | 10 CD9-10 | Fabkis |
| GOST | 10 KH2M | Russia |
| SS Txuj | TIAB SA 2218 | Sweden |
Lus ceeb toom tseem ceeb: Thaum hloov cov ntaub ntawv, nco ntsoov paub meej tias cov khoom tau muab rau hauvClass 2 (N&T) mob. Feem ntau cov qib sib npaug tsuas yog muab cov khoom siv hauv chav kawm 1 nrog cov khoom siv hluav taws xob qis dua.
5. Cov txiaj ntsig tseem ceeb & Kev ua haujlwm zoo
Siab -Temperature Creep Resistance: Ua kom muaj kev ruaj ntseg nyob rau hauv ntev -lub sij hawm kub thiab siab, siab tshaj plaws kev khiav hauj lwm kub mus txog 600℃.
Zoo heev Oxidation & Corrosion Resistance: Resistant scaling and corrosion in high -kub chav, hydrogen nruab nrab thiab qaub roj ib puag ncig.
Txhim khu Weldability: Tau tshaj - cov txheej txheem hydrogen welding. Preheat preheat thiab post-weld heat treatment tuaj yeem tiv thaiv cov kab nrib pleb txias.
Siab zog - rau - Qhov hnyav piv: Lub zog muaj zog ntau dua tso cai rau cov phaj nyias nyias tsim rau cov hlab ntsha siab, txuag cov khoom siv thiab cov khoom hnyav tag nrho.
6. Cov ntawv thov kev lag luam
No Cr-Mo alloy steel phaj feem ntau yog siv rau qhov tseem ceeb ntawm - kub thiab siab - cov khoom siv siab:
Petrochemical & Refinery: Hydrocracking reactors, catalytic reformers, kub separators, coke nruas, hydrogen kev pab cuam siab hlab ntsha.
Lub zog tiam: Boiler nruas, superheater headers, industrial tshav kub exchangers.
Roj & Roj: Onshore & offshore siab -cov twj tso kua mis, LPG cia tank, qaub cov kav dej.
Kev lag luam tshuaj: Ammonia converters, sulfur rov qab units, siab -kub kub exchangers.
7. Khoom Specifications & Kev Tswj Xyuas Zoo
7.1 Dimension Range
Thickness: 6mm-300mm
Dav: 1000mm - 4500mm
Ntev: 3000mm - 18000mm
Yam khoom: Kub Rolled (HR) steel daim hlau, customized txiav daim
7.2 Kev Ua Haujlwm Zoo & Kev Xeem
Kev Ntsuas Ultrasonic (UT): Tshawb xyuas ib qho ASTM A435 / A578 kom tshem tawm cov teeb meem sab hauv.
Tsawg-kub Impact Test: Charpy V-Qhov ntsuas ntsuas ntawm -52℃.
Thib peb-Party Certification: Muaj nrog SGS, TUV, BV, Lloyd's Register certification for global project approval.
8. Vuam & Fabrication Guidelines
Ua raws li cov cai hauv qab no kom tsis txhob muaj cov khoom tawg thiab ua raws li ASME BPVC cov lej:
Preheat kubKub: 150-250 degree. Siab dua preheat yog xav tau rau daim hlau tshaj 25mm nyob rau hauv thickness.
Vuam Filler Hlau: AWS E8018-B2 for SMAW; EB3 / FB3 rau SAW, txuam Cr-Mo tshuaj muaj pes tsawg leeg.
Tshaj tawm -Kev kho cua sov (PWHT): Tuav ntawm 680-710℃, 1 teev ib 25mm phaj thickness (tsawg kawg tuav lub sij hawm: 2 teev) rau residual stress nyem.
Thermal Txiav: Laser txiav los yog plasma txiav nrog 150-200℃preheat los tiv thaiv ntug tawg.
9. Cov lus nug nquag nug (FAQ)
Q1: Dab tsi yog qhov siab tshaj qhov kev pabcuam kub rau A387 Gr.22 Cl.2?
A: Qhov kub siab tshaj plaws mus txog 600℃(1112℃F). Rau kev ua haujlwm ntev - lub sijhawm muaj kev nyab xeeb, qhov kev pabcuam txuas ntxiv tau pom zoo kom tsis pub tshaj 550℃.
A: Lawv tuaj yeem hloov pauv tau rau feem ntau ntawm kev ua haujlwm. A387 Gr.22 Cl.2 muaj ntau dua chromium thiab molybdenum cov ntsiab lus, xa tau zoo dua - kub ua haujlwm.
Q3: Puas yog A387 Gr.22 Cl.2 zoo ib yam rau 10CrMo9-10?
A: Yog. EN / DIN tus qauv 10CrMo9-10 yog qib ncaj qha sib npaug nrog cov khoom siv tshuaj thiab cov khoom siv kho tshuab.
Xaus
ASTM A387 / ASME SA387 Qib 22 Chav Kawm 2yog qhov ntsuas ntsuas siab -kub siab lub nkoj steel hauv kev lag luam steel thoob ntiaj teb. Kev sib xyaw ua haujlwm zoo heev, oxidation tsis kam thiab ruaj khov weldability, nws ua raws li ASTM thiab ASME thoob ntiaj teb cov qauv. Nrog rau kev lees paub dav dav - cov qib sib npaug, nws tseem yog cov khoom siv zoo tshaj plaws rau cov engineers, fabricators thiab pab pawg neeg yuav khoom rau qhov tseem ceeb siab - kub siab cov cuab yeej siv thoob ntiaj teb.
Rau cov ncauj lus kom ntxaws, Cov Ntawv Qhia Txog Cov Khoom Siv (MTRs) lossis cov kev pabcuam kev cai, thov hu rau cov kws tshaj lij thiab tsim nyog A387 Gr.22 Cl.2 steel cov chaw muag khoom.
