SA537 Chav Kawm 2(tseem hu uaASME SA537 Cl 2los yogASTM A537 Cl 2) yog cov cua sov-kho, carbon-manganese-silicon steel phaj tshwj xeeb tsim los rau fusion-welded siab hlab ntsha thiab kev siv cov qauv. Nws yog tus cwj pwm los ntawm cov txiaj ntsig siab dua thiab lub zog tensile piv rau Chav Kawm 1, ua tiav los ntawm aQuenched thiab Tempered (Q & T)Kev kho cua sov txheej txheem.
Standard sib npaug:
| Qib Steel | JIS | Lub teb chaws Yelemees |
| ASTM/ASME | G3115 | DIN17155 |
| A537/SA537 | SPV36 | 19mn 5 |
Chemical Composition:
| C | Mn | P | S | Si | Cr | Cu | Ni | Mo | |
| Tsawg dua los yog sib npaug li 40 mm | >40 mm | ||||||||
| 0.24 max | 0.70/1.35 | 1.00/1.60 | 0.035 | 0.035 | 0.15/0.50 | 0.025 | 0.35 | 0.25 | 0.080 |
Mechanical Properties:
| Qib | Kev kho cua sov | Tensile (MPa) | Tawm tswv yim (MPa) | Elongation |
| SA537 Chav Kawm 2 | Quenched thiab tempered | 550–690 | 415 | 22% |
Core Industrial Applications
Roj & Roj:Siv dav rau cov platforms offshore, cov tso tsheb hlau luam (API 650/620), thiab cov nkoj tshwj xeeb xws li cov kua qaub cais uas yuav tsum tau tswj cov kua dej tsis zoo thiab cov pa roj.
Petrochemicals:Siv nyob rau hauv siab -siab reactors, separators, thiab refinery cov cuab yeej uas ua cov tshuaj phem heev.
Kev tsim hluav taws xob:Ib qho tseem ceeb rau kev tsim kho ntawm high -siab boiler nruas, chav generators, thiab nuclear Cheebtsam (pressurizers).
Kev ua tshuaj lom neeg:Ua haujlwm nyob rau hauv cov khoom siv hluav taws xob, cov khoom siv tshuaj lom neeg, thiab cov hlab ntsha reactor vim nws tsis kam rau thermal stress thiab tshuaj corrosion.
Cov khoom siv tshwj xeeb
| Qeb | Cov Cheebtsam tshwj xeeb |
|---|---|
| Cov nkoj | Fusion-welded siab hlab ntsha, reactor hlab ntsha, plhaub, thiab taub hau. |
| Cia | Cryogenic tso tsheb hlau luam, cov roj cia siab, thiab cov boilers loj loj. |
| Kev sib kis | Siab - cov kav dej siab thiab loj - txoj kab uas hla tshav kub exchangers. |
| Cov qauv tsim | Load-cov qauv kev coj tus kheej rau cov nroj tsuag kev lag luam thiab cov khoom siv sab nrauv. |
Vim li cas thiaj siv tau
Extreme Pressure Service:Nws lub zog tensile siab (txog 690 MPa) tso cai rau cov phab ntsa nyias nyias piv rau cov qib txheem, txo qhov hnyav tag nrho thiab tus nqi.
Kub Versatility:Ua kom muaj kev ncaj ncees ntawm ob qho kev pabcuam kub siab (txog 600 degree) thiab qis -cov ntawv siv kub qhov twg qhov tsis zoo yog qhov tseem ceeb.
Sour Service Performance:Muab tej yam ntuj tso tsis kam mus rau hydrogen-induced cracking (HIC), ua rau nws yog ib qho kev xaiv rau cov kua qaub tank thiab cov separators.
Superior Weldability:Nws muaj pes tsawg leeg tso cai rau fabrication siv cov txheej txheem vuam txheej txheem, uas yog ib qho tseem ceeb rau lub tsev loj heev, leak- pov thawj industrial lug.
SA537CL2 Txais Cov Txheej Txheem
Vuam txheej txheem: Preheat cov khoom siv rau 95-150℃; siv tsawg-hydrogen electrodes (eg, AWS E7018); ua kev kho cua sov tom qab vuam ntawm 595-650℃rau kev ntxhov siab.
Txheej txheem txheej txheem: Txias sib sau rau nyias daim hlau (tsawg dua lossis sib npaug li 65mm); kub sib sau ntawm 200-300℃rau daim hlau tuab kom txo tau txoj kev ntxhov siab thiab tsis txhob deformation.
Kev kho cua sov: Xa hauv quenched thiab tempered (Q + T) xeev; re- tempering muaj yog tias xav tau los tswj cov khoom sib xws.
Txheej txheem machining: Siv carbide/siab-cov cuab yeej steel ceev; tswj qis txiav ceev thiab pub tus nqi; siv coolant los tiv thaiv cov khoom hardening thiab cov cuab yeej hnav.
Kev soj ntsuam & Nto txheej txheem: ASME SA-578 Chav Kawm 1 ultrasonic tshuaj xyuas; txhaj tshuaj / xuab zeb blasting rau derusting (Sa2.5 qib); kuab tshuaj ntxuav kom tshem tawm cov roj / impurities.
Thov kev tshaj lij rau SA537CL2 los ntawm GNEE Steel.
Dab tsi yog qhov cuam tshuam toughness rau SA 537 Chav Kawm 2?
SA 537 Chav Kawm 2 yuav tsum muaj qhov tsawg kawg nkaus Charpy V-notch (CVN) cuam tshuam lub zog ntawm 27 J (20 ft- lb) ntawm -18℃(0℃F). Qhov no ua kom zoo toughness los tiv thaiv brittle puas nyob rau hauv qis-kub los yog dynamic load tej yam kev mob.
Dab tsi yog qhov thickness ntau muaj rau SA 537 Class 2 daim hlau?
SA 537 Class 2 daim hlau feem ntau muaj nyob rau hauv thicknesses ntawm 6 hli mus rau 200 hli (0.25 rau 8 nyob rau hauv). Cov phaj tuab tuaj yeem xav tau kev kho cua sov tshwj xeeb kom ntseeg tau tias cov khoom siv kho tshuab tsis sib xws thoob plaws hauv -section.
Puas yog SA 537 Chav Kawm 2 xav tau tom qab-weld heat treatment (PWHT)?
Yog lawm, PWHT feem ntau xav tau rau SA 537 Chav Kawm 2 tom qab vuam. Nws suav nrog cua sov lub vuam mus rau 593-649℃(1100-1200℃F) thiab tuav rau lub sijhawm tshwj xeeb los txo cov kev ntxhov siab thiab txhim kho weld toughness.
Dab tsi yog qhov hardness txwv rau SA 537 Chav Kawm 2?
Qhov siab tshaj plaws Brinell hardness (HB) rau SA 537 Chav Kawm 2 yog 235. Kev ntsuas hardness yog ua los xyuas qhov ua tau zoo ntawm kev kho cua sov thiab xyuas kom cov khoom tsis muaj brittleness ntau dhau.
SA 537 Chav Kawm 2 puas tuaj yeem siv tau rau hauv cov ntawv thov kub tsawg -?
Yog lawm, SA 537 Chav Kawm 2 tuaj yeem siv rau hauv qis- daim ntawv thov kub mus rau -18℃(0℃F) vim nws qhov cuam tshuam zoo. Rau qhov ntsuas kub qis dua, yuav tsum tau kuaj xyuas qhov cuam tshuam ntxiv thiab cov khoom tsim nyog.
Dab tsi yog austenitizing kub rau SA 537 Chav Kawm 2 thaum kho cua sov?
Qhov kub austenitizing rau SA 537 Chav Kawm 2 feem ntau yog 871-982℃(1600-1800℃F). Cov khoom yog tuav ntawm qhov kub no kom txog rau thaum tag nrho austenitized ua ntej quenching kom ua tau raws li qhov xav tau txhua yam khoom.
Cov txheej txheem vuam zoo li cas rau SA 537 Chav Kawm 2?
Cov txheej txheem vuam tsim nyog rau SA 537 Chav Kawm 2 suav nrog cov hlau thaiv arc vuam (SMAW), roj hlau arc vuam (GMAW), flux-cored arc vuam (FCAW), thiab submerged arc vuam (SAW), nrog rau cov txheej txheem tsis raug.
Dab tsi yog qhov yuav tsum tau elongation rau SA 537 Chav Kawm 2?
SA 537 Chav Kawm 2 yuav tsum muaj qhov tsawg kawg nkaus elongation ntawm 22% hauv 50 hli (2 hauv) ntsuas qhov ntev. Qhov no elongation ua kom cov khoom muaj ductility txaus los deform plastically ua ntej tawg, txhim kho cov qauv kev ntseeg tau.
Puas yog SA 537 Class 2 resistant rau corrosion?
SA 537 Chav Kawm 2 muaj nruab nrab corrosion kuj nyob rau hauv atmospheric thiab me me tshuaj ib puag ncig. Rau cov kev pab cuam corrosive (xws li, acidic lossis salty ib puag ncig), kev tiv thaiv corrosion ntxiv (txheej, cladding) raug pom zoo.
Dab tsi yog qhov tempering kub rau SA 537 Chav Kawm 2?
Tempering kub ntau rau SA 537 Chav Kawm 2 yog 593-704℃(1100-1300℃F). Tempering ntawm qhov no txo qis hardness, txo cov kev ntxhov siab sab hauv, thiab txhim kho toughness thaum tuav lub zog txaus.