SA258 Qib C yog dab tsi?
SA258 Qib Cyog cov pa roj carbon steel phaj specification raws li ASME Boiler thiab Pressure Vessel Code (Section II, Part A). Nws yog tsim los rau nruab nrab siab kub kev pab cuam, tshwj xeeb tshaj yog nyob rau hauv cov kev siv xws li cov khoom cua sov thiab tej yam boiler Cheebtsam.
Cov yam ntxwv tseem ceeb:
Khoom siv: Plain carbon steel (tsis muaj cov ntsiab lus tseem ceeb alloying).
Daim Ntawv Thov Tseem Ceeb: Keeb kwm siv rau fireboxes, furnace supports, superheater support, and similar components in boilers and heaters where temperatures highs but not extreme.
Kev Pabcuam Kub: Feem ntau haum rau kev pabcuam txog li 800℃F (427 degree). Nws tsis yog tsim los rau qhov hnyav siab -kub creep kev pab cuam lossis qis-kub/cryogenic applications.
Mechanical Properties (Piv txwv rau daim hlau Tsawg dua lossis sib npaug li 0.5 hauv / 12.5 hli):
Tensile zog: 55 - 75 ksi (380 - 515 MPa)
Yield zog (Min): 30 ksi (205 MPa)
Elongation (Min): 23% (ntev)
Chemical Composition (Tswj):
Cov pa roj carbon (C): 0.20%
Manganese (Mn): 0.40–0.80%
Silicon (Si): 0.10-0.30%
Phosphorus & Sulfur: Tsawg txwv (piv txwv li, P max 0.035%, S max 0.035%)
Cov ntsiab lus tseem ceeb:
Kev siv niaj hnub: SA258 yog cov khoom qub qub thiab tsis tshua muaj cov khoom siv niaj hnub no. Rau cov ntawv thov zoo sib xws, cov neeg tsim qauv niaj hnub no feem ntau siv tau yooj yim dua los yog ua tau zoo- cov hlau tshwj xeeb xws li SA515, SA516, lossis SA204.
Tsis yog rau Cov Plhaub Siab Tseem Ceeb: Feem ntau nws tsis yog thawj qhov kev xaiv rau lub siab tseem ceeb - khaws cov plhaub hauv kev tsim kho tshiab. Nws lub luag haujlwm ib txwm yog rau kev txhawb nqa sab hauv thiab cov qauv hauv siab - qhov kub thiab txias.
Tsis tas yuav tsum muaj zog: Kev ntsuam xyuas cuam tshuam tsis yog qhov yuav tsum tau muaj ntawm lub hauv paus specification tshwj tsis yog ntxiv los ntawm tus neeg yuav khoom.
Cov ntsiab lus:
SA258 Qib C yog cov cuab yeej cuab tam cov pa roj carbon steel phaj rau nruab nrab - qhov kub thiab txias cov khoom siv hauv cov khoom siv cua sov. Thaum tseem codified, nws tau loj hlob los ntawm lwm cov txheej txheem siab lub nkoj steels hauv kev tsim thiab kev yuav khoom.
Tshuaj muaj pes tsawg leeg ntawm cov khoom tsom xam rau SA285 Qib C siab nkoj steel phaj (Max%)
|
Qib Steel |
Cov tshuaj tseem ceeb ntawm A285 Qib C |
||||
|
C |
Si |
Mn |
P |
S |
|
|
A285 Qib C |
0.28 |
0.08-0.45 |
0.98 |
0.035 |
0.035 |
Tensile Requirements
| SA 285 Gr A Ksi (MPa) |
SA 285 IB Gr Ksi (MPa) |
SA 285 Gr C Ksi (MPa) |
|
|---|---|---|---|
| Tensile zog | 45-65 (310-450) | 50-70 (345-485) | 55-75 (380-515) |
| Yield zog, min | 24 (165) | 27 (185) | 30 (205) |
| Elongation hauv 8in. lossis (200Â mm), min, % | 27 | 25 | 23 |
| Elongation nyob rau hauv 2Â in. los yog (50Â mm), min, % | 30 | 28 | 27 |
SA258 Qib C yog dab tsi?
Teb: SA258 Qib C yog cov pa roj carbon steel phaj tshwj xeeb rau cov hlab ntsha siab, feem ntau yog siv rau hauv kev siv cua sov xws li fireboxes thiab superheater txhawb, tsim los rau nruab nrab siab kub kev pab cuam.
Cov tshuaj muaj pes tsawg leeg ntawm SA258 Qib C yog dab tsi?
Teb: Nws muaj pes tsawg leeg feem ntau yog carbon steel nrog tswj qib carbon (max 0.20%), Manganese (0.40-0.80%), Silicon (0.10-0.30%), thiab txwv Phosphorus thiab Sulfur.
Dab tsi yog cov khoom siv kho tshuab ntawm SA258 Qib C?
Teb: Rau cov phaj siab txog li 0.5 ntiv tes tuab, nws muaj lub zog tensile yam tsawg kawg nkaus ntawm 55-75 ksi (380-515 MPa) thiab qhov tsawg kawg nkaus yield zog ntawm 30 ksi (205 MPa).
Puas yog SA258 Qib C yog carbon steel lossis hlau alloy?
Teb: SA258 Qib C yog cais raws li cov pa roj carbon steel, vim tias nws tsis muaj qhov xav tau ntxiv ntawm cov hlau alloying xws li chromium lossis molybdenum.
Dab tsi yog thawj daim ntawv thov ntawm SA258 Qib C?
Teb: Nws txoj kev siv tseem ceeb yog nyob rau hauv kev tsim cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab cov khoom siv zoo sib xws hauv cov boilers thiab cov cua sov uas qhov kub thiab txias tau nce siab, tab sis oxidation kuj tseem ceeb dua.
Qhov kev pabcuam siab tshaj plaws rau SA258 Qib C yog dab tsi?
Teb: Nws feem ntau yog siv rau kev pabcuam kub txog li 800℃F (427 degree), feem ntau hauv cov ntawv tsis yog-corrosive, qis- kev txhawb nqa kev ntxhov siab.
SA258 Qib C txawv ntawm SA258 Qib A thiab B li cas?
Teb: Cov qib sib txawv feem ntau nyob rau hauv lub zog. Qib C muaj zog tensile ntau dua (55-75 ksi) piv rau Qib A (47-67 ksi) thiab Qib B (50-70 ksi), nrog me ntsis kev hloov pauv hauv chemistry.
SA258 Qib C puas tuaj yeem welded?
Teb: Yog, nws muaj qhov zoo weldability zoo ib yam ntawm qis - carbon steels. Cov txheej txheem vuam txheej txheem rau carbon steel feem ntau yog siv.
Puas yog SA258 Qib C xav tau kev sim cuam tshuam?
Teb: Kev ntsuam xyuas qhov cuam tshuam tsis yog qhov yuav tsum tau ua ntawm lub hauv paus specification tab sis tuaj yeem teev raws li qhov xav tau ntxiv los ntawm tus neeg yuav khoom yog tias xav tau rau daim ntawv thov.
Puas yog SA258 Qib C haum rau cov hlab ntsha siab?
Teb: Thaum nws yog lub siab lub nkoj zoo phaj, nws cov kev siv feem ntau yog tshwj xeeb tshaj yog rau cov qauv kev txhawb nqa sab hauv hauv siab - qhov kub thiab txias es tsis yog thawj lub siab - khaws cov plhaub hauv kev tsim kho niaj hnub no.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
