ASTM A336 / A336M Txuj Specification rau Alloy Steel Forgings rau Siab thiab Siab -Qhov Kub
Cov specification no npoghnyav-lub luag haujlwm alloy steel forgingsnpaj raucov khoom siv hauv lub nkoj siab, li qub, flanges, fittings, thiab lwm yam siab -qhov kev ntxhov siabnyob rau hauv siab kub kev pab cuam. Cov forgings yog qhov tseem ceeb hauv kev lag luam xws li kev tsim hluav taws xob, petrochemical, thiab roj & roj rau cov cuab yeej tseem ceeb.
Cov yam ntxwv tseem ceeb
| Feature | Kev piav qhia |
|---|---|
| Daim ntawv khoom | Forgings- zoo li tus los ntawm hammering los yog nias. |
| Khoom siv | Hlau alloy(Chromium{0}}Molybdenum hom). |
| Cov khoom tseem ceeb | Siab zog, toughness, thiab creep resistancentawm qhov kub thiab txias. |
| Kev siv thawj zaug | Cov khoom tseem ceeb hauv cov hlab ntsha siab, cov reactors, thiab siab -cov kav dej kub. |
Cov Qib Siab
ASTM A336 qib raug xaiv nrog ib qho"F"(rau Forging). Cov qhab-nees thiab lawv cov qib sib npaug ntawm cov yeeb nkab / raj:
| Forging Qib (A336) | Cov yeeb nkab zoo sib xws (A335) | Ntsiab Alloy | Daim ntawv thov |
|---|---|---|---|
| F11 | P11 | 1¼Cr-½ Mo | Valve lub cev, fittings rau nruab nrab temp kev pab cuam. |
| F22 | P22 | 2¼Cr-1Mo | Cov hlab ntsha siab, hnyav -flanges flanges, reactor qhov chaw. |
| F5 | P5 | 5Cr-½ Mo | Siab - qhov kub thiab txias tiv thaiv oxidation zoo dua. |
| F9 | P9 | 9Cr-1Mo | Siab - zog, siab - qhov kub thiab txias. |
| F91 | P91 | 9Cr-1Mo-V-Nb | Cov khoom tseem ceeb hauv cov niaj hnub siab -siab/kub nroj tsuag. |
Cov Khoom Siv Tshuaj (Piv txwv: Qib F22)
| Element | Kev sib xyaw (%) |
|---|---|
| Cov pa roj carbon (C) | 0.05 – 0.15 |
| Manganese (Mn) | 0.30 – 0.60 |
| Phosphorus (P), max | 0.025 |
| Sulfur (S), max | 0.025 |
| Silicon (Si) | 0.50 max |
| Chromium (Cr) | 1.90 – 2.60 |
| Molybdenum (hli) | 0.87 – 1.13 |
Mechanical Requirements (Piv txwv: Qib F22, Normalized & Tempered)
| Khoom | Kev xav tau |
|---|---|
| Tensile zog | Ntau dua lossis sib npaug rau 415 MPa (60,000 psi) |
| Yield zog | Ntau dua lossis sib npaug rau 205 MPa (30,000 psi) |
| Elongation (hauv 50mm) | Ntau dua lossis sib npaug li 22% |
| Kev txo qis ntawm cheeb tsam | Ntau dua lossis sib npaug li 45% |
| Charpy V-Qhov cuam tshuam | Feem ntau yuav tsum tau(piv txwv li, min. 20 J ntawm chav tsev kub). |
Manufacturing & Testing
Txheej txheem melting:Lub tshuab hluav taws xob, feem ntau nrog kev ua kom zoo dua qub (piv txwv li, AOD, VOD).
Forging:Rhaub ingot yog mechanically ua hauj lwm los refine grain qauv.
Kev kho cua sov: Yuav tsum tau- feem ntau normalized thiab tempered los yog quenched thiab tempered.
Kev kuaj:Kev sim dav dav suav nrog:
Tshuaj ntsuam xyuas
Tensile xeem
Impact test
Kev tshawb nrhiav hardness
Tsis yog -kev kuaj xyuas kev puas tsuaj (NDE) zoo li kev kuaj ultrasonic (UT) rau cov ntawv thov tseem ceeb.
Tej kev siv
Cov nkoj siab:Plhaub, taub hau, nozzle caj dab, manway flanges.
Valves:Lub rooj vag valve lub cev, lub ntiaj teb li qub, kos li qub rau siab - kev pabcuam kub.
Piping Cheebtsam:Loj-inch, siab-siab flanges (WNRTJ), reducers, tees.
Turbine & Lub Zog:Chav hauv siab, turbine casings, valve hauv siab.
Reactors:Hydroprocessing reactor seem thiab internals.
Cov Lus Cim Tseem Ceeb
Kev kho cua sov yog qhov tseem ceeb:Cov khoom tau ua tiav los ntawm kev tswj cov cua sov, tsis yog chemistry xwb.
NDE Requirements:Feem ntau ntawm kev kuaj ultrasonic (UT) feem ntau teev los ntawm tus neeg yuav khoom ntawm ASME Tshooj VIII lossis lwm cov lej.
Vuam & PWHT:Cov forgings no yog weldable tab sis xav tau cov txheej txheem kom raug thiabYuav tsum Post-Weld Heat Treatment (PWHT).
Tsis yog Pipe Standard:Qhov no yog ibforging txheemrau discrete, hnyav Cheebtsam. Rau cov kav dej txuas ntxiv, sivASTM A335 Cov Lus Qhia Tshwj Xeebseamless yeeb nkab.
Hauv cov ntsiab lus, ASTM A336 txhais tau hais tias siab -kev ncaj ncees alloy steel forgings uas tsim cov caj qaum ntawm qhov tseem ceeb siab - kub, siab - cov cuab yeej siv siab, qhov kev ntseeg siab thiab lub zog nyob rau hauv cov xwm txheej hnyav yog qhov tseem ceeb.
