ASTM A691 2-1/4CR yog hais txog qib tshwj xeeb ntawm cov yeeb nkab steel hlau npog raws li tus qauv ASTM A691.Nov yog cov lus piav qhia ntxaws:
ASTM A691 Txuj: Qhov no yog ib qho kev qhia tshwj xeeb rau hluav taws xob- fusion-welded steel kav tsim nyog rau siab - kev pabcuam siab ntawm qhov kub nruab nrab. Cov kav dej feem ntau yog siv rau hauv kev lag luam xws li kev tsim hluav taws xob, kev ua lag luam petrochemical, thiab roj refining, qhov twg siab - yuav tsum muaj kev sib kis ntawm cov kua.
2-1 / 4CR Qib: Qhov kev xaiv "2-1/4CR" qhia cov tshuaj muaj pes tsawg leeg ntawm cov hlau, tshwj xeeb tshaj yog tias nws muaj kwv yees li 2.25% chromium (Cr). Qib no yog ib feem ntawm cov chromium-molybdenum (Cr-Mo) alloy tsev neeg, uas kuj tseem muaj lwm cov ntsiab lus xws li molybdenum (Mo) los txhim kho cov hlau cov khoom.
Cov khoom tseem ceeb:
Siab -Tsub Muaj Zog: Qhov sib ntxiv ntawm chromium thiab molybdenum txhim kho cov hlau lub zog ntawm qhov kub thiab txias, ua rau nws tsim nyog rau cov ntawv thov uas muaj qhov kub siab.
Corrosion Resistance: Chromium txhim khu cov hlau tiv thaiv oxidation thiab corrosion, uas yog qhov zoo nyob rau hauv ib puag ncig hnyav.
Toughness: Cov alloy muaj pes tsawg leeg muab zoo toughness, tso cai rau cov yeeb nkab kom tiv taus txhua yam kev ntxhov siab thiab cuam tshuam.
ASTM A 691 2-1/4CR Pipe Specification
ASTM A691 2-1/4CR Alloy Steel EFW Pipes Class Designation
ASTM A 691 2-1/4CR Plate Khoom
Daim ntawv thov: ASTM A691 2-1/4CR cov kav dej feem ntau siv hauv:
Fais fab nroj tsuag boilers thiab superheaters
Petrochemical cog piping systems
Cov txheej txheem roj refinery
Lwm yam siab -siab, siab -kub kua kis tau tus mob
