Dab tsi yog qhov txawv ntawm ASTM A335 P11 thiab P22
Jan 06, 2026
P11 thiab P22 yog ob qhov sib txawv alloy steel yeeb nkab cov ntaub ntawv, feem ntau sib txawv ntawm cov tshuaj muaj pes tsawg leeg, siab -kub tsis kam, thiab daim ntawv thov scenarios. P11 (raws li lub teb chaws tus qauv 15CrMoG) muaj 1% chromium thiab 0.5% molybdenum, thaum P22 (raws li lub teb chaws tus qauv 12Cr2MoG) muaj 2.25% chromium thiab 1% molybdenum. Lub tom kawg muaj superior siab - kub lub zog thiab oxidation tsis kam, ua rau nws haum rau boiler systems nrog ntau dua tsis.
Chemical Composition Qhov txawv
P11: Kwv yees li ntawm 1% chromium thiab 0.5% molybdenum, muaj nyob rau qis- alloy chromium-molybdenum steel.
P22: 2.25% chromium thiab 1% molybdenum, nrog cov ntsiab lus alloying ntau dua, txhim kho thermal zog.
Kev sib piv
Kev txwv kub: P11 qhov ntev - lub sijhawm ua haujlwm kub txwv yog kwv yees li 550 degree, thaum P22 tuaj yeem ncav cuag 580℃.
Oxidation Resistance: Vim nws cov ntsiab lus chromium ntau dua, P22 tsim cov yeeb yaj kiab oxide ruaj khov dua ntawm qhov kub thiab txias. Creep Strength: P22 nthuav tawm kwv yees li 30% siab dua creep zog ntawm 580℃dua P11.
Hauv qab no yog ib daim vis dis aus sib piv kev ua tau zoo ntawm P11 thiab P1+:
Daim ntawv thov Scenario
P11: Feem ntau siv hauv superheaters, reheaters, thiab lwm yam khoom ntawm nruab nrab - thiab siab - siab boilers (siab dua los yog sib npaug rau 9.8 MPa).
P22: Haum rau cov kav dej loj thiab cov taub hau hauv cov chav nyob supercritical (siab tshaj lossis sib npaug ntawm 9.8 MPa).
A335 P11 P22 boiler raj rau muag
