P22 cov khoom siv tshuaj lom neeg yog dab tsi
Jan 06, 2026
A335 P22 alloy steel yeeb nkab yog chromium-molybdenum siab-kub ferritic alloy steel yeeb nkab hauv ASTM A335 tus qauv, sib haum rau 12Cr2MoG cov khoom hauv Suav teb tus qauv GB5310. Nws cov tshuaj muaj pes tsawg leeg muaj 2.25% chromium thiab 1% molybdenum. Cov yeeb nkab no tau tsim tshwj xeeb rau kev kub siab - kub thiab siab - qhov chaw siab, nrog rau kev ua haujlwm kub txog li 580℃thiab lub siab ntau dua lossis sib npaug li 9.8 MPa. Nws yog dav siv nyob rau hauv fais fab nroj tsuag boilers, superheaters thiab chav pipelines nyob rau hauv lub petrochemical kev lag luam, thiab siab - siab piping systems nyob rau hauv nuclear fais fab nroj tsuag.
Cov tshuaj muaj pes tsawg leeg ntawm P22 alloy yeeb nkab feem ntau suav nrog chromium (Cr), molybdenum (Mo), hlau (Fe), carbon (C), manganese (Mn), sulfur (S), thiab phosphorus (P). Cov proportions ntawm cov tshuaj no txiav txim qhov kev ua tau zoo thiab kev siv ntawm cov yeeb nkab alloy.
- Chromium yog ib qho ntawm cov ntsiab lus tseem ceeb hauv P22 alloy yeeb nkab, nrog cov ntsiab lus ntau dua 2%. Chromium txhim kho oxidation thiab corrosion kuj ntawm cov yeeb nkab alloy, muab nws zoo corrosion kuj nyob rau hauv kub thiab siab kub.
- Molybdenum yog lwm qhov tseem ceeb alloying, feem ntau yog li ntawm 0.45% mus rau 0.65%. Molybdenum txhim kho qhov kub corrosion kuj ntawm cov yeeb nkab alloy, tso cai rau nws ua haujlwm ruaj khov rau lub sijhawm ntev hauv qhov kub thiab txias.
- Dhau li ntawm chromium thiab molybdenum, P22 alloy yeeb nkab kuj muaj hlau, carbon, thiab manganese, uas yog cov khoom tseem ceeb ntawm cov yeeb nkab alloy. Hlau yog lub hauv paus hlau, carbon yog ib qho ntxiv zog, thiab manganese yog siv los kho cov khoom siv ntawm cov yeeb nkab alloy.
- Tsis tas li ntawd, P22 alloy yeeb nkab kuj muaj me me ntawm sulfur thiab phosphorus. Cov ntsiab lus ntawm cov sulfur feem ntau tsis ntau tshaj 0.045%, vim tias cov ntsiab lus sulfur ntau dhau tuaj yeem cuam tshuam rau kev ua haujlwm txias ntawm cov yeeb nkab alloy. Cov ntsiab lus phosphorus feem ntau tsis ntau tshaj 0.040%, vim tias cov ntsiab lus phosphorus ntau dhau tuaj yeem txo qhov toughness thiab lub zog ntawm cov yeeb nkab alloy.
A335 P22 boiler raj Hoobkas
