Cov yeeb nkab hlau tsis sib xyaw yog cov khoom siv ua tau zoo uas siv dav hauv kev lag luam thiab kev tsim kho. Nws lub ntsiab lus tseem ceeb yog los txhim kho cov khoom siv kho tshuab, kev tiv thaiv corrosion thiab kev tiv thaiv kub ntawm cov yeeb nkab hlau los ntawm kev ntxiv cov khoom sib xyaw sib txawv, xws li chromium, molybdenum, nickel, thiab lwm yam. Cov hauv qab no yog qee cov khoom siv hlau tsis sib xyaw uas sawv cev rau:

ASTM A335P-series:

P5Cov yeeb nkab hlau P5 muaj 5% chromium thiab 0.5% molybdenum, muaj kev tiv thaiv oxidation zoo thiab lub zog kub siab, thiab feem ntau siv rau hauv cov kav dej kub thiab kev lag luam petrochemical.
P9P9 steel yeeb nkab muaj 9% chromium thiab 1% molybdenum, muaj kev tiv thaiv oxidation thiab corrosion ntau dua li P5, thiab tsim nyog rau qhov kub thiab txias thiab qhov chaw siab.
P11Cov yeeb nkab hlau P11 muaj 1.25% chromium thiab 0.5% molybdenum, muaj kev ua tau zoo dua, thiab siv dav hauv cov boilers kub thiab cov cua sov sib hloov.
P22: P22 cov yeeb nkab hlau muaj 2.25% chromium thiab 1% molybdenum, muaj lub zog kub siab thiab tiv taus oxidation, thiab feem ntau siv rau hauv cov kav dej kub thiab siab hauv cov chaw tsim hluav taws xob thiab kev lag luam petrochemical.
P91Cov yeeb nkab hlau P91 yog cov hlau chromium thiab molybdenum siab, muaj 9% chromium thiab 1% molybdenum, thiab muaj cov vanadium thiab nitrogen me ntsis. Nws muaj lub zog kub heev thiab lub zog nkag thiab siv dav hauv cov chaw tsim hluav taws xob supercritical thiab ultra-supercritical.
ASTM A213T-series:

T11Cov yeeb nkab hlau T11 muaj 1.25% chromium thiab 0.5% molybdenum, zoo ib yam li P11, thiab feem ntau yog siv rau hauv cov cua sov kub thiab cov boilers.
T22: T22 cov yeeb nkab hlau muaj 2.25% chromium thiab 1% molybdenum, tsim nyog rau qhov kub thiab txias thiab qhov siab, thiab siv dav hauv cov chaw tsim hluav taws xob thiab kev lag luam petrochemical.
T91Cov yeeb nkab hlau T91 zoo ib yam li P91, muaj 9% chromium thiab 1% molybdenum, thiab muaj vanadium thiab nitrogen. Nws muaj lub zog kub zoo heev thiab tiv taus kev nkag mus thiab tsim nyog rau cov chaw tsim hluav taws xob supercritical thiab ultra-supercritical.
EN 10216-2:
10CrMo9-10: Qhov no yog cov yeeb nkab hlau sib xyaw ua ke European uas muaj chromium thiab molybdenum, nrog lub zog kub zoo thiab tiv taus corrosion, feem ntau siv rau hauv cov chaw tsim hluav taws xob thiab kev lag luam petrochemical.
Cov yeeb nkab hlau tsis sib xyaw ua ke ua rau cov yeeb nkab hlau ua haujlwm tau zoo dua los ntawm kev ntxiv cov khoom sib xyaw tshwj xeeb rau hauv cov hlau, thiab tsim nyog rau ntau yam kev ua haujlwm hnyav. P series thiab T series cov yeeb nkab hlau uas muaj chromium siab thiab molybdenum siab, xws li P91 thiab T91, sawv cev rau kev coj ua ntawm cov khoom siv kub thiab siab niaj hnub thiab siv dav hauv cov chaw tsim hluav taws xob supercritical thiab ultra-supercritical. Kev xaiv cov khoom siv hlau tsis sib xyaw ua ke tsis yog tsuas yog ua kom muaj kev nyab xeeb thiab kev ua haujlwm ruaj khov ntawm qhov project, tab sis kuj tseem txhim kho lub neej ua haujlwm thiab kev ua haujlwm zoo ntawm cov khoom siv.