Chitoliro chachitsulo chosasunthika cha aloyi ndi chinthu chogwira ntchito kwambiri chomwe chimagwiritsidwa ntchito kwambiri pamakampani ndi zomangamanga. Mbali yake yaikulu ndi kusintha makina katundu, kukana dzimbiri ndi kutentha kukana kwa mapaipi zitsulo powonjezera zinthu zosiyanasiyana aloyi, monga chromium, molybdenum, faifi tambala, etc.

Chithunzi cha ASTM A335P mndandanda:

P5: P5 chitsulo chitoliro lili 5% chromium ndi 0.5% molybdenum, ali wabwino makutidwe ndi okosijeni kukana ndi mkulu kutentha mphamvu, ndipo nthawi zambiri ntchito mapaipi nthunzi kutentha mkulu ndi makampani petrochemical.
P9: P9 chitsulo chitoliro lili 9% chromium ndi 1% molybdenum, ali apamwamba kukana makutidwe ndi okosijeni ndi dzimbiri kukana dzimbiri kuposa P5, ndipo ndi oyenera kutentha ndi kutentha kwambiri chilengedwe.
p11: Chitoliro chachitsulo cha P11 chili ndi 1.25% chromium ndi 0.5% molybdenum, chimakhala ndi ntchito yabwino kwambiri, ndipo chimagwiritsidwa ntchito kwambiri muzotenthetsera kutentha ndi kutentha.
P22: P22 chitsulo chitoliro lili 2.25% chromium ndi 1% molybdenum, ali mkulu kutentha mphamvu ndi makutidwe ndi okosijeni kukana, ndipo nthawi zambiri amagwiritsidwa ntchito mu kutentha ndi mkulu kuthamanga mapaipi mu zomera mphamvu ndi makampani petrochemical.
p91: P91 chitsulo chitoliro ndi mkulu chromium ndi mkulu molybdenum chitsulo, muli 9% chromium ndi 1% molybdenum, ndipo muli trace kuchuluka kwa vanadium ndi nayitrogeni. Ili ndi mphamvu ya kutentha kwambiri komanso mphamvu zokwawa ndipo imagwiritsidwa ntchito kwambiri m'mafakitale amphamvu kwambiri komanso apamwamba kwambiri.
ASTM A213T mndandanda:

T11: Chitoliro chachitsulo cha T11 chili ndi 1.25% chromium ndi 0.5% molybdenum, yofanana ndi P11, ndipo imagwiritsidwa ntchito makamaka pa kutentha kwakukulu kwa kutentha ndi ma boilers.
T22: Chitoliro chachitsulo cha T22 chili ndi 2.25% chromium ndi 1% molybdenum, yoyenera kutentha kwambiri ndi malo othamanga kwambiri, ndipo imagwiritsidwa ntchito kwambiri m'mafakitale amagetsi ndi mafakitale a petrochemical.
T91: Chitoliro chachitsulo cha T91 ndi chofanana ndi P91, chokhala ndi 9% chromium ndi 1% molybdenum, ndipo chili ndi vanadium ndi nayitrogeni. Ili ndi mphamvu yabwino kwambiri yotentha komanso kukana kukwawa ndipo ndiyoyenera kupangira magetsi opitilira muyeso komanso apamwamba kwambiri.
EN 10216-2:
10CrMo9-10: Ichi ndi chitoliro chachitsulo cha aloyi ku Europe chokhala ndi chromium ndi molybdenum, chokhala ndi mphamvu yabwino yotentha komanso kukana dzimbiri, yomwe imagwiritsidwa ntchito kwambiri m'mafakitale amagetsi ndi mafakitale amafuta.
Mapaipi azitsulo opanda aloyi amathandizira kwambiri magwiridwe antchito a mapaipi achitsulo powonjezera zinthu zina za aloyi ku chitsulo, ndipo ndi oyenera pamikhalidwe yosiyanasiyana yogwirira ntchito. P mndandanda ndi T mndandanda mkulu chromium ndi mkulu molybdenum zitsulo mipope, monga P91 ndi T91, amaimira mayendedwe amakono kutentha ndi zipangizo kuthamanga mkulu ndipo chimagwiritsidwa ntchito supercritical ndi kopitilira muyeso-supercritical mphamvu zomera. Kusankha aloyi yoyenera zitsulo zopanda msokonezo za chitoliro sizingatsimikizire chitetezo ndi ntchito yokhazikika ya polojekitiyi, komanso kusintha kwambiri moyo wautumiki ndi mphamvu ya zida.