Official Answer
Answer
302 Bakin Karfe yana daidaitawa kuma yana iya canzawa daga austenite zuwa martensite lokacin sanyi-aiki (a lokacin aikin murɗa) ko kuma lokacin da aka fallasa yanayin yanayin cryogenic. Wannan canji yana haifar da haɓaka ƙara (kimanin 4%). Don daidaitattun zoben da aka yi amfani da su a cikin tsarin ruwa na sararin samaniya ($ LOX$), wannan na iya haifar da zoben ya 'girma' kuma ya rasa rikonsa a kan tsagi. Ana amfani da 'Cryogenic Jiyya' (jiƙa a $-320^{\circ}F$) don tilasta wannan canji zuwa ƙarshe yayin masana'anta. Bayan an canza, zoben yana rage damuwa. Wannan yana tabbatar da cewa girman zoben ya tsaya tsayin daka yayin ainihin sabis na cryogenic, yana hana zoben fadadawa da kasa riƙe taron.
