Answer
Inconel X-750 (AMS 5699) sigar nickel-chromium alloy ne wanda ya rage ductile kuma yana kula da ma'aunin sa na roba a yanayin zafi na cryogenic, yayin da yawancin ƙarfe na martensitic suka zama gaggautsa. 17-7PH, yayin da yake da kyau a cikin zafin jiki, zai iya wahala daga raguwar taurin karaya a yanayin zafi da ke ƙasa $-100^{\circ}F$. Inconel X-750's precipitate period (gamma prime) yana ba da kwanciyar hankali zuwa $-400^{\circ}F$. Don hatimin cryogenic, an fi son Inconel X-750 saboda ƙarancin haɓakar haɓakar yanayin zafi da juriya ga fashewar taimakon hydrogen a cikin keɓantaccen mahalli na ƙarƙashin teku ko sararin samaniya. Maganin zafi na X-750 yawanci ya haɗa da warware matsalar da ke biye da taurin shekaru ($1350^{\circ}F$ na awanni 20) don haɓaka ƙarfin amfanin gona.
