Answer
17-7PH (Yanayin CH900) bakin karfe ne mai taurin hazo wanda ke ba da kyakkyawan ƙarfi da kaddarorin gajiya har zuwa $650^{\circ}F$ ($343^{\circ}C$). Ana rage sanyi zuwa yanayin C sannan yana kan $900^{\circ}F$ na awa daya. Bayan wannan zafin jiki, kayan aikin injinsa suna raguwa saboda yawan tsufa. Sabanin haka, Inconel X-750 (kowace AMS 5699) wani allo ne na nickel-chromium wanda ke kula da kaddarorin bazara da juriya har zuwa $1300^{\circ}F$ ($704^{\circ}C$). Don bawul ɗin sharar sararin samaniya, ana buƙatar Inconel X-750 saboda yawan shakatawa na 17-7PH a waɗannan yanayin zafi zai haifar da asarar da aka riga aka yi, wanda zai haifar da gazawar hatimi. Kasuwancin-kashe farashi ne kuma ƙaramin Modulus na Ƙarfafawa ($ E \ kusan 213 $ GPa na 17-7PH vs $ 211 $ GPa na X-750, yana ƙara raguwa a lokacin zafi).
