Official Answer
Answer
17-7PH (AMS 5678) bakin karfe ne mai taurin hazo wanda ke ba da karfin yawan amfanin ƙasa da juriyar gajiya idan aka kwatanta da alloys-jeri 300. A cikin yanayin CH900 (an rage sanyi da tsufa a $900 ^{\circ}F $), kayan yana samun babban ƙarfi mai ƙarfi wanda ya wuce 200 ksi. Wannan yana ba da damar ƙarin damuwa na aiki da ƙananan shakatawa a yanayin zafi mai tsayi har zuwa $650^{\circ}F$. Ba kamar bakin 302 ba, 17-7PH yana kula da modul ɗin sa na roba $E \ kusan 29.5 \ sau 10 ^ 6$ psi akai-akai a ƙarƙashin hawan keke, yana mai da shi manufa don masu kunna sararin samaniya mai mahimmanci da hatimin bawul.
