Official Answer
Answer
17-7PH CH900 (Yanayin C, sannan hazo mai taurare a 900F) kyakkyawan abu ne na gaba ɗaya tare da ƙarfin ƙarfi mai ƙarfi ($ ≈$ 1380 MPa), amma matsakaicin zafin aikinsa yana iyakance zuwa kusan 340 ° C (650 ° F). Sama da wannan, yana fama da saurin shakatawa na damuwa. Ga masu kunna bawul na ƙarƙashin teku a 300 ° C, 17-7PH yana kusa da iyakarsa. Inconel X-750 (Ni-Cr alloy) shine babban zaɓi don kwanciyar hankali mai zafi har zuwa 700 ° C. Yana kiyaye modulus ɗin sa na roba $E$ kuma yana tsayayya da raɗaɗi mafi kyau. Yayin da X-750 ya fi tsada kuma ya fi wuya a samar, juriyar sa ga chloride-induced stress corrosion cracking (SCC) ya sa ya zama ma'auni na babban abin dogaro na yanayin mai da iskar gas.
