Official Answer
Answer
A cikin mahalli na cryogenic (misali, nitrogen mai ruwa a -196 C), ƙarfin yawan amfanin ƙasa $\sigma_y$ da ƙarfin juzu'i na bakin karfe kamar 302 ko 316 karuwa, amma ductility yana raguwa. Ƙimar ƙarfin ɗaukar nauyi $P_g = (D \ cdot d \ cdot \ pi \ cdot \ sigma_y) / S_f$ yana nuna karuwa a iya aiki. Koyaya, haɗarin karaya ya zama babban yanayin gazawar. Dole ne a ƙara ƙimar aminci $S_f$ daga 2 zuwa 4 don lissafin rage taurin karaya $K_{IC}$. Bugu da ƙari kuma, dole ne a ƙididdige ƙayyadaddun yanayin zafi na zobe ($ L = L_0 \ cdot \ alpha \ cdot \ Delta T $) don tabbatar da cewa zoben bai yi kwangila ba har ya ɗaure a kan shaft ko kuma ya faɗaɗa daga cikin tsagi saboda bambancin yanayin sanyaya tsakanin zobe da gidaje.
