Official Answer
Answer
17-7PH (Nau'in 631) bakin karfe shine hazo-hardening gami wanda ke ba da kyakkyawar haɗuwa da ƙarfin ƙarfi, juriya na gajiya, da juriya na lalata. A cikin yanayin CH900, kayan yana sanyi-raguwa zuwa Yanayin C sannan kuma ya taurare a $900^{\circ}F$ ($482^{\circ}C$) na awa daya. Wannan tsari yana canza tsarin martensitic kuma yana haifar da mahadi na tsaka-tsakin aluminium, yana haɓaka ƙarfin ƙarfi sosai (har zuwa 240-265 ksi). Wannan maɗaukakin maɗaukaki na roba da ƙarfin amfanin ƙasa yana ba da damar ɓangarorin ɓarke a cikin maɓuɓɓugan ruwan raƙuman ruwa, yana sauƙaƙe ƙaranci a cikin na'urorin likitanci da na'urori masu auna sararin samaniya yayin kiyaye ƙimar bazara.
