ʻO kēlā me kēia mea i loko o ka ʻoihana he moʻolelo lōʻihi, akā i kēia lā ke kamaʻilio nui nei mākou e pili ana i ka ulu ʻana o ka mōʻaukalanā mea hao hao.
Mai ke kaua honua ʻelua a hiki i ka makahiki 1960,nā mea hao haoʻo ia ka manawa o ka hoʻomohala ʻana i ke kila ikaika a me ke kila ultra-kiʻekiʻe.Ma muli o nā pono o ka ʻoihana mokulele a me ka hoʻomohala ʻana i ka ʻenehana rocket, nui nā kila ikaika kiʻekiʻe a me nā kila ultra-kiʻekiʻe i ʻike ʻia nā māka kila, e like me ka paʻakikī o ka ua kiʻekiʻe ka ikaika a me nā ʻano kila ikaika kiʻekiʻe. ʻO ia kona mau māka kila.Ua hoʻomaka ke kila Alloy e hoʻomohala i ke ʻano o ka maʻemaʻe kiʻekiʻe, kiʻekiʻe kiʻekiʻe a me ka ultra-low carbon.Ua ʻike hou ʻia ke kila Maraging a me ka ultra-pure ferrite. ʻO nā māka kila hou e like me ke kila kila.