Ma ʻAmelika Hui Pū ʻIa i nā makahiki 1930, ua ʻike nā mea hana kaʻa lanahu i ka hoʻomohala ʻana o kekahi mau mea kila i kahi papa o ka ʻōpala i ka wā e ʻike ʻia ai kēia mau mea, ʻaʻole ia e ʻino i ke kila, akā e pale iā ia.
ʻO ka lōʻihi, lepo, ʻalani-ʻulaʻula ʻulaʻula o kēia mau alloys ua lilo koke i mea kaulana loa i waena o nā mea kālai a hoʻomau a hiki i kēia lā.
ʻO ke kila Corten ka hui ʻana o ke kila a me nā mea hoʻohui e like me ke ʻano o ke kila corten. He kila me ka phosphorus, keleawe, chromium a me ka nickel-molybdenum. Ma mua o ka ʻike ʻana i nā mea ʻeleʻele, ʻeleʻele ʻeleʻele kona ʻili i hōʻike ʻia ua hāʻawi ʻia ka huahana hewa, akā i ka manawa e hoʻomohala ʻia kahi patina e .
E like me ka mea i ʻōlelo ʻia ma mua, ʻo Corten steel he kila kū i ka wā e hiki ke kapa ʻia ʻo 'Atmospheric Corrosion Resistant Steel', a ʻo kāna mau mea hoʻohui o ke keleawe a me ka chromium ka mea e hāʻawi ai i kēia pae o ke kū'ē o ka lewa.
ʻAʻole kūpono ke kila Corten wale nō, akā kūpono hoʻi i ka hana: paʻa, kūpaʻa i ka wā a me nā wela. E ʻoki koke kēia wela i ka steak a paʻa i ka gravy. A ʻaʻole i nīnau ʻia kona pono a me ka lōʻihi.