Na Septemba 1, 2021, Ngalaba Azụmaahịa nke US wepụtara ọkwa ịmalite nyocha nyocha mgbochi ọdịda anyanwụ na efere ígwè a na-akpọ "hot-rolled steel" (ngwaahịa ígwè a na-akpọ "hot-rolled") nke si Australia, Brazil, Japan, South Korea, Netherlands, Netherlands, Turkey, na United Kingdom wetara. E si Brazil bubata ya malitere nyocha ikpe nyocha mkpesa mbụ. Ha malitere nyocha ikpe nyocha mkpesa mbụ. Usoro mgbochi ịtụfu ihe na ịṅụ mmanya na-aba n'anya, n'ime oge a na-ahụ anya, ma mmebi nke ngwaahịa ndị metụtara ya kpatara na ụlọ ọrụ dị na United States ga-aga n'ihu ma ọ bụ mee. Ndị nwere mmasị kwesịrị ịdenye aha na Ngalaba Azụmaahịa nke US n'ime ụbọchị iri site na ụbọchị ọkwa a; ndị nwere mmasị kwesịrị izipu okwu na US International Trade Commission tupu Ọktoba 1, 2021, ma ọ gaghị agafe Nọvemba 16, 2021. Japan nyefere okwu gbasara azịza zuru oke na US International Trade Commission.

Na Julaị 12, 1999, Ministri Azụmaahịa kwụsịrị nyocha mgbochi ịtụfu ihe nke mpempe akwụkwọ ígwè a na-akpọ "hot-rolled" nke e si Russia bubata. Mgbe Ngalaba Azụmaahịa nke US na Kọmishọna Azụmaahịa Mba Nile nke US mere nyocha mbụ nke mgbochi ịtụfu ihe nke ọma nke ngwaahịa ndị metụtara na Russia, na Mee 12, 2005, na June 17, 2011, United States kwụsịrị nyocha nke ikpe ọgwụ mgbochi ịtụfu ihe nke Russia maka oge nke abụọ. Ọrụ siri ike ruo afọ 5. Disemba 19, 2011. Na Ọktoba 20, 2016, United States kwụsịrị nkwekọrịta nkwụsịtụ na ikpe ọgwụ mgbochi ịtụfu ihe nke mpempe akwụkwọ ígwè a na-akpọ "hot-rolled" nke Russia, ma malite itinye aka na ọrụ mgbochi ịtụfu ihe na ngwaahịa ndị dị na ikpe Russia. A na-azụta ntinye ụtụ isi ahụ maka afọ 5 ọzọ.

Na Ọgọst 31, 2015, Ngalaba Azụmaahịa nke US malitere nyocha mgbochi ịtụfu ihe na mpempe akwụkwọ ígwè a na-akpọ "hot rock" na Australia, Brazil, Japan, South Korea, Netherlands, Turkey, na United Kingdom. N'otu oge ahụ, ọ malitekwara nyocha mgbochi ịtụfu ihe na ngwaahịa ndị metụtara Brazil, South Korea, na Turkey. Ministri Azụmaahịa mere okwu mbụ gbasara ikpe ahụ na Jenụwarị 18, 2016 na Maachị 8, 2016 na Maachị 4, 2016, n'otu n'otu. Na 5th, 2016, Ngalaba Azụmaahịa nke US wepụrụ Australia, Brazil, South Korea, Netherlands, na Jerusalem. Na Ọktoba 3, 2016, US kwụsịrị mpempe akwụkwọ ígwè a na-akpọ "trolling" na Brazil na South Korea, ma n'otu oge ahụ kpatara mgbochi megide mpempe akwụkwọ ígwè a na-akpọ "hot rock" na Brazil, South Korea na Jerusalem. Mkpebi ikpeazụ. Iwu iji nye iwu mgbochi ịtụfu ihe megide ngwaahịa dị na Australia, Brazil, Turkey, South Korea, Netherlands, Japan na United Kingdom.