Ọ bụla ihe onwunwe na ụlọ ọrụ nwere ogologo akụkọ ihe mere eme, ma taa, anyị na-tumadi okwu banyere akụkọ ihe mere eme mmepe nkealloy ígwè forgings.
Site na Agha Ụwa nke Abụọ ruo n'afọ 1960,alloy ígwè forgingsbụ tumadi oge nke mmepe nke nnukwu ígwè na ultra-ike ígwè. N'ihi mkpa nke ụgbọ elu ụlọ ọrụ na mmepe nke rọketi technology, ọtụtụ ọhụrụ elu-ike steels na ultra-elu-ike steels pụtara ígwè akara ule, dị ka mmiri ozuzo hardening elu-ike igwe anaghị agba nchara na dị iche iche ala alloy elu-ike steels, bụ ya nnọchiteanya ígwè grades.Mgbe 1960s na-arụ ọrụ nke metal-furna teknụzụ ọhụrụ, karịsịa ajị anụ, ọtụtụ ọhụrụ metal-furna teknụzụ. teknụzụ, nakweere ọtụtụ ebe. Alloy ígwè malitere ịzụlite na ntụziaka nke ịdị ọcha dị elu, nkenke dị elu na ultra-low carbon. Maging ígwè na ultra-dị ọcha ferrite pụtara ọzọ. Ọhụrụ ígwè akara ngosi dị ka igwe anaghị agba nchara.