Akụkụ akụkụ nke igwe CNC nke ductile bụ ihe arụ ọrụ igwe nke CNC na-emepụta site na iji akụrụngwa nke igwe nkedo ductile.Nkedo nkedo abụghị otu ọkwa nke nkedo, kama otu igwe nkedo, nke a na-akpọkwa ígwè nodular ma ọ bụ spheroidal graphite cast iron (SG cast iron). Ngwongwo nkedo nodular na-enweta graphite nodular site na spheroidization na ọgwụgwọ inoculation, nke na-eme ka ihe eji arụ ọrụ nke ígwè nkedo dịkwuo mma, karịsịa plasticity na ike siri ike, iji nweta ike dị elu karịa carbon ígwè.Iron ductile nwere ọtụtụ ihe dị iche iche site na njikwa nke microstructure. Ihe njirimara na-akọwakarị nke otu ihe a bụ ọdịdị nke graphite. Na ductile ígwè, graphite dị n'ụdị nodules kama flakes dị ka ọ dị na isi awọ ígwè. Ọdịdị dị nkọ nke flakes nke graphite na-emepụta ebe ịta ahụhụ n'ime matrix metal, ebe ọdịdị gburugburu nke nodules dị ntakịrị, si otú a na-egbochi mmepụta nke cracks na inye nkwalite.ductility. Nke a bụ ya mere anyị ji akpọ ha ductile cast iron.