Ihe nkedo ductile bụ ụdị ihe nkedo siri ike dị elu mepụtara na 1950s.Ọrụ ya zuru oke dị nso na ígwè.Ọ dabere na arụmọrụ ya dị mma nke ejirila nke ọma mee ihe nkedo akụkụ ụfọdụ na ike dị mgbagwoju anya, ike dị elu, ike siri ike na mgbochi iyi.Ígwè olulu mmiri etolitela ngwa ngwa ka ọ bụrụ ihe nkedo a na-ejikarị eme ihe nke abụọ karịa nkedo isi awọ.Ihe a na-akpọ "ígwè kama ígwè", tumadi na-ezo aka na ductile iron.

Iron ducular bụ graphite okirikiri site na spherulation na ọgwụgwọ ime ime, nke na-eme ka ihe eji arụ ọrụ nke igwe nkedo dị mma, ọkachasị plasticity na ike siri ike, ka o wee nweta ike dị elu karịa igwe carbon.

Igwe ihe nkedo bụ carbon nke ihe karịrị 2.11% nke ígwè carbon alloy, site na ígwè ezi ụlọ ọrụ mmepụta ihe, nchara nchara na ihe alloy ya mgbe agbaze na nkedo dị elu, na mgbakwunye na Fe, carbon na ihe nkedo ndị ọzọ n'ụdị graphite, mmiri ozuzo nke eriri graphite nke nkedo nke a na-akpọ ígwè nkedo isi awọ ma ọ bụ nkedo isi awọ, ikpuru nkedo ígwè a na-akpọ irighiri ink, otu igwe nkedo a na-akpọ ígwè nkedo ọcha ma ọ bụ code iron, na nkedo sppherical a na-akpọ sppherical ink cast iron.

Ngwakọta kemịkalụ nke ígwè ductile ma e wezụga ígwè na-abụkarị: carbon ọdịnaya 3.0 ~ 4.0%, silicon ọdịnaya 1.8 ~ 3.2%, manganese, phosphorus, sọlfọ ngụkọta adịghị gafere 3.0% na kwesịrị ekwesị ego nke obere ụwa, magnesium na ndị ọzọ globtized ọcha.