Tenaris: Mafi girma a duniyabututun ƙarfe mara sumulmai samarwa, wanda ke da ƙarfi da riba mai yawa. Hedkwatarsa ​​​​a Luxembourg.

Karfe na Musamman na CITIC: Jagora a masana'antar ƙarfe na musamman, wanda ke da cikakken ƙarfin samar da tan miliyan 20 na ƙarfe na musamman kowace shekara.

Vallourec: Jagora ce a duniya a fannin bututun ƙarfe masu inganci, wacce aka san ta a duk duniya saboda fasaharta kuma tana cikin kasuwa mai tsada.

Rukunin TMK: Babban kamfanin kera bututun ƙarfe na Rasha, wanda kuma ke da babban matsayi a kasuwar Amurka.

Nippon Steel: Kamfanin ƙarfe na ƙasar Japan ne, kuma kayayyakinsa sun shafi fannoni daban-daban na masana'antu, waɗanda aka san su da manyan matsayi da kuma injiniyancin da ya dace.

Interpipe: Ɗaya daga cikin manyan kamfanonin samar da bututun da ba su da matsala a duniya, kuma babban ɗan wasa ne a kasuwa.

ArcelorMittal: Ɗaya daga cikin manyan kamfanonin samar da ƙarfe a duniya, wanda ke amfani da ƙarfin samar da ƙarfe mai yawa don cimma tattalin arziki mai girma.

JFE Karfe: Ɗaya daga cikin manyan masana'antun bututun ƙarfe marasa shinge a duniya, wani babban kamfanin kera ƙarfe na Japan.

Tata Steel: Kamfanin ƙarfe na Indiya na duniya wanda kayayyakinsa suka cika ƙa'idodin ƙasashen duniya.

ChelPipe Group & OMK: Babban kamfanin bututun ƙarfe na Rasha kuma babban ɗan wasa a kasuwar duniya.

Jindal Saw: Babban kamfanin kera bututun ƙarfe na Indiya wanda ke da tasiri sosai a fannin bututun ƙarfe mai girman diamita mara shinge na duniya.

Borusan Mannesmann: Babban kamfanin kera bututun ƙarfe na Turkiyya wanda ke kan iyakar Turai da Asiya, wanda ke da tasiri sosai a kasuwar yankin.

EVRAZ: Kamfanin ƙarfe da haƙar ma'adinai na duniya wanda aka haɗa shi a tsaye wanda kasuwancinsa ya ƙunshi kera bututun ƙarfe.

Rukunin EEW: Kamfanin kera bututun ƙarfe na ƙasar Jamus wanda ya ƙware a manyan bututun ƙarfe, wanda aka san shi da inganci da daidaiton kayayyakinsa.

Severstal: Ɗaya daga cikin manyan kamfanonin ƙarfe na Rasha, waɗanda ke da babban matsayi a kasuwannin Rasha da na ƙasashen duniya.

Fasahar Kingland & Pipeline: Shahararriyar 'yar wasa ce a duniya a fannin bututun ƙarfe mai girman diamita mara shinge.

Bugu da ƙari, Rasha kuma tana da PAO TMK (ƙimar kasuwar jarin kusan dala biliyan 1.83), wanda yawanci kamfani ɗaya ne ko kuma yana da alaƙa sosai da Ƙungiyar TMK da aka ambata a baya; duka manyan kamfanoni ne a masana'antar kera bututun ƙarfe ta Rasha.

Manyan Matakan Gasar Duniya
Dangane da ƙarfinsu da matsayinsu a masana'antu, waɗannan kamfanoni za a iya raba su zuwa matakai masu zuwa:
Mataki na 1 (Shugabannin Duniya): Tenaris, Vallourec, TMK Group, CITIC Special Steel. Waɗannan kamfanoni huɗu suna da tasiri mafi girma a duniya, mafi cikakken layin samfura, da kuma babban ƙarfin samarwa, wanda hakan ya sa suka zama manyan kamfanoni a masana'antar.

Mataki na 2 (Shugabannin Yankuna/Fasaha): Nippon Steel, Interpipe, ArcelorMittal. Suna da ƙarfi mai ƙarfi da fa'idodi masu gasa a takamaiman yankuna (kamar Japan da Turai) ko takamaiman fannoni na fasaha (kamar masana'antar Nippon Steel mai matuƙar inganci).

Mataki na 3 (Muhimman 'Yan Kasuwa): JFE Steel, Tata Steel, ChelPipe, OMK, Jindal Saw, Borusan Mannesmann, da sauransu. Waɗannan kamfanoni suna taka muhimmiyar rawa a ƙasashensu ko sassan kayayyaki (kamar Indiya, Rasha, Turkiyya, bututun mai girman diamita, da bututun bututu), kuma suna da matuƙar muhimmanci a cikin sarkar samar da kayayyaki ta duniya.