Ana amfani da bututun ƙarfe marasa ƙarfi. Dangane da amfani daban-daban, akwai bututun ƙarfe maras kauri mai kauri da bututun ƙarfe maras katanga.
1. Janar manufa sumul karfe bututu ana birgima daga talakawa carbon tsarin karfe, low gami tsarin karfe ko gami tsarin karfe bisa ga kayan. Misali, bututun da aka yi da ƙananan karfe kamar 10# da 20#, galibi ana amfani da su a matsayin bututun sufuri don yin tururi, iskar gas, iskar gas, iskar gas, albarkatun mai daban-daban da sauran iskar gas ko ruwa iri-iri; matsakaicin ƙarfe na carbon kamar 45 da 40Cr Bututun da aka ƙera ana amfani da su musamman don kera sassa daban-daban na inji da kayan aikin bututu.
2. Ana ba da bututun ƙarfe mara ƙarfi don dalilai na gabaɗaya bisa ga tsarin sinadarai da kaddarorin inji, kuma bisa ga gwajin hydraulic. Bututun ƙarfe mara ƙarfi waɗanda ke ɗauke da matsa lamba dole ne su wuce gwajin matsa lamba na ruwa.
3. Ana amfani da bututu marasa mahimmanci na musamman a cikin tukunyar jirgi, binciken ƙasa, bearings, juriya na acid, da sauransu.fasa bututudon masana'antar petrochemical,bututun tukunyar jirgi, masu ɗauke da bututu da manyan bututun ƙarfe na ƙarfe don motoci, tarakta da jirgin sama.
Tsarin bututun ƙarfe maras sumul ana amfani da su don tsarin gaba ɗaya da tsarin injina. Abubuwan wakilcinsa (maki): carbon karfe No. 20, No. 45 karfe; gami karfeQ345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, da dai sauransu.
An fi amfani da bututun ƙarfe marasa ƙarfi don jigilar ruwa don jigilar bututun ruwa a cikin injiniya da manyan kayan aiki. Abubuwan wakilci (maki) sune 20, Q345, da sauransu.
Ana amfani da bututun ƙarfe marasa ƙarfi don ƙananan matsi da matsakaitan tukunyar jirgi galibi ana amfani da su don bututun da ke jigilar ƙananan matsa lamba a cikin tukunyar jirgi na masana'antu da na gida. Abubuwan wakilci sune No. 10 da 20 # karfe.
Ana amfani da bututun ƙarfe maras ƙarfi don tukunyar jirgi mai matsananciyar ƙarfi don matsanancin zafi da matsa lamba na jigilar ruwa da bututu a cikin tashar wutar lantarki da tukunyar makamashin nukiliya. Abubuwan wakilci sune20G, 12Cr1MoVG, 15CrMoG, da dai sauransu.
Ana amfani da bututun ƙarfe maras ƙarfi don kayan aikin taki mai ƙarfi don jigilar bututun zafi da matsanancin matsin lamba akan kayan aikin taki. Abubuwan wakilci sune 20, 16Mn,12CrMo, 12Cr2Mo, da dai sauransu.
An fi amfani da bututun ƙarfe marasa ƙarfi don fasa man fetur a cikin tukunyar jirgi, masu musayar zafi da bututun jigilar ruwa a cikin tsire-tsire masu narkewar mai. Abubuwan wakilcinsa sune 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, da sauransu.
An fi amfani da bututun ƙarfe marasa ƙarfi don silinda gas don yin iskar gas daban-daban da silinda na ruwa. Abubuwan wakilcinsa sune 37Mn, 34Mn2V, 35CrMo, da sauransu.
Ana amfani da bututun ƙarfe maras zafi mai zafi don kayan kwalliyar ruwa, waɗanda galibi ana amfani da su don yin goyan bayan na'ura mai aiki da ƙarfi, silinda da ginshiƙai a cikin ma'adinan kwal, da sauran nau'ikan silinda da ginshiƙai. Abubuwan wakilcinsa sune 20, 45, 27SiMn, da sauransu.
Cold-ja ko sanyi-birgima daidaici sumul karfe bututu aka yafi amfani ga inji Tsarin da carbon latsa kayan aiki, bukatar high girma daidaito da kuma mai kyau surface gama. Abubuwan wakilcinsa sun haɗa da 20, 45 karfe, da dai sauransu.
Ana amfani da bututun ƙarfe maras sumul sanyi da bututun ƙarfe na musamman don yin sassa da sassa daban-daban. An yi su da ƙaƙƙarfan ƙarfe na tsarin carbon da ƙananan ƙarfe na tsarin ƙarfe.
Madaidaicin diamita na ciki maras sumul bututu na na'ura mai aiki da karfin ruwa da pneumatic cylinders ana amfani da yafi amfani da sanyi-ja ko sanyi-birgima sumul karfe bututu tare da madaidaicin diamita na ciki don na'ura mai aiki da karfin ruwa da pneumatic cylinders. Its wakilci kayan ne 20, 45 karfe, da dai sauransu.