Insimbi engcono kakhulu yomphongolo incike ekusetshenzisweni okuqondile kanye nezidingo. Isibonelo, insimbi engagqwali ivamise ukusetshenziselwa ukumelana nokugqwala nokuqina, okuyenza ifaneleke izinhlelo zokusebenza lapho umgqomo uvezwa khona ezindaweni ezinokhahlo noma izinto ezigqwalile. Nokho, ezinye izinsimbi ezifana ne-carbon steel noma i-aluminium zingase zifaneleke kakhulu ezimweni ezihlukene ngokusekelwe ezicini ezifana nezindleko, isisindo kanye nezidingo ezithile zokusebenza. Kubalulekile ukucabangela izidingo ezithile zomgqomo wakho wesibhamu futhi uxhumane nochwepheshe bezinto zokwakha ukuze uthole insimbi engcono kakhulu yomsebenzi.

I-molybdenum ngokuvamile ayinamandla kunensimbi ngoba i-molybdenum ivame ukusetshenziswa njenge-alloying element ensimbi ukuze kuthuthukiswe amandla ayo, ubulukhuni, kanye nokungagqwala. Uma ingezwe kunsimbi ngamanani afanelekile, i-molybdenum ingathuthukisa kakhulu izici zensimbi zemishini, iyenze ifaneleke kakhulu izinhlelo zokusebenza ezinokucindezeleka okuphezulu njengokukhiqizwa kwama-alloys ensimbi anamandla aphezulu, okuhlanganisa nezinsimbi ze-chromium-molybdenum.

I-molybdenum ehlanzekile iyinsimbi ephikisayo enephuzu elincibilikayo eliphezulu namandla asezingeni eliphezulu aphezulu, kodwa ngokuvamile isetshenziswa njengengxube yensimbi eyinsimbi ukuze ithuthukise izakhiwo zayo kunokuba iyodwa ekusetshenzisweni kwesakhiwo. Ngakho-ke nakuba i-molybdenum ngokwayo ingenamandla kunensimbi, njenge-alloying element ingadlala indima ebalulekile ekwandiseni amandla nezakhiwo zensimbi.

Imiphongolo yezibhamu ngokuvamile yenziwa ngezinhlobo ezahlukene zensimbi, okuhlanganisa insimbi engagqwali, insimbi ye-carbon, nensimbi yengxubevange. Lezi zinto zikhethelwe amandla azo, ukuqina, kanye nekhono lokumelana nezingcindezi eziphezulu namazinga okushisa akhiqizwa ngesikhathi sokudutshulwa kwezibhamu. Ukwengeza, eminye imiphongolo ingenziwa ngama-alloys ensimbi akhethekile, njengensimbi ye-chromoly, enikeza amandla andayo nokumelana nokushisa. Uhlobo oluthile lwensimbi olusetshenziselwa umbhobho wesibhamu luncike ezintweni ezifana nokuhloswe ukusetshenziswa kwesibhamu, izici zokusebenza ezidingekayo, kanye nenqubo yokukhiqiza esetshenziswa umenzi wezibhamu.