Zonke izinto ezisemkhakheni zinomlando omude, kepha namuhla sikhuluma ngokuthuthukiswa komlando kweI-alloy yensimbi yensimbi.
Kusuka empini yezwe yesibili kuya ngawo-1960s,I-alloy yensimbi yensimbiKwakuyinkathi enkulu yokuthuthukiswa kwensimbi enamandla anamandla kanye nensimbi enamandla aphezulu. Ngenxa yezidingo zomkhakha wezindiza kanye nentuthuko ye-rocket technology, ama-steelas amaningi anamandla aphezulu kanye nama-wensimbi aphezulu ensimbi, amabanga aphezulu awonke ama-all-all-amabanga aphezulu, amele ubuchwepheshe bensimbi ephezulu, ikakhulukazi ubuchwepheshe bokucwilisa i-accolling, ikakhulukazi, lamukelwa kabanzi. Insimbi ye-alloy yaqala ukuthuthuka ekuqondisweni kobumsulwa obuphezulu, ukunemba okuphezulu nekhabhoni ephansi ye-ultra. I-Marthering Steel ne-Ultra-Fire Ferrite yavela futhi.Now Insimbi yamabanga anjengensimbi engagqwali.