Zvese zvinhu muindasitiri zvine nhoroondo refu, asi nhasi isu tiri kunyanya kutaura nezve nhoroondo yekusimudziraalloy simbi forgings.
Kubva muhondo yenyika yechipiri kusvika kuma1960,alloy simbi forgingsyainyanya nguva yekuvandudzwa kwesimbi yakasimba-yakasimba uye ye-ultra-high-simba simbi. Nekuda kwezvinodiwa zveindasitiri yekubhururuka nendege uye kuvandudzwa kwetekinoroji yeroketi, simbi itsva dzakawanda dzakasimba uye simbi dzepamusoro-soro dzakaonekwaMakisi esimbi, akadai sekunaya kwemvura kuomesa simbi isina tsvina uye simbi dzakasiyana-siyana dzakaderera-alloy yakakwirira-simba, ndiwo magiredhi ayo esimbi anomiririra. Mushure memakore ekuma1960, matekinoroji mazhinji matsva esimbi, kunyanya kunze-kwe-furnace refining tekinoroji, yakagamuchirwa zvakanyanya. Alloy simbi yakatanga kusimukira munzira yekuchena kwepamusoro, kurongeka kwepamusoro uye ultra-low kabhoni. Maraging simbi uye ultra-pure ferrite zvakaonekwa zvakare.New simbi mamakisi akadai Stainless simbi.