E batla e tšoana le Aisi 4130 Chrome-Molybes ALLYTER AFYBDENUM E ALING, Empa ka litaba tse phahameng haholo tsa khabone. Ha e bapisoa le Aisi \
Asiy Steel, Aisi 4140 steel, e fanang ka matla a phahameng le ho lokisa mocheso, o fana ka phoso e fokolang.