Cov ntaub ntawv feem ntau ua los ntawm tshuab dhos yog pub dawb - txiav hlau thiab tooj liab. Dawb- txiav steels muaj cov sulfur S thiab phosphorus P. Sulfur thiab manganese muaj nyob rau hauv hlau nyob rau hauv daim ntawv ntawm manganese sulfide, thaum manganese sulfide nyob rau hauv daim ntawv ntawm manganese sulfide.
Cov khoom siv feem ntau siv hauv tshuab dhos niaj hnub siv cov ntaub ntawv aluminium alloy. Qhov ntom ntawm aluminium alloy cov ntaub ntawv yog txo qis heev piv rau qhov ntom ntawm cov hlau thiab hlau cov ntaub ntawv, thiab cov txheej txheem tshuab dhos tsis yooj yim, cov yas muaj zog, cov khoom hnyav tau txo qis, thiab cov tshuab dhos ua haujlwm tau luv heev. Lub sij hawm los nrog kev txo nqi ua aluminium alloy lub darling ntawm aviation accessories teb.
