4000 jerin gabaɗaya yana da abun ciki na silicon tsakanin 4.5% da 6%, kuma mafi girman abun ciki na silicon, mafi girman ƙarfin. Matsayinsa na narkewa yana da ƙasa, kuma yana da kyakkyawan juriya na zafi da juriya. An fi amfani dashi a cikin kayan gini, sassa na inji, da dai sauransu.

5000 jerin, tare da magnesium a matsayin babban kashi, kuma za a iya kira a matsayin magnesium aluminum gami. Yawanci ana gani a cikin masana'antu, yana da ƙarancin ƙarancin ƙarfi, ƙarfin ƙarfi mai ƙarfi, da haɓaka mai kyau.

6000 jerin, tare da magnesium da silicon a matsayin manyan abubuwa, mayar da hankali ga halaye na hudu jerin da biyar jerin, dace da al'amura tare da babban lalata da hadawan abu da iskar shaka.

7000 jerin, yafi dauke da zinc element, kuma nasa ne na jirgin sama aluminum abu, za a iya kula da zafi, nasa superhard aluminum gami, kuma yana da kyau lalacewa juriya.

8000 jerin, wanda shine tsarin gami banda na sama, yana cikin wasu jerin kuma galibi ana amfani dashi don samar da foil na aluminum.