4000 e nang le li-silicon e na le dikahare tsa silicon lipakeng tsa 4.5% le 6%, matla a Sillison, matla a Sireletsang. Ntlha ea eona e qhibilihang e tlase, 'me e na le ho hanyetsa mocheso hantle le ho hanyetsa. E sebelisoa haholo ka lisebelisoa tsa moaho, likarolo tsa mochini, jj.

5000 Letoto la Magnesium joalo ka karolo ea sehlooho, le tsona li ka bitsoa li-Magnesium Allomin. Boholo bo bonoang indastering, e na le litekanyetso tse tlase, matla a phahameng le matla a matle.

Litharollo tse 6000, tse nang le silimous e le lintho tse ka sehloohong, tsepamisa maikutlo litšosong tse nang le meharo e phahameng le oxidation.

Likhetho tse 7000, haholoholo tse nang le karolo ea Zinc lisebelisoa tsa Avice, le tsona ke mocheso o moholo ho otlolla Allogard Allord allows.

8000 Letoto, e leng tsamaiso e ntle e ntle, e leng letoto la letoto la letoto la letoto ebile e sebelisoa haholo tlhahiso ea aluminium.