of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions

Full Title

Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working (apparatus for mechanical working of metal B21, B23, B24) > of aluminium or alloys based thereon > of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions