Aluminum Alloys Aluminum Alloys SIA ” Lējumi un Būve” produces aluminum alloys as per standard specifications and manually chosen chemical analysis. Production of aluminum alloys according to standards: EN AC – AlSiCu3(Fe) (226D)EN AC – AlSi12Cu (231D)EN AC – AlSi10Mg (239D)EN AC – AlSi12 (230D)EN AC – AlSi10Mg (233D)