Glossary
AlSi — aluminium-silicon — definition
The family of aluminium alloys with silicon as the main addition — the most common casting alloys in existence.
Silicon is added because it makes the melt fluid, reduces shrinkage and gives good castability. Without silicon, aluminium would be a difficult metal in which to cast thin, complex parts.
Within the family, properties vary with the other additions. Copper raises strength and machinability but reduces corrosion resistance — an important detail in marine applications. Magnesium makes the alloy heat treatable.
Designations follow the European standard for aluminium casting alloys, in the form EN AC- followed by five digits, often with the chemical designation alongside.
Which specific alloys we run is stated on request.