Alloying involves combining aluminium with other metals like silicon, copper, magnesium, or zinc to improve certain properties of the casting, such as strength, corrosion resistance, or thermal conductivity. Different aluminium alloys are selected based on the requirements of the specific application:

  • Aluminium-Silicon Alloys (A356, A380): Common for die casting, known for good fluidity and castability.
  • Aluminium-Magnesium Alloys: Offer high strength and corrosion resistance, often used in marine and automotive parts.
  • Aluminium-Copper Alloys: Used in parts requiring high strength, such as engine components.

The choice of alloy influences the material’s mechanical properties, surface finish, and suitability for specific applications.