A master alloy is a base metal such as Aluminium, Copper or Nickel combined with a relatively high percentage of one or two other elements. A master alloy is a semi-finished product ,which is used as a raw material by the metals industry. Master alloys are produced in various shapes Like ingot, piglet ,waffle plate, rod , lumps, chips, etc.
Changing the composition of the liquid metal to achieve the desired chemical specification. -- Structure control - influencing the microstructure of a metal during the casting and solidification process in order to change its properties like mechanical strength, ductility, electrical conductivity, Castability
A master alloy also referred to as "hardener", "grain refiner" or "modifier" depending on its application.