Definition Of Casting : It is the process in which material is liquefied by heating and poured into previously prepared mould cavity where it allow to solidify. Solidified product taken out from the cavity, trimmed and cleaned to shape.
Suitability of the casting operation for a given material depends on:
1) Melting temperature of the job and mould material.
2) Solubility of the material used for casting and its chemical reaction between job and the mould material.
3) Solubility of the atmosphere in the material at different temperatures to be encountered in the casting process.
4) Thermal Properties such as conductivity and coefficient of linear expansion of both the mould and job materials.
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