As the name implies, they are used repeatedly and are designed in such a Way that the casting can be

As the name
implies, they are used repeatedly and are designed in such a Way that the
casting can be removed easily and the mold used for the next casting. Metal
molds are better heat conductors than expendable nonmetallic molds hence, the
solidifying casting is subjected to a higher rate of cooling, which in turn
affects the microstructure and grain size Within the casting.

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