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Shrinkage Cavity Casting Defects and Causes


  • Shrinkage occurs because metals as liquids are less dense than solids.

    Shrinkage cavities are depressions that appear in castings during solidification. The shrinkage pores appear with angular edges compared to the rounded surfaces of the gas pores. Voids may also be paired with dendritic breaks or cracks.

    Large shrinkage cavities can destroy the integrity of the casting and may cause it to eventually rupture under pressure.

    Shrinkage can cause two types of casting defects.

    For more information on shrinkage, please click here.