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Home / R&R Academy / Defect Analysis / Negative Metal Defects / Blowholes or Gas

Blowholes or Gas


Blowholes or gas present as a small or large number of spherical cavities, superficial or in depth. This defect indicates that either air was entrapped at casting or that gas separated from the metal at solidification. 

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The causes of this defect are evident in the metal and other portions of the process. To cure these causes, R&R recommends taking the following actions.

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