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Which of the following materials can have the negative volumetric shrinkage of the casting?(a) Aluminium(b) Steel(c) Zinc(d) Grey cast iron |
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Answer» The correct option is (d) Grey cast iron Easiest explanation: Different materials have different volumetric shrinkage, in which grey cast iron is the material which sometimes may have a negative shrinkage. This mainly occurs because of high carbon and silicon contents in the grey cast iron, which results in occurring of graphitization which increases the volume. |
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