Choose the correct option: Grey and spheroidal cast irons mainly diffe

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Module 5: Alloying of Steel

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Choose the correct option:

Grey and spheroidal cast irons mainly differ in that the graphite phase is present as:

(i) Flakes in grey iron and spheroidal nodules in spheroidal iron
(ii) Cementite in grey iron and flakes in spheroidal iron
(iii) Spheroidal nodules in grey iron and flakes in spheroidal iron
(iv) Cementite in both alloys

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