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ductile iron vs. gray iron

Some iron casting buyers may be confused about the ductile iron and gray iron, so herein, we discussing the ductile iron versus gray iron.

The graphite in gray iron is flaky shape, but the graphite in ductile iron is spherical shape. Therefore, gray iron has lower strength and easy fragile compared with ductile iron. However, gray cast iron has lower production cost, easy to cast, better shock absorption and abrasive resistance.

Therefore, gray cast iron is normally used to produce low strength castings, such as bases, balance weights, boxes, stove parts etc. The ductile cast iron is normally used to produce high strength and ductility castings, such as brackets, crankshafts, connecting rods etc. Ductile iron has larger application vs gray iron.

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