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Why Is Nodular Cast Iron Better Than Cast Steel?

Nov 16, 2022

Due to the spheroidal graphite microstructure of nodular cast iron, it is better than cast steel in reducing vibration capacity, so it is more conducive to reducing stress. An important reason for choosing ductile iron is that the cost of ductile iron is lower than that of cast steel. The low cost of ductile iron makes this material more popular, with higher casting efficiency, and also reduces the machining cost of ductile iron.

The strength of nodular cast iron is comparable to that of cast steel. Ductile iron has higher yield strength, the lowest yield strength is 40k, while the yield strength of cast steel is only 36k. In most municipal applications, such as water, salt water, steam, etc., the corrosion resistance and oxidation resistance of ductile iron are better than that of cast steel.

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