Shanghai Jingdian Technology C., Ltd

The Difference between Ductile Iron and Gray Iron

 Continuous casting of ductile and gray iron dominates the industry in terms of low material cost, high machinability and high performance. Both metals are used for a wide range of applications, including construction equipment, pipe fittings, oil field machinery and even transportation services.
1.Gray iron’s tensile strength ranges from 20,000 psi – 60,000 psi, whereas ductile iron’s ranges from 65,000 psi – 80,000 psi and can be heat treated to 100,000 psi
2.Ductile iron has lower thermal conductivity, so it can insulate better than gray iron
3.Ductile iron is more tailored for engineering applications
4.Graphite in ductile iron is nodular, and flaked in gray iron—meaning ductile iron is stronger and contains higher ductility
5.Gray iron dampens vibration better than ductile iron
Ductile iron:
Gray iron:

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