The machining for the nodular cast iron is difficult, but some types such as QT450 (FCD450) could be machined with solid cbn inserts.

The characteristics of the nodular cast iron is as follows:

Ductile iron refers to cast iron in which iron is precipitated as nodular cast iron during solidification. Ductile iron has the strength of cast steel, and also has excellent corrosion 

resistance of cast iron, that is to say, strength, toughness and wear resistance are both taken into consideration, and the cost is low. Therefore, it can be used to manufacture 

parts with large force and certain impact and vibration, such as crankshafts, connecting rods, camshafts, various gears, machine tool spindles, worms, worm gears, rolling mill 

rolls, large gears and large hydraulic presses. Working cylinders, cylinder liners, pistons, and pressure valves, machine bases, automobile wheels, axle housings, etc.