1. Grey iron casting railway parts are cheaper than almost all other types of cast iron. In addition, grey iron casting railway parts have good ductility, strength (mainly compressive strength) and impact resistance. 2. Because our ductile iron casting parts can withstand impact well, they can be machined. Our ductile iron casting parts can withstand additional post-casting operations such as drilling, cutting and surface treatment. For example, when making underground pipes from ductile iron, manufacturers often apply a coating. 3. If you need Iron casting railway parts made of other materials, we can customize the production for you.