During, we heat the pig iron until it is liquefied. Then we pour the melting iron into sand mold for gray iron casting. We can use the grey iron pieces in many industries like machine industries. Because the gray iron casting finished products has a good machinability property that we can use it to assemble and process easily in machine industry.
We also can add manganese with a reasonable ratio into the gray iron casting progress. So that we can get a good gray iron casting finished products with a high strength and also can have a high density property. Grey iron has a wide application in machine industries and other industries.
With graphite element inside, the gray iron casting finished pieces look like grey color. So that we name this kind of iron grey cast iron. Gray iron casting products with graphitic structure has some properties which are different from other kind of cast iron. Gray iron casting pieces has a reasonable compressive strength we can use it to make some kind of building material. Also we can use the grey cast iron to make the machine foundation section. So gray iron casting is important in machine manufacturing industry.