... materials and different specification casting products... Gray iron: with good wear resisting and shock resisting, the ... heat treatment is not needed. Gray iron is easy to cut process, used evanescent modes ... of equipment (tool, motor, metallurgy, shipbuilding, spaceflight parts, pump, valve.packing: wooden case, wooden pallet, steel ... .material: HT150 HT200 HT250 HT300 Grey Cast IronGG30