... to OIL FIELD, MARINE, MINING ect.1. Material: ASTM C-13622.Process: Resin sand , Gravity pouring;3. Dimensions: O.D ... 5. The annual productions are over 2000 tons. ProductIntroduction1. Material:Ductile cast iron: QT400-15, QT450-10, QT500-7, ... and satisfactory of service,4. Punctual delivery time; Currently material for other castings: categoryExamplesCarbon steels 1020, 1030, 1040, 1050Low alloy ...