... (MPa) ≥30≥ 35Particle MAX(mm )0.80.8MATERIAL: Extruded Graphite,Molded Graphite,Isostatic Graphite,Vibration Graphite,High density and ... Strength graphite material . (Die molded graphite),High pure extruded graphite,Special carburizing treatment graphite materialCHARACTERISTIC :1.perfect sealing ... coefficient of thermal expansion , minimal wettability to molten metals Extruded graphite rods and blocks