... GOOD PROPERTIES: High purity, fine grain, good performance of electrical conductivity and thermal conductivity, high density, good ... permeability, chemical stability. Small coefficient of thermal expansion, etc.3.WIDE APPLICATION: For high vacuum furnace,mechanical industry,chemical ... : 68MPaAsh: 0.1% maximum5.PHOTOS: GRAPHITE,GRAPHITE ROD High purity impregnated graphite rod for industrial furnace