... thermal conductivity and low resistivity. graphite block,graphite material,graphite ,ultrafine grain graphite ultrafine grain graphite with the average granulity 16μm ... board and precision mould. 7.good for EDM graphite electrode, 8.providing faster discharging ability 9. ... current.Specification of products:Physical properties of ultrafine grain graphite material: ModelAverage grain size(μm)Density≥ (g/ ...