Lid for Graphite Crucible Features of Lid for Graphite Crucible Made from high-density fine grain graphite. Perfect for gold silver melting then casting or as a graphite crucible melting non-ferrous metals analysis. Graphite Indicator of Graphite Crucible The bulk density is more than or equal to 1.82 g/cm3. The Electric resistivity is more than or equal to 9 μ Ω m. The Bending strength is more than or equal to Mpa. The resist compression is more than or equal to 65 Mpa. Ash is more than or equal to 0.1 %. The particle is less than or equal to 43 um(0.043 mm).