Grade: YF10 Density :14.80-15.10 bending Jeon: 1880 Hardness: 92.5 Usage: suitable for cast iron, non-ferrous metals and low alloy steel, semi-finishing and graphite brake pads aspects of new materials processing. Tungsten steel cylinders: for itself with the pilot hole, so lighter weight than solid material, thus reducing material costs, but also reduce the time of wire cutting, perforated material relative to the solid material, not pore discharge, processed threading hole, eliminating the need for an increase in the discharge process to increase the internal stress, thus affecting the performance of tungsten steel.