Grade: RCN Metal content: 99.96 impurity content: 0.4 Uses: RCN is corrosion resistant grade for binder, slip ring, building water pumps in the seal ring, the gauge pin, piston, nozzle, pressure parts, laboratory mixing and milling equipment wear parts. 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.