Manufacturing guns nozzle can be used as in the arms industry. Boron carbide is easier to manufacture than the elemental boron and the price is relatively cheap, its largest use is in the military industry. The boron carbide can also be used as warships and helicopters ceramic coating, its light weight and has a the resist the penetrator penetration thermocompression coating into the capacity of the overall anti layer. Can also be used for grinding, grinding, drilling and polishing, metal boride carbide precious stones and other hard materials manufacturing and smelting boron steel and boron alloy and special welding. Boron carbide nozzles characteristics: Has the performance boron carbide same, extremely hard and wear-resistant, does not react with the acid resistance, high / low temperature, high pressure, density ≥ 2.46g/cm3; the microhardness ≥ 3500kgf/mm2, bending strength ≥ 400Mpa The melting point of 2450 ℃. Due to the characteristics of the above boron carbide nozzle having wear-resistant high hardness, boron carbide blasting nozzles will gradually replace known carbide / tungsten steel and silicon carbide, silicon nitride, alumina, zirconia, and other materials of the nozzles .