The tungsten bars with the purity of 99.999% are mainly used as materials for high standard bearing steels, automobiles, high-speed railways, high precision equipment, and high-tech weapons. The tungsten bars with the purity of 99.99% are mainly used in alloy tool steel, high-quality clean steel, and special high-performance steel, etc. The tungsten bars with a purity of 99.95% are used primarily to cast raw materials for ingredients and forging special steel and drawn steel wires. Besides, it is widely applied in the high-temperature furnace, vacuum furnace, and sapphire crystal furnace. Tungsten bar is also used to make guns, artillery rockets, satellite airplanes, and ships.