Tungsten, tungsten rod, tungsten band, tungsten powder, tungsten 

 Long-term supply of imports of tungsten, tungsten rod, tungsten band, tungsten powder, tungsten, tungsten carbide powder, molybdenum and tungsten alloys, tungsten, tungsten ingots, symbol: W; color: dark gray; boiling point: 5555, tungsten was silver white, its melting point up to 3400 ℃, is the highest melting point metal. Density of 19.3 g / cm 3, 2.5 times that of steel, and gold quite. Good electrical conductivity of tungsten, the electrical conductivity higher than that of nickel, iron, phosphor bronze and platinum. Expansion coefficient of tungsten is also smaller. Tungsten is stable at room temperature, the temperature is not high, brown and dark blue surface of the oxide film at higher temperatures, the oxide of tungsten trioxide generated intense. 超过 2000 ℃, the tungsten and tungsten nitride nitrogen reaction. Tungsten with hydrogen does not work, tungsten and carbon at high temperature gases and some carbon reaction has important industrial value of hard refractory carbides. Good corrosion resistance of tungsten at room temperature, with any concentration of acid and alkali are not working, but it can quickly dissolve in the mixture of hydrofluoric acid and concentrated nitric acid, in the oxidation of dissolved salts (such as sodium nitrate, etc.) will be severe corrosion. Major minerals are wolframite and scheelite two. Price below the market price, quality and acceptance by national standards. I am only responsible for the delivery, please contact us.