What Is Tungsten Bar?

Tungsten is a rare metal, after mining, rubbing, water re-election, refining and other processes, wolfram ore would be make into a purity of 60% or 90% of the tungsten powder, and then to refining it into the shape of the finished product with high-temperature electric resistance furnace, that is tungsten bar. Its melting point is about 3500 ℃. Pure tungsten is a natural metal mined from the earth. At present, China and Russia are the biggest countries of tungsten ore reserves of tungsten resources in many countries. Generally speaking, it should be a purity of 99.95% or more, and manufactures must issue an inspection report analysis and testing authorities, such as: analysis test report of national nonferrous metals electronic material analysis and testing center, or worldwide recognized Societe Generale de Surveillance (SGS). Wolfram bar may also be referred to tungsten, which has a high hardness after quenching and tempering, and has wear-resisting property. In high temperature conditions, it is also able to maintain the good performance. Therefore, wolfram bar is mainly used in the tool head processing, tungsten wire for lighting equipment and various thermal conductors. What’s more, it can used for making crank axle of advanced automobile, ingredients of cylinder, and a variety ingredients of special steel casting. In addition, tungsten bar is also widely applied in manufacturing guns, artillery, rockets, satellites, aircraft, ship, jewelry and other fashionable accessories.

According to the GB / T 3459-2006 "tungsten" requirement in November 1, 2006 of state. The dimensions of tungsten square bars include: TW-2: (10-16) mm * (10-16) mm * (> = 300) mm; TW-1, TW-4: (10-16) mm * (10-16 ) mm * (> = 30) mm. The dimensions tungsten round bars include: TW-2: (16-30) mm * (> = 300) mm, curvature cannot be greater than 4mm; TW-1, TW-4: (16-30) mm * (> = 30) mm. On the other hand, the ways for packaging of these types of products also have the relevant provisions. Under normal circumstances, each of them is about 1000g. Generally, the package of them can be divided into small packages and large packages. Small package usually uses cartons or plastic boxes, packing in kg is about seven to a box. Large package uses wooden cases, counting for 300, 000 kilograms, generally 5 boxes in a carton. The weight of each carton of international shipping limit 50KG and the domestic transport is 25KG.

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