Tungsten has the highest melting point of any pure metal at 6170°F (3410°C), while lead melted at 621.43 °F (327.46 °C), which make tungsten rod of value in a variety of high temperature products and processes. Among them are glass-to-metal seal parts and support parts for lighting and electronics, silicon rectifier stud mounts and high temperature furnace components.

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Unlike lead, tungsten is not toxic, so it can be used in numerous applications.

Lead has already been phased out of kids’ toys, electronics, and electrical equipment because it interferes with a variety of body processes and is toxic to many organs and tissues including the heart, bones, intestines, kidneys, reproductive and nervous systems, therefore particularly toxic to children, causing potentially permanent learning and behavior disorders. New regulations for lead paint removal go into effect in April 2010. At some point all lead use will be phased out, so why not get a jump on finding environmentally-friendly lead alternatives, like tungsten?

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Tungsten comes in many alloys from a machinable alloy to a diamond-hard one. The alloy can be tailored to each specific application. The hardness and density of tungsten are applied in obtaining heavy metal alloys. A good example is high speed steel, which can contain as much as 18% tungsten. Tungsten's high melting point makes tungsten a good material for applications like rocket nozzles, for example in the UGM-27 Polaris submarine-launched ballistic missile. Superalloys containing tungsten are used in turbine blades and wear-resistant parts and coatings.

Tungsten Carbide is the choice to provide the best protection available for extreme wear and impact. It wears up to 100 times longer than steel in conditions including abrasion, erosion and galling. Wear resistance of tungsten carbide is better than that of wear-resistance tool steels. Wear resistance and heat resistance are just two of hundreds of suitable applications. It can offer wear life in excess of 5 times that of alumina ceramic and has ability for continuous operation a temperatures up to 900 degrees F (480 C). It can also be machined to very tight tolerances and to fine surface finishes as needed. WC is used to make wear-resistant abrasives and cutters and knives for drills, circular saws, milling and turning tools used by the metalworking, woodworking, mining, petroleum and construction industries and accounts for about 60% of current tungsten consumption. The jewelry industry makes rings of sintered tungsten carbide, tungsten carbide/metal composites, and also metallic tungsten. Because of tungsten carbide's hardness, rings made of this material are extremely abrasion resistant, and will hold a burnished finish longer than rings made of metallic tungsten. 

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Lead has a density of about 11.34 g/cm3, but with tungsten, you can achieve densities of up to 19.25 g/cm3, almost two times the density of lead, comparable to that of uranium (18.9 g/cm3) and gold (19.30 g/cm3). 

Higher density means smaller parts for the same weight, so tungsten is widely used in many areas such high-performance engine in battle plane、armor piercing bullet 、 shrapnel pits、counterweight in racing car、fishing sinker、 sailing boat、radiation shielding and so on.

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
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