Tungsten Carbide has only recently been used in the fashioning of jewelry due to its hypoallergenic nature and the fact that due to its extreme hardness it is not apt to lose its luster like other polished metals. In fact, a ring or bracelet made from Tungsten Carbide will never need polishing and it is virtually scratchproof...only another item with a diamond or diamond surface or a special sapphire in it can scratch tungsten jewelry. Carefree Tungsten Carbide is made without the use of any Cobalt additive and not just anyone can make a piece of Tungsten Carbide jewelry. In order to manufacture a perfectly crafted piece of jewelry, it takes skill that only a few companies have mastered. It cannot be made in someoneÕs garage with a lathe and a machinist.

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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Pure tungsten, that is, before alloying with any other material, is steel-gray to tin-white and is a very hard element. Tungsten can be cut with a hacksaw when it is very pure (it is brittle and hard to work when impure) and is otherwise worked by forging, drawing, or extruding. This element has the highest melting point (3422 ¡C) (6192 ¡F), lowest vapor pressure and the highest tensile strength at temperatures above 1650 ¡C (3000 ¡F) of all metals. Its corrosion resistance is excellent and any attack by a mineral acid is virtually imperceptible. Tungsten metal forms a protective oxide when exposed to air but can be oxidized at high temperature. When alloyed in small quantities with steel, it greatly increases its hardness.

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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Tungsten has the highest melting point and boiling point of all the elements, melting at 3,420 degrees C or 6,700 degrees F, and boiling at 5,700 degrees C and 10,300 degrees F. What this means to the average person is that on the surface of the Sun, Tungsten would become liquid, but if you dropped a piece of Tungsten from outer space, it would enter the EarthÕs atmosphere, heat up and glow to red color, and still hit the Earth in a solid piece.

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
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Like gold, silver and platinum, Tungsten is an element #74. It is naturally occurring and is one of the main elements responsible for the development of human civilization. Without tungsten, we would not have the incandescent light bulb as the filament inside the bulb is tungsten and has the toughness and resilience exceeding any other metal. In 1922 the Germans developed Tungsten Carbide as the material used in making better cutting tool bits for precision milling and cutting of steel. In World War II, tungsten played an enormous role in background political dealings. Portugal, as the main European source of the element, was put under pressure from both sides, because of its sources of wolframite ore. The resistance to high temperatures, as well as the extreme strength of its alloys, made the metal into a very important raw material for the weaponry industry.

Today tungsten carbide is in widespread use in the worldwide machinery of modern industry and is a darling super alloy that has made aerospace advances possible. And it is still the one little item that makes a light bulb work.

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