Tungsten alloy is used for shielding against X-ray in medical. With the development of radiation shielding for X-ray equipment, especially constantly carrying out radiation shielding and safety regulation or standard, awareness of radiation shielding is strengthened in generally. Now accidents caused by X-ray are few. However, in the past, if did not notice intermittent exposure to control irradiation of X-ray, it may cause radiation injury to the skin of patient and medical staffs’ hands when utilizing fluoroscopic viewing to carry out fracture reduction and searching foreign matter inside body. At the beginning of 1980’s, one hospital in China used 10mA portable X-ray equipment which had low effectiveness of shielding to search the bullet in buttock of a child who shot by air pistol. Medical staffs were lack of knowledge about radiation shielding and time of fluoroscopic viewing was too long. That caused II~III degree acute radiation burning accident to part skin of child. The child accepted symptomatic treatment in hospital for several moths and also needed skin grafting after half a year. It also happened that medical staffs could not control fluoroscopic viewing time, resulting in over irradiation of X-ray to medical staffs’ hands and radiation injury when carrying out fracture reduction and searching foreign matter inside body.

Traditionally, lead was used as raw material for radiation shielding. However, lead had toxicity which may cause pollution. The density of tungsten alloy is higher than lead by 60%. High density of tungsten alloy allows a reduction in physical sizes of shielding components without compromising effectiveness of shielding characteristic. Otherwise, tungsten alloy has the advantage of non-toxicity. Tungsten alloy is suitable for radiation shielding.



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Tungsten is a very unique metal with very unique characteristics. Tungsten is a very heavy metal. In fact, tungsten derives its name from the Swedish words tung and sten, which means “heavy stone”. In terms of weight compared to lead, a cubic inch of lead weighs half as much as a cubic inch of tungsten. Just to put in as a perspective, a cubic inch of lead weighs about six and a half ounces (a little less than half a pound).

Much has been said about tungsten’s toughness and high durability, but it is also pretty brittle. In fact, it is possible to cut a piece of with a hacksaw. Some tungsten wedding bands have been known to break if dropped from a fairly high distance. Nonetheless, tungsten carbide is still one of the toughest and strongest of all metals known to man.

One of tungsten’s most amazing characteristics comes from its ability to withstand heat. With the exception of carbon, tungsten has the highest melting point of all elements. Tungsten has a melting point (the point where it changes from a solid to a liquid) of 6,152 degrees Fahrenheit (3,410 degrees Celsius). At 4,982 degrees Fahrenheit, another “tough” metal – Iron – is already boiling. At high temperatures, tungsten keeps its profound strength and does not begin to expand nearly as much as other metals. Because of its ability to remain strong under high temperatures, tungsten is used in space travel.

Another interesting characteristic of tungsten is that it does not react with many other substances including acids. Tungsten is resistant to most acids, which also aids in the jewelry industry. The lack of reaction with acids and other elements prevents your finger from turning green.



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Tungsten alloy collimator is widely used for radiotherapy. In China, radiotherapy was begun in 1930’s. Radium Hospital (Fudan University Shanghai Cancer Center), build in 1931 and Peking Union Medical College Hospital (having 200mg radium needle, a 200kV X-ray therapy apparatus and a 120kV X-ray therapy apparatus), build in 1932, were the first hospitals launching the earliest radiotherapy in China. At the end of 1950’s, China imported the first ⁶⁰Co therapy apparatus, high energy ray device. China imported the first betatron in 1968 and the first liner accelerator in 1975. In recent years, radiotherapy has developed unprecedentedly. All of new radiotherapy techniques are developed including three-dimensional stereotactic radiotherapy (gamma knife, X-ray knife, conformal therapy and intensity modulated radiotherapy). Researches on tumor radio physics and radio biology also achieve fruitful results. In recent years, hospitals adding radiotherapy in every province, city, prefecture-level city, county-level city even small towns are more and more. Radiotherapy equipments are more and more advanced.

Tungsten alloy collimator is used for guiding X-ray to protect patients and doctors from radiation. Density of tungsten alloy is higher than lead by 60%. The high density allows a reduction in physical sizes of collimator without compromising effectiveness of shielding characteristics. Otherwise, tungsten alloy has the advantage of non-toxicity. So tungsten alloy is more suitable for collimator, compared with lead.


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The high proportion of raw materials for production to clean the metal tungsten alloy counterweight block is pollution-free, in line with international environmental standards, proportion (> 18g/cm3), small size. Therefore, resistance to strong winds, light into the water, sinking fast, and sinker the best alternative to products sold in Europe and other developed countries.

Tungsten alloy counterweight block including: tungsten alloy golf weight, car weight of tungsten alloys, tungsten alloys and fishery pendant with heavy tungsten alloy ship weight, tungsten alloy aircraft weight and so on.


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Metal Injection Molding (MIM) is a growth technology for manufacturing complex-shaped,high-volume metal or alloy parts. Metal Injection Molding (MIM) parts can be produced from ferrous and non-ferrous metals and alloys.

The advantages of Metal Injection Molding (MIM)
Density: Typically 95-98% of wrought material. Mechanical Properties - Comparable to wrought alloys of similar composition. Complexity - Geometries comparable to plastic injection molding. Surface Finish: As processed, 32 ram or better. Corrosion Resistance - Comparable to wrought alloys of similar composition. Alloy Selection - Many ferrous, nickel-based and copper-based alloys available.


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Tungsten fishing weight is an ideal, environment-friendly alternative to lead weight, which are toxic and increasingly being labeled an environmental hazard.

As the high density of tungsten, the tungsten fishing weight makes your fishing easier. It is extremely sensitive and can actually help you "feel" what the bottom is made of and what your bait is bumping into, such as brush, rocks, mud, etc.


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Tungsten alloy fishing weight has many advantages such as high density with small volume, good corrosion resistance, perfect hardness,etc.

High density make tungsten alloy fishing weight smaller than the conventional lead fishing weight. It will be hung up far less with a tungsten sinker than with a lead sinker because of its smaller size.


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Tungsten alloy bar has the good properties of high density with small volume, perfect hardness, non-toxic and environmentally friendly, so it is widely used as counterweight.

Followings are physical properties of tungsten alloy bar:
1, Width×Length: (2.0-100.0mm)×(2.0-100.0mm)
2, High: 50-1000mm
3, Density: 15.8-18.75 g/cm3
4, W content: 85-99%
5, Composition: W-Ni-Fe, W-Ni-Cu



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Tungsten alloy fishing weight has so many good properties.

Tungsten alloy fishing weight is small size and large proportion (> 18g/cc). They are against strong wind, light into the water, sinking fast, and are the best alternative to lead sinkers. Compared to lead fishing weight tungsten alloy fishing weight is non-toxic and environmentally friendly, so it is best-selling in Europe, the United States and other developed countries.


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The most common packaging for Tungs-tone needles was a tin box that holds eight needles. The tins came later. When the "Tungs-tone" was introduced in 1916, the needles came in a punch-out card. The earliest ad I have seen for this new Victor product is from June 1916. There was trouble over the name when it was registered with the Patent Office, we learn from the August 15, 1916 issue of Talking Machine World. An article states, "The word was rejected by the United States Examiner of Trade-Marks at Washington until he was instructed from the office of the United States Commissioner of Patents to rule differently." The trade-mark examiner felt "Tungs-tone" was too close to "tungsten." In a similar ruling, "Tungsteel" was judged no good for razors and pocket knives. Anyway, Victor was allowed to use the name, and early ads always use a capital letter (Tungs-tone, not tungs-tone), giving the product more dignity.

A Tungsten or Tungs-Tone is a type of phonograph stylus. They are constructed from tungsten wire, which is held in a metal shank. Unlike a steel stylus, a tungsten stylus has a cylindrical rather than a conical shape, meaning that the cross-section of the stylus remains the same as the stylus wears down, which in turn means that tungsten styluses may be used for several plays.

Typically, a new steel needle is required for every record played on an old acoustic phonograph. This is because the record contains abrasive material. In the first few silent tracks this abrasion hones the steel needle to a profile that tracks the grooves properly. The needle continues to wear as it plays the record, so that by the end its diameter has increased to the point where the sharp edges may damage the grooves on subsequent plays.


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