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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In neutron, X-ray and gamma ray optics, a tungsten alloy collimator is a device that filters a stream of rays so that only those traveling parallel to a specified direction are allowed through. Tungsten alloy collimator is used in neutron, X-ray, and gamma-ray optics because it is not yet possible to focus radiation with such short wavelengths into an image through the use of lenses as is routine with electromagnetic radiation at optical or near-optical wavelengths. Tungsten alloy collimator is also used with radiation detectors in nuclear power stations for monitoring sources of radioactivity.

For industrial radiography using gamma radiation sources such as Iridium-192 or Cobalt-60, a tungsten alloy collimator allows the radiographer to control the exposure of radiation to expose a film and create a radiographic "negative", a.k.a., a radiograph, to inspect materials for defects. A tungsten alloy collimator in this instance is most commonly made out of tungsten, and is rated according to how many half value layers it contains, i.e., how many times it reduces undesirable radiation by half. For instance, the thinnest walls on the sides of a 4 HVL tungsten collimator 0.52" thick will reduce the intensity of radiation passing through them by 88.5%. The shape of these collimators allows the radiographer to direct the radiation to the film and away from other workers.

Therefore, tungsten alloy products for collimators are widely used in linear accelerators used for radiotherapy treatments. They help to shape the beam of radiation emerging from the machine, they can limit the maximum field size of a beam. The treatment head of a linear accelerator consists of both a primary and secondary collimator. The primary collimator is positioned after the electron beam has reached a vertical orientation. When using photons, it is placed after the beam has passed through the X-ray target. The secondary collimator is positioned after either a flattening filter (for photon therapy) or a scattering foil (for electron therapy). The secondary collimator consists of two jaws which can be moved to either enlarge or minimize the size of the treatment field.



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Tungsten nylon is the best material of radiation shielding instead of lead because tungsten nylon has the good properties of tungsten that is high density, high radiation resistance and the properties of nylon that is easily machined, high tensile strength and malleable, etc. Nylon tungsten is more durable than other lead substitutes and offers better radiation shielding capabilities in electronic and electrical products.

Because tungsten nylon is malleable, tungsten nylon offers increased design flexibility and the opportunity to create molded parts in lieu of multi-part assemblies. As tungsten nylon is non-toxic and environmentally friendly, tungsten nylon is the first choice to make radiation shielding which is widely used in medical areas such as tungsten collimator and industry areas. Tungsten collimator is a kind of tungsten nylon product.


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Tungsten plastic makes an important contribution in our daily life, especially in radiation shielding areas. Tungsten plastic contains tungsten and plastic, it has the advantage of tungsten such as good radiation resistance, high density, etc. through extrusion technology, and adding plastic in tungsten, tungsten plastic also has advantages of plastic, such as low cost, higher ductility.

Instead of lead tungsten plastic is a better material to make radiation shielding, because tungsten plastic is non-toxic and environmentally friendly material.


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Geologging which is known as wireline logging and borehole logging is an exploration technique used in the oil and gas industries. A gamma ray source is lowered into a borehole and the radiation penetrates the rock strata. Tungsten alloy radiation shielding can help you to overcome the problem.

This data can then be analysed to determine whether deposits of gas or oil are present. Tungsten alloy radiation shielding is used to shield the radioactive source and to act as a collimator for the gamma beam. Tungsten alloy is the best material for radiation shielding because the properties of tungsten alloy that is high density, small volume, good radiation resistance, etc.


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Tungsten alloy multileaf collimator is widely used in radiology departments and are an integral part of radiotherapy. Tungsten alloy also named tungsten heavy alloy is the best material to make tungsten alloy multileaf collimator for it has the so many good properties, such as high density, small volume, high radiation absorption, high temperature resistant and so on.

Tungsten alloy multileaf collimator is used in a variety of diagnostic and therapeutic medical technologies. High-density alloys for multileaf collimators are used to comprise the individual leaves, which can move independently in and out of the path of a particle beam. This crucial device directs a beam and focuses radiotherapy treatment to precisely conformed shapes, delivering correct therapy doses to patients.


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With the development of our daily life, more and more high technologies are used by people, including computer tomography used in medical. The computer tomography is a medical instrument which produces 3-dimensional X-ray images of the area in question. Several X-ray tubes are contained. In such an X-ray tube we find an electron gun whose electrode is made of tungsten and furthermore a rotating anode also made of tungsten or a tungsten-rhenium alloy.

The shielding of the whole machine is done by tungsten alloy radiation cover (as a replacement for lead, which was used in earlier days). Tungsten alloy has the property of high radiation absorption, so it is the best material to make radiation shielding, tungsten alloy radiation cover is better than the radiation shielding made of lead for it is non-toxic. Tungsten alloy radiation cover is widely used in medical area to protect us from computer tomography radiation.


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Surface state of tungsten bar:
Any oxidation, contamination, and severe excessive fusion, bubbling, delamination, or crack is not allowed for product W1. Camber should be no more than 10mm. Any excessive fusion, bubble, delamination, crack, surface bulky crystallization or severe oxidation &contamination are not allowed for products W2 and W3. The length of the spalls should not be more than 8mm, width no more than 3mm, depth no more than 1mm; The diameter of mechanical pitting should not be more than 1mm, depth no more than 0.5mm; Camber should be no more than 4mm. Any oxidation or contamination is not allowed for product w4. The cartridge of the vertical sintering part should be cut off, and the section is not allowed to be loose or intermingled.

Physical property of tungsten bar:
The density for W2, W3 tungsten bars is more than 17.5g/cm3. Measured data for the section grain size of W2, W3 can be provided.


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Grade of tungsten bar:
In reference to different chemical components and applying requirement, the grades of products are divided into four categories:W1, W2 ,W3,W4.

Appearance of tungsten bar:
The appearance of tungsten bar turns to be metallically gray or dark gray. Hygroscopy is not allowed on the appearance of W1 ,W2, and W3 tungsten bars.


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