Tungsten alloys has excellent radiation attenuation properties, allowing the thickness of shields to be reduced, while still effectively blocking harmful X-ray and gamma radiation.

Radiation is an effective tool within medicine for both diagnostics and treatment of patients. Techniques such as SPECT and PET utilise radioactive materials injected into the patient, which are then monitored by gamma cameras (SPECT) or scanners (PET) to detect the presence of tumours in the body.

One of the commonly used radioactive materials in nuclear medicine is technetium 99 (Tc99). This is produced in a tungsten Tc99 generator, which contains a radioactive core, loaded with molybdenum 99 which decays to produce Tc99. This is mixed with sodium chloride and other chemicals before being injected into patients. The tungsten provides protection to the clinical staff handling the Tc99generator.

In external radiotherapy tungsten multi-leaf collimators can accurately focus beams of radiation to target cancerous cells. In internal methods such as brachytherapy radioactive seeds can be implanted directly into a tumour.  Prior to delivery, the seeds are held in a Wolfmet tungsten safe to protect medical staff from the radiation.

For all these methods there is a need to carefully control the emission of radiation; to protect those working with potentially harmful isotopes and to ensure that treatments effectively kill off cancerous cells, without harming healthy tissue.


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Tungsten eye fishing sinkers with two eyes resemble rubber core fishing sinkers while there is no groove through the centre. These are mostly used on boats for mooching rigs or trolling lures. However, it can work similarly from piers or shore. In most cases, it's a good way to get a lure out farther on windy days, and the extra weight will suspend the lure closer to the bottom when in the choppy water. What is more, it is more aerodynamic and you can cast to the distance as you willing to.

Tungsten eye fishing sinkers with one eye pretty like the two eye ones, but one eye fishing sinkers only have one eye. One eye fishing sinker, also known as a torpedo, is a great sinker for windy days, probably the best casting sinker of them. It holds bottom terribly, however, and can hang up just as badly as the other.

But it is a good sinker to use with a sliding sleeve because it lifts the slider off the bottom enough to facilitate the smooth movement of the leader line.

Just like the rubber core fishing sinkers, tungsten eye fishing sinkers are generally made of lead before. And now, the environment protection material tungsten based alloy has an enthusiastic reaction because the lead is commonly labeled environment hazard.





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2. Specifications (mm)

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Tungsten rubber core fishing sinkers have a groove like a split shot and two tabs also called ears on each end of the sinker. Rubber core tungsten fishing sinkers resemble the oval and American football shape .The line is placed in the centre groove, and the tabs are for fixing the line in place by twisting the line in opposite directions, finally wrapping the line around the rubber core. If you want to release the line, just twist the two tabs in reverse. Rubber core fishing sinkers can quickly be added or removed and do not brake the line.

Rubber core fishing sinkers have many applications. The common applications is using a small 1/8 ounce version for live bait offerings, or adding a large sinker when trolling long-lines to help baits run at greater depths.

Lead is widely used as the materials for this type of tungsten fishing sinkers. However, there are more and more alternatives come out because of its toxic property. The environmental friendly materials tungsten alloys are more widely used. As the high density of tungsten alloy, tungsten alloy rubber core fishing sinkers are about 30 percent smaller than lead ones. So that it is delighting to achieve desired weight with a small volume.




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In order to target radiation precisely to the diseased tissue, it is necessary to use multileaf collimators.

First of all, X-ray images are produced to determine the precise position and outline of the tumor. Following this 3-dimensional measurement, an electric motor moves each individual leaf in the collimator to the correct position – with up to 120 leaves being used to shape the outline of the tumor with millimeter accuracy. Then, the tumor is exposed to high energy radiation. During this process, the tumor is radiated by turning the gantry with the multileaf collimator 360° around the patient. To protect the surrounding healthy tissue, a highly precise multileaf collimator is necessary. To protect the environment from unwanted radiation, different shielding parts are widely used.


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Applications of tungsten  alloy include collimators for the medical industry, shielding blocks, oil well logging tools and instrumentation and nuclear equipment.

Tungsten alloy is an excellent material for use in radiation shielding (high energy photonic). and they are most popularly used for this application. These alloys are excellent materials for shielding and collimation due to their combination of radiographic density, machinability, strength, and low toxicity. Tungsten Heavy Alloy offers a superior protection level to lead in an equivalent thickness and, unlike lead, resists deformation and can be accurately fastened.


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