Tungsten and tungsten heavy alloy in metallic form and tungsten compounds are used in various forms of tungsten heavy alloy radiation shielding. Their high densities meet the primary requirement of a tungsten heavy alloy radiation shielding material and in certain tungsten radiation shielding application, tungsten's high atomic number is also important. The ease with which tungsten can be worked is of added value.

The tungsten heavy alloy radiation shielding of containers for radioactive materials is usually metallic tungsten. Radioactive materials in laboratories and hospitals are usually handled by remote control from a position of safety behind a wall of tungsten bricks and X-ray machines are normally installed in rooms lined with sheet tungsten.


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Compared to traditional radiation shielding materials such as lead and boron carbide, tungsten funnel shielding provides excellent density with small capacity. At the same weights high density alloy can provide the same energy absorption as lead using 1/3 less material.

During design of tungsten funnel shielding, tungsten funnel shielding is calculated according to requirements of shield to abate the multiple shielding materials' thickness.



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Tungsten metal is a grayish-white lustrous metal that is often brittle and hard to work. Of all metals in pure form, tungsten has highest melting point of all elements except carbon - vary between 3387°C and 3422°C. It also has good thermal and electrical conductivity. Its electrical conductivity at 0°C is about 28% of that of silver which itself has the highest conductivity of all metals. In addition, it has low vapor pressure at high temperatures.

Such properties make tungsten metal a high performance material in high temperature products and processes. Tungsten metal powder is used as a filler material in plastic composites, which are used as a nontoxic substitute for lead in bullets, shot, and radiation shields.



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Tungsten alloy collimator shielding is a device that narrows a beam of particles or waves. It belongs to input and output element of optical fiber communicaiton devices. It can be adopted as linear accelerator and cyclotron in medical treatment.

Tungsten alloy collimator shielding has a simple structure, through which the fiber radiate light can be converted into parallel light (gaussian beam). So its main fuction is to efficiently maximize the light coupling into the devic.


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As the continuously developing medical technology, the medical radiations generated in medical process have become more and more, which causes problems to medical work. These radiations including X-rays, gamma rays, α rays, β rays, etc.

In order to protect the safety of patients and health care workers, researchers found that there is relationship between radio protective capability and material density. The greater the density, the better the shielding performance. Since the density of tungsten alloy is very high, the shielding performance is excellent.

Tungsten alloy material is a class of alloy including tungsten as a substrate (W content of 85-99%), and adding a Ni, Cu, Co, Mo, Cr and other elements. According to the composition characteristics and application, it is divided into W-Ni-Fe, W-Ni-Cu, W-Co, W-WC-Cu, W-Ag and other major series, and the density is up to 16 .5-19.0g/cm3, which is world known as heavy alloy. Tungsten alloy has strong capability in absorbing radiations, which is 30~40% higher than lead.

Application series of tungsten alloy radiation shielding in medical:
1 .Tungsten alloy Multi-leaf Collimator(MLC)
Thickness: 2.0-3.8mm; plate flatness: 0.05mm;
2 .Tungsten alloy collimator;
3. Tungsten alloy  protection cans - used for medical radiation shielding;
4. Tungsten alloy needle shielding - shielding for medical radioactive liquid;
5. Tungsten alloy memory –cans, boxes or other containers for storing radioactive material.
6. Collimators - for medical linear accelerator and cyclotron;
7. Tungsten alloy containers - for ray shielding on 60Co therapy machine;
8. γ camera tungsten alloy collimator.

Application series of tungsten alloy radiation shielding in nuclear technology:
1. Tungsten alloy collimator for detecting container system;
2. 60Co and tungsten alloy containers of other radiation shielding;
3. Tungsten alloy shielding for γ-ray collimator in geological survey;
4. Tungsten alloy collimator for pipeline inspection ray shielding;
5. Tungsten alloy collimator for industrial inspection of γ-ray shielding

The application of tungsten alloy radiation shielding parts:
• Radioactive source containers
• Gamma radiation shielding
• Shielding Block
• X-ray collimator
• tungsten alloy PET shielding pieces
• Shielding in cancer therapy equipments



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Tungsten alloy plate play important role in manufacturing of collimator for nuclear medicine, nuclear research, geologging and homeland security. These materials provide reliable protection against X-rays and gamma radiation.

Specifications of tungsten alloy plate
Size: Width*Length*Thickness(2.0-250.0mm)*(2.0-250.0mm)*(2mm-15mm)
Density: 15.8-18.50 g/cm3
Composition: W content: 85-97%, W-Ni-Fe, W-Ni-Cu
Surface: Sintering surface, Ground surface


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Tungsten alloy medical radiation shielding is necessary for X-ray diagnosis. Medical radiation shielding of X-ray diagnosis not only reduce individual dose of examinee as far as possible. It also needs to reduce public dose commitment caused by medical radiation. That is why medical attract high attentions from all sectors of the community. Public dose commitment occupies the most origin of artificial ionizing radiation. It has more influence than ash caused by nuclear weapons test. It is also higher than per capita effective dose of the tear caused by global nuclear power or nuclear accident in Chernobyl, the most serious nuclear accident so far, by several orders of magnitude. Medical radiation shielding of x-ray diagnosis is the largest origin artificial ionizing radiation, increasing continuously. So, it is necessary to strengthen optimization of medical radiation shielding when applied frequency is increasing continuously, so that reduce public dose commitment.

Density of tungsten alloy medical radiation shielding is higher twice than lead. The high density of tungsten alloy allows a reduction in physical size of shielding components, without compromising the effectiveness of shielding characteristics. Otherwise, tungsten alloy has the advantage of non-toxicity, compared with lead. So tungsten alloy is ideal for against X-ray.


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Experts find that radiation exposure can be reduced by maximizing shielding. Tungsten alloy radiative shielding materials advantage: high density, small volume, etc. The radiation stopping ability of a material is related to its density. Higher density means better stopping power and shielding. Because of its a higher density, tungsten alloy has much higher radiation absorption ability than lead. Its greater linear attenuation of gamma radiations means that less material is required for equal shielding. Alternatively equal amounts of tungsten alloy radioactive shielding materials provide diminished exposure risks than equivalent lead shielding.

Compared to traditional radiation shielding materials such as lead and boron carbide, tungsten alloy radioactive shielding provides excellent density with small capacity. At the same weights high density alloy can provide the same energy absorption as lead using 1/3 less material. When the weight is certain, more density, and the thickness would be thinner. Tungsten alloy radioactive shielding material could be made with thinner thickness but high absorption of radiation in high density. That is why tungsten alloy radioactive shielding material is poplar to make radiation shielding.


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Lead is quite ineffective for blocking neutron radiation, as neutrons are uncharged and can simply pass through dense materials. Lead free radiation brick materials composed of low atomic number elements are preferable for stopping this type of radiation because lead free radiation bricks have a higher probability of forming cross-sections that will interact with the neutrons. Lead free radiation brick materials are well suited for this task. Lead free radiation brick also named tungsten alloy radiation brick is widely used.

Compounds with a high concentration of hydrogen atoms, such as water, form efficient neutron barriers in addition to being relatively inexpensive shielding substances. However, lead free radiation brick with high density materials can emit gamma rays when blocking neutrons, meaning that lead free radiation brick is most effective when tungsten alloy radiation brick incorporates both high and low atomic number elements.

Tungsten alloy radiation brick products have excellent radiation resistance, electric and thermal conductivity and corrosion resistance coupled with high density (16-18.5g/cm3) and good mechanical strength. Tungsten alloy radiation brick has small coefficient of expansion and large elastic modulus, and tungsten alloy radiation brick is extensively used in military equipment, mechanical manufacturing, aircraft components, medical shields and sports equipment.

Tungsten alloy radiation brick is used in both medical and industrial settings. The energy-absorbing qualities of tungsten alloy radiation brick makes them excellent choices to protect sensitive electronic equipment, as well as delicate human tissue. We deliver X-ray target and stationary anodes for a variety of X-ray applications. Our tungsten alloy radiation brick, lead free radiation brick materials are used worldwide for the assembly of X-ray tubes, and other precise X-ray technology. Tungsten alloy radiation bricks are used in radioactive source containers, gamma radiography, syringe shields, oncology treatment systems and oncology instruments. Tungsten alloy radiation brick, lead free radiation brick provides unsurpassed strength, control and protection.


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Positron emission tomography (PET) is one of the nuclear medicine techniques available for diagnosis. Whilst X-rays provide information on the structure of the body, tungsten PET shields show the chemical function of a particular organism. Tungsten PET shields involve the injection of FDG (a glucose-based radio nuclide) from a shielded syringe into the patient. As the FDG travels through the patient's body it emits gamma radiation, which is detected by a gamma camera, from which the chemical activity within cells and organs can be seen. Any abnormal chemical activity may be a sign that tumors are present. PET scans are frequently used to detect cancerous tumors and diseases of the brain and coronary arteries.

The solid tungsten PET shields dispensing system permits the safe dispensing of high- energy PET radiopharmaceuticals without the need for expensive remote handling systems .The magnetic "docking" feature of the solid tungsten syringe shield into the dispensing pig allows low exposure dose drawing .It is designed with 3.5 cm thick walls and accommodates up to a 30ml vial.

Tungsten PET shields dispensing pig provides a full 3.5 cm of solid tungsten to safely shield high energy PET radiopharmaceuticals. Designed to accommodate 30ml vials (adapters are available for smaller vials).The threaded lid attaches to the body of the pig so that no radiation "shine through" occurs .The tungsten stopper, with attached pull ring ,is held in place magnetically. The handle permits the pig to be easily carried as a transport container as well as a dispensing pig. Weight 43 lbs.

Tungsten PET shields magnetically docks with the PET Dispensing Pig .Designed to accept 3cc and 5cc B-D syringes ,it places the needle inside the vial septum when engaged .The body of the shield is constructed of solid tungsten 2.1cm thick for maximum shielding .The external calibration rod allows the precise volume to be withdrawn without a leaded glass viewing port ,where high exposure levels cannot be adequately shielded .The system allows the plunger to be pulled back with a pair of forceps ,allowing you to keep your exposure ALARA .Weight 5.8 lbs


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