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Uranium-238 , also known as ²³⁸U or U-238, is the most common isotope of uranium found in nature. It has high hardness, ductility, toughness and other excellent physical properties. The density of uranium-238 of 19.1g / cm³ makes it achieve the demand of penetrator core for heavy metal material, and greatly enhances the strength of armor-piercing, so it is often used as depleted uranium bombs or armor plates in the military. Moreover, uranium-238 is widely used as a counterweight of aircraft and nuclear reactor fuels.Uranium-238 is an alpha emitter that has a half-life of 4.4 billion years. The rays released by it can enter into the human body to destroy DNA inside cells. Tungsten radiation shielding for uranium-238 is usually used to shield the radiation generated by uranium-238.

Around 99.284% of natural uranium is uranium-238. Reprocessed uranium is also mainly uranium-238, with about as much uranium-235 as natural uranium, a comparable proportion of uranium-236, and much smaller amounts of other isotopes of uranium such as uranium-234, uranium-233, and uranium-232. Uranium-238 can become fissile plutonium-239 by capturing a slow neutron and after two beta decays. It is regarded as a toxic metal because its radiation could harm many body organs such as liver, kidney, heart and brain. And its residue can long-term damage and pollute the environment to lead to human in the environment to suffer from skin cancer and leukemia. It has been found in the study of artificial cell cultures and laboratory animals, the chronic effects of uranium-238 may cause genetic diseases, neurological diseases, leukemia and other diseases.

Tungsten radiation shielding for uranium-238 is a tungsten alloy radiation shielding for shielding radiation produced by uranium-238. Its high density decides it can shield and absorb rays in a high degree. Compared to traditional radiation shielding materials(such as lead), tungsten alloy radiation shielding provide 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. And tungsten alloy will not pollute the environment.