Depleted uranium is still used by the United States, Great Britain, Russia, and France, among other nations. Raw material costs are lower with DU than with tungsten, and DU is also easier to melt and shape. In addition, DU is a pyrophoric compound; it ignites on contact with armour, a quality that tungsten carbide does not possess.
However, pure depleted uranium is softer than tungsten and thus has to be alloyed with other metals, such as titanium; on the other hand, tungsten carbide is one of the hardest materials known to man. Still, DU is cheaper, easier to work, and incendiary.