The nation’s military has developed a new alloying technology for antitank shells.

The Defense Acquisition Program Administration said Friday that the Agency for Defense Development has developed a technology that enables it to alloy copper and tungsten.

An official at the defense administration said the new technology has raised the penetration rate of antitank shells by 40 percent, given that existing shells are made solely of copper.

Advanced countries, including the United States, are still in the process of developing the technology to alloy tungsten and copper, which have drastically different compositions.