The turrets were mounted on armored barbettes protected with of armor plating. The supporting barbettes had the of armor plating. Weight reduction was also accomplished by removal of gun turrets and armor plating. Weight reduction was accomplished by removal of all gun turrets and armor plating. The conning tower was protected by of armor plating. An armor-piercing shell must withstand the shock of punching through armor plating. The supporting barbettes had the of armor plating, reduced to . The conning tower was protected with thick armor plating. The main battery turrets had of armor plating. The armor-piercing round weighed and could penetrate five inches of armor plating at . The conning tower and main battery turrets were protected with worth of armor plating. Vanadium alloys are used in springs, tools, jet engines, armor plating, and nuclear reactors. Most lacked self-sealing tanks and armor plating. Nodosaurs were also present, although less likely to be hunted due to their armor plating. Depleted uranium (U) is used in kinetic energy penetrators and armor plating.