Composition B

From Wikipedia, the free encyclopedia

Composition B is an explosive consisting of castable mixtures of RDX and TNT as well as, in some instances, additional desensitizing agents. It is used as a burster in artillery projectiles, rockets, land mines, and hand grenades. It was also used for the explosive lenses in the first implosion-type nuclear weapons developed by the United States.

The standard ratio of ingredients (by weight) is 63% RDX and 36% TNT, together with an additional 1% wax to improve handling qualities.

Composition B was extremely common in US and other western nations' munitions and was the standard explosive filler from early World War II until the early 1990s, when less sensitive explosives began to replace it in many weapons systems. Some NATO-approved munitions suppliers such as Mecar have continued to use Composition B in their products.

Composition B is occasionally referred to as cyclotol, though the former name is more common.

  • Density: 1.65 g/cm³
  • Velocity of detonation: 8,050 m/s
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