Composition H6 is a castable military explosive compound composed of the following percentages by weight:
- 45% RDX
- 30% TNT
- 20% powdered aluminium
- 5% paraffin wax as a phlegmatizing agent.
Another (very similar) version of H6 has the following proportions: RDX (including Nitrocellulose, Calcium Chloride and Calcium Silicate) 45.1%, Trinitrotoluene 29.2%, powdered Aluminium 21% and 4.7% paraffin wax & Lecithin.
H6 is used in a number of military applications, notably underwater munitions (e.g. naval mines, depth charges and torpedoes) where it has generally replaced torpex, being less shock sensitive and having more stable storage characteristics. It is approximately 1.35 times more powerful than pure TNT.
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The original article can be found at Composition H6 and the edit history here.