Tetrytol

Tetrytol is a high explosive, comprising a mixture of tetryl and TNT.[1] Typically, the proportion of ingredients (by weight) is 65%, 70%, 75% or 80% tetryl to 35%, 30%, 25% or 20% TNT. Tetryl and TNT do form an eutectic with a setting point of 67.5 °C, which consists of 55% tetryl and 45% TNT.[2] Hence, cast tetrytol charges consist of solidified suspensions of crystalline tetryl in the solid tetryl-TNT-eutectic. Tetrytol is more sensitive than TNT and less sensitive than tetryl to impact.[1] The detonation velocity of unconfined cast cylindrical charges (1 inch diameter) of tetrytol is between 7290 and 7410 m/s with an average of 7350 m/s for tetrytol 75/25 and 7340 m/s for tetrytol 65/35.[2] For comparison, cylindrical charges of cast pure TNT of similar dimensions are reported to detonate with a velocity of between 6680 and 6990 m/s.[3]

Characteristics of Tetrytols

Applications of tetrytol are usually military in nature e.g. burster tubes for chemical weapons (e.g. nerve agent shells), blocks of demolition explosives and cast shaped charges.[2]

Dry tetrytol is compatible with copper, brass, aluminum, magnesium, stainless steel, mild steel coated with acid proof paint and mild steel plated with copper, cadmium, zinc or nickel. Magnesium-aluminum alloys are slightly affected by dry tetrytol. Wet tetrytol is compatible with stainless steel and mild steel coated with acid proof black paint. Copper, brass, aluminum, magnesium, magnesium-aluminum alloy, mild steel and mild steel plated with cadmium, copper, zinc or nickel are slightly affected by wet tetrytol.[4]

When stored below 65 °C (149 °F) Tetrytol does not change stability, acid content, sensitivity or brisance. However, temperatures at 65 °C or above will allow the formation of an oily extrudate and distortion of blocks. Although tetryl undergoes partial decomposition on melting, the melting of tetrytol does not have the same effect. Even when Tetrytol is melted and solidified numerous times it causes no change in freezing point, sensitivity to impact or 100 °C vacuum stability test value.[2]

Note: Tetrytol has been discontinued by the U.S. due to the exudation and low stability at elevated storage temperatures.[2]

Tetrytol was mentioned extensively in the Season Three, Episode 10 of Hawaii Five-O, entitled The Last Eden.

gollark: Being vaguely aware of that sort of thing, and also that I live in a relatively comfortable position in what is among the richest societies ever, I feel bad about *not* doing more things, which would cause me to be more evil than someone who just ignores this issue forever, which is not, according to arbitrary moral intuitions I have™, something which an evilness measuring thing should say.
gollark: With any actual planning you can just give away as much as reasonably possible. It's just an issue of good management of stuff.
gollark: There are *not* that many people who actually go to the logical conclusion of that line of thinking and go "guess I'll donate all my excess income to charities".
gollark: It would be bad for you and you could argue that not doing so maximizes long-run donation, but you aren't actually maximizing that either.
gollark: You *can* give that money away, though.

References
  1. US Army TM 9-1300-214 (p.8-121). Department of the Army (US). 1 September 1984. pp. 8–121. Retrieved 30 December 2015.
  2. US Army TM 9-1300-214 (p.8-122). Department of the Army (US). 1 September 1984. pp. 8–122. Retrieved 30 December 2015.
  3. T. Urbański: Chemistry and technology of explosives. Volume 1 (reprint) (p.321). Pergamon Press. 1985. p. 321. ISBN 0080102387.
  4. US Army TM 9-1300-214 (p.8-123). Department of the Army (US). 1 September 1984. pp. 8–123. Retrieved 30 December 2015.


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