Metals, expl working

Rept 7033(NOTSTP242l), China Lake, Calif 1966 (Expl working of metals) 14)G.Cohn Edit, Expls St Pyrots 4(7), 1971 (Expls forming for manpf metal plate dentures)... 

Extruders are devices for loading by extrusion (qv) metals, plastics, expls and pyrotechnic compositions. For example, expls such as some Amatols, Explosive D, Compositions A C, etc which cannot be cast-loaded can be loaded by pressing them thru a steel tube by means of a worm screw working inside. 

Acid-Resistant Materials. As acid plants are usually attached to plants manufg expls, it is important to have some knowledge of acid-resistant materials, such as metals, bricks, plastics, gaskets, paints, cements and putties, etc.Basic info on this subject may be found in the refs listed below. A common type of acid-proof putty is one consisting of powd red iron oxide and asbestos fiber in a petroleum grease. During WW II, this type of putty was used at many US Ord Plants, including Wabash Ordnance Works... 

If BkPdr is spilled on benches or floors, all work in the vicinity must be stopped until the pdr has been removed and the expl hazard of any remaining dust or fine particles has been removed by washing down the area with w Most of the above operations belong to maintenance activities. To these may be added repainting marking of containers, replacement of metallic caps, etc... 

It was found that this addition increased the avg power (Pb block expansion) over the pure expls by 5.96%. The Si addition to RDX and PA decreased the avg deton vel by 2035m/sec (30.31%). Sartorius also found that in lab mixts of AN and TNT addition of Si decreased the sensitivity to shock. It was also found that powd Si did not react with w at RT to release hydrogen. The exptl series continued with an investigation of the value of A1 which, when similarly incorporated into the same series of expls as Si, was found to increase the power over that of the (pure) expls by an avg of 16.04%. Sartorius concluded that for the same percent addition, the specific work increase (power) to be expected from the use of Si in expls was 1/2 to 2/3 that of Al. Sartorius also derived a thermodynamic equation to predict the percentage increase in Pb block value produced by a 1% addition of any metal to an e.xp that is slightly oxygen deficient with a potential Q of 1000 cal/g ... 

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