 |
|||
|
|
|||
| ||||||||||
|
|  MIL-C-46409D (AR)
APPENDIX "B" (CONT'D)
40.2 Test of cartridges.
40.2.1 The cartridges are positioned in both nitric acid and mercurous nitrate solutions in a
vertical position, with the head of the case down. The depth of the solution is adjusted until it
completely covers the mouth of the case but does not cover more than one-half the body of the
bullet.
40.2.2 One-half of the number of cartridges prescribed in the applicable specification for the
Mercurous Nitrate test is submerged in the nitric acid solution. After thirty (30) seconds the
cartridges are withdrawn, rinsed in water and the excess water removed. The cartridges are then
submerged for fifteen (15) minutes in the mercurous nitrate solution. Immediately upon removal
the surface of the cartridges case in examined under a magnification (10 to 15 diameters) for
splits and cracks. All splits and cracks shall be reported.
40.3 Test of cartridge cases
40.3.1 The cases for this test are obtained by disassembly of cartridges. The primers must
be fired prior to using the cases.
40.3.2 The cases are positioned in both nitric acid and mercurous nitrate solutions in a
vertical position, with the head of the case down. The depth of each solution is adjusted until it
completely covers the mouth of the case but does not rise more than one-half inch above the
mouth of the cases.
40.3.3 Cases from the remaining half of the number of cartridges prescribed in the
applicable specification for the Mercurous Nitrate Test (after the bullet and propellant have been
removed and primer fired) are submerged in nitric acid solution.
After thirty (30) seconds, the cases are withdrawn, rinsed in water and then excess water
removed. The cases are then submerged for fifteen (15) minutes in the mercurous nitrate
solution. Immediately upon removal, the mercury on the surface of the case is volatilized by the
application of heat and the surface of the case examined under magnification (10 to 15 diameters)
for splits and cracks. All splits and cracks shall be reported.
NOTE:
(1) A split is defined as a separation of the metal entirely through the wall of the
case
(2) A crack is a surface condition and represents a separation of the metal partially
through the wall of the case. Cracks are not considered to be splits.
23
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals