MIL-DTL-12560K (MR)
6.9 Fabrication. The armor plate covered by this specification is subject to fabrication involving
cutting, drilling, forming and welding. It is intended that selection and control of chemical
composition, cleanliness, and plate processing should be such that the armor will be suitable for
fabrication in accordance with TACOM code 12479550, TACOM Ground Combat Vehicle
Welding Code-Steel. Copies of this document are available from U.S. Army Tank-Automotive
and Armaments Command, Warren, MI 48397-6000.
6.10 Forming. Cold forming after the final quenching and tempering operations may be
performed if dye penetrant or magnetic particle inspection of the formed area finds it to be free
of linear indications. The supplier should practice such necessary process controls to prevent this
condition.
6.11 Metric units. When metric dimensions are required, units for inch, foot, foot-pounds and
feet per second may be converted to the metric equivalent by multiplying them by the following
conversion factors listed in Table VII.
TABLE VII. Conversion factors.
English
Multiply by
Equals
Metric SI unit
inch
0.0254
=
meter (m)
foot
0.3048
=
meter (m)
pound
0.4536
=
kilogram (kg)
foot-lb
1.3558
=
joule (j)
feet/sec
0.3048
=
meter per second (m/s)
Fahrenheit (°F)
(t°F - 32)/1.8 = t°C
Centigrade (°C)
Note: Conversion factors can be associated with ASTM E380 entitled "Metric Practice Guide."
6.12 Subject term (key word) listing.
Ballistic limit
M70 projectile
M82 projectile
Ballistic plate
M318 projectile
M2 projectile
Bend test
M602 projectile
6.13 Changes from previous issue. Marginal notations are not used in this revision to identify
changes with respect to the previous issue due to the extent of the changes.
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