MIL-DTL-46100 Armor Plate, Steel, Wrought, High-HardnessThis specification covers quenched and tempered high-hardness wrought steel armor plate for lightweight armor applications for ordered thicknesses from 0.118 inches \(3 mm\) up to an ordered thickness of 2.000 inches \(50.8 mm\), inclusive \(see 6.1, 6.2, and 6.3\).

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MIL-DTL-46100E (MR)

determined by either penetrate inspection per ASTM E1417 or magnetic particle inspection

per ASTM E1444 (see 3.2.6)."

6.14 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 VI.

TABLE VI. 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)

Note: Conversion factors can be associated with ASTM E380 entitled "Metric Practice Guide."

6.15 Subject term (key word) listing.

Ballistic testing

Batch tempering

Continuous tempering

Lightweight armor

Heat treated plates

High hard armor

Wrought steel

6.16 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.