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Sheet metal is available in flat pieces or coiled strips. The coils are formed by running a continuous sheet of metal through a roll slitter. In most of the world, sheet metal thickness is consistently specified in millimeters. In the U.S., the thickness of sheet metal is commonly specified by a traditional, non-linear measure known as its ...
First plate thickness First plate hardness First air gap Second plate thickness Second plate hardness Second air gap Third plate thickness Third plate hardness Single medium: 60° 130 mm: Single heavy: 60° 150 mm: 260-300 kp/mm 2: Double medium: 60° 40 mm: 150 mm: 90 mm: Double heavy: 60° 40 mm: 308-353 kp/mm 2: 150 mm: 110 mm: 260-300 kp/mm ...
The VPAM scale as of 2009 runs from 1 to 14, with 1-5 being soft armor, and 6-14 being hard armor. [1] Tested armor must withstand three hits, spaced 120 mm (4.7 inches) apart, of the designated test threat with no more than 25 mm (0.98 inches) of back-face deformation in order to pass.
SAPI plates meant for body armor come in front and back plates which are identical, and smaller side plates. The front and back plates come in five sizes. Their dimensions are the following: [1] [13] Front and back SAPI plates: Extra Small - 1.27 kg (2.8 lb) | 184 x 292 mm (7¼ x 11½ in) Small - 1.59 kg (3.5 lb) | 222 x 298 mm (8¾ x 11¾ in)
A36 steel in plates, bars, and shapes with a thickness of less than 8 inches (203 millimeters) has a minimum yield strength of 36 ksi (250 MPa) and ultimate tensile strength of 58–80 ksi (400–550 MPa).
Most overt armour plates usually are sized to 250 mm × 300 mm (10 in × 12 in), 280 mm × 360 mm (11 in × 14 in), and other such dimensions, however SAPI plates are slightly different. [4] In addition, armour plates may be curved to assist in the user's comfort and ergonomics.