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British Armour Specifications and Penetration Critiera PDF Print E-mail
Written by David Boyd   
Thursday, 01 January 2009 21:19

British Armour Specifications / Penetration Criteria

Plate Specifications

Code Type 
I.T.60 Thin face hardened plate
I.T.70 Homogeneous hard plates 3 to 14mm thick
I.T.80 Machineable quality plates 15mm thick and over
I.T.90 Cast armour
I.T.100 Machineable quality plates 3 to 14mm thick
I.T.110 Heat-treated Carbon Manganese steel

Penetration Codes

Code Result
A Slight or no impression
B Deep impression
C Deep impression and bulge at back
D Deep impression and bulge at back and crack
E Deep impression with flak off the back of the plate, or bulge and crack
P Pinhole penetration
R Penetration, core not clean through the plate
W Penetration, core clean through
L Indicates core lodged in plate i.e. P(L)

Penetration Criteria

Ballistic limit - the striking velocity at which there is a 50% chance of getting daylight through the plate or of metal being thrown from the back of the plate.

Immunity level - highest velocity which would give only a smooth bulge on the back of the plate

W/R Limit - the striking velocity at which half give "W" and half "R" or less.

O.B. Critical Velocity - 50% of shot is expected to be partial or full penetrations

Sources - AVIA 46 118

Last Updated on Thursday, 01 January 2009 21:21
 

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