MIL-DTL-32505
APPENDIX B
ARMOR PLATE, ALUMINUM, ALLOY 7017 WELDABLE and 7020 APPLIQUE
B.1 SCOPE
B.1.1 Scope. This appendix covers the minimum ballistic limits for acceptable requirements
of aluminum alloy armor plate, AA7017 and AA7020 when tested in accordance with the
provisions of this specification. When there is mutual agreement between contractor and
procuring activity, this appendix becomes a mandatory part of this specification and the
information contained herein is intended for compliance.
B.2 APPLICABLE DOCUMENTS
B.2.1 Government documents.
B.2.1.1 Specifications, standards, and handbooks. The following specifications, standards,
and handbooks form a part of this document to the extent specified herein. Unless otherwise
specified, the issues of these documents are those cited in the solicitation or contract.
STANDARDS
DEPARTMENT OF DEFENSE
MIL-STD-662
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V50 Ballistic Test for Armor
(Copies of these documents are available online at https://quicksearch.dla.mil/.)
B.3 DEFINITIONS
B.3.1 Complete penetration, (CP). A complete penetration occurs when the impacting
projectile, or any fragment thereof, or any fragment of the test specimen perforates the witness
plate, resulting in a crack or hole which permits light passage when a 60-watt, 110-volt bulb is
placed proximate to the witness plate.
B.3.2 Fair impact. An impact may be considered fair when an un-yawed fragment simulator
or test projectile strikes an unsupported area of the target material at a specified obliquity at a
distance of at least two projectile diameters from any previous impact or disturbed area
resulting from an impact, or from any crack, or from any edge of the test specimen.
B.3.3 Gap. A gap is the difference in fps between the high partial penetration velocity and the
low complete penetration velocity used to compute the ballistic limit when the high partial
penetration velocity is lower than the low complete penetration velocity.
B.3.4 Partial penetration, (PP). Any impact which is not a complete penetration may be
considered a partial penetration.
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