MIL-DTL-46100E (MR)
Army Tank-Automotive and Armaments Command, Warren, MI 48397-6000. The long
dimension of the plate is normally the rolling direction. If a forming operation is to be
performed, the rolling direction should be tracked so that bending is preferably not
performed longitudinal to the rolling direction.
6.4 Special first article ballistic test. Special first article ballistic tests are required when the
manufacturer changes either the heat treatment or the declared chemistry of the armor.
6.5 Chemical analysis. Suggested ASTM instrumental methods that can be used for
chemical analysis are E322 and E415. ASTM A751 should be consulted for a complete list
of methods.
6.6 Production plates. Material made to this specification has tendency to develop stress
cracks if not tempered as soon as possible after austenitizing treatment. To avoid this
situation, all plates should be left in the hot rolled or tempered condition while waiting for
the ballistic test results.
6.7 Potential suppliers. Potential suppliers who have not previously supplied armor plate to
MIL-DTL-46100 and wish to have their material ballistic tested, may do so at their own
expense. It is recommended that inquiries for such testing be directed to Commander, USA
ATC, ATTN: TEDT-AT-SLV, Building 358, 400 Colleran Road, APG, MD 21005-5059.
6.8 Alternate ballistic testing facility. Request for approval for an alternate ballistic testing
facility should be forwarded by the procuring activity to the Director, U.S. Army Research
Laboratory, Weapons and Materials Research Directorate, Specifications and Standards
Office, Attn: AMSRD-ARL-WM-MC, Aberdeen Proving Ground, MD 21005-5069 and
should be obtained prior to the contract award.
6.9 New contracts sponsored by government agencies. At the time that a new contract is
initiated for the production of combat vehicles, the contractor's supplier is to estimate the
number, size and delivery schedule of the ballistic test plates which are to be submitted for
first article or acceptance testing (see 6.2). A lead time of 60 days after the contract has
been signed is to be allowed prior to shipment of the first ballistic test(s) to APG to insure
that all administrative functions for the establishment of a new ATC project have been
completed in preparation for the test. The contracting government activity is to initiate the
new project through a letter to Commander, USA ATC, ATTN: TEDT-AT-SLV, Building
358, 400 Colleran Road, APG, MD 21005-5059 requesting a cost estimate for the ballistic
testing of the applicable number and sizes of plates. In the case of increases in scope of
existing projects, similar correspondence is needed.
6.10 Definitions.
6.10.1 Slivers. An imperfection consisting of a very thin elongated piece of metal attached
by only one end to the parent metal into whose surface it has been worked.
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