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INCH-POUND
MIL-A-12560H (MR)
w/INT. AMENDMENT 4
20 July 2007
USED IN LIEU OF
MIL-A-12560H (MR)
w/AMENDMENT 3
27 September 2000
MILITARY SPECIFICATION
ARMOR PLATE, STEEL, WROUGHT, HOMOGENEOUS
(FOR USE IN COMBAT-VEHICLES AND FOR AMMUNITION TESTING)
This specification is approved for use by all Departments and Agencies of the Department of
Defense.
1. SCOPE
1.1 Scope. This specification covers wrought-steel homogeneous armor plate in thicknesses
for 1/4 to 6 inches inclusive for use in combat-vehicles and 1/2 to 12 inches inclusive for use
in proof and acceptance testing of armor defeating ammunition (see 6.1 and 6.4.3).
1.2 Classification. Wrought armor should be of the following classes as specified (see 6.1).
1.2.1 Class 1. Wrought armor plate which is heat treated to develop maximum resistance to
penetration.
1.2.2 Class 2. Wrought armor plate which is heat treated to develop maximum resistance to
shock.
1.2.3 Class 3. Wrought armor plate which is heat treated to develop specific hardness and
impact values for evaluation of armor defeating ammunition only. This class armor is not
intended for use in combat-vehicles. To meet the thickness tolerances of this class armor
special surface finishing may be required.
Comments, suggestions, or questions on this document should be addressed to: Director, U.S.
Army Research Laboratory, Weapons and Materials Research Directorate, Materials
Applications Branch, Attn: AMSRD-ARL-WM-MC, Aberdeen Proving Ground, MD 21005-
5069 or emailed to rsquilla@arl.army.mil. Since contact information can change, you may
want to verify the currency of this address information using the ASSIST Online database at
8Hhttp://assist.daps.dla.mil/.
AMSC N/A
FSC 9515

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