1、 MIL-DTL-12560K (MR) 7 December 2013 . SUPERSEDING MIL-DTL-12560J (MR) 24 July 2009 DETAIL SPECIFICATION ARMOR PLATE, STEEL, WROUGHT, HOMOGENEOUS (FOR USE IN COMBAT-VEHICLES AND FOR AMMUNITION TESTING) This specification is approved for use by the Department of the Army and is available for use by a
2、ll Departments and Agencies of the Department of Defense 1. SCOPE 1.1 Scope. This specification covers wrought-steel homogeneous armor plate for ordered thicknesses from 0.098 inch (2.5 mm) up to an ordered thickness of 6.000 inches (152.4 mm), inclusive, for use in combat-vehicles and for ordered t
3、hicknesses from 0.250 inches (6.35 mm) up to an ordered thickness of 12.000 inches (304.8 mm), inclusive, for use in proof and acceptance testing of armor defeating ammunition (see 6.1, 6.2, and 6.3.3). 1.1.1 Cross-application. Plates produced to this revision can be used where previous revisions ar
4、e specified. Revision K plates can be used where drawings call for prior revisions. 1.2 Classification. Wrought armor should be of the following classes as specified (see 6.2). 1.2.1 Class 1. Wrought armor plate with an ordered thickness of 0.098 to 6.000 inches (2.5 to 152.4 mm) which is heat treat
5、ed to develop maximum resistance to penetration (see 6.1.1). AMSC N/A FSC 9515 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. INCH-POUND Comments, suggestions, or questions on this document should be addressed to: Director, U.S. Army Research Laboratory, Weapons an
6、d Materials Research Directorate, Materials and Manufacturing Technology Branch, Specifications and Standards Office, Attn: RDRL-WMM-D, Aberdeen Proving Ground, MD 21005-5069 or emailed to richard.j.squillacioti.civmail.mil. Since contact information can change, you may want to verify the currency o
7、f this address information using the ASSIST Online database at https:/assist.dla.mil/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-12560K (MR) 2 1.2.2 Class 2. Wrought armor plate with an ordered thickness of 0.098 to 2.000 inches (2.5 to
8、 50.8mm) which is heat treated to develop maximum resistance to shock (see 6.1.2). 1.2.3 Class 3. Wrought armor plate with an ordered thickness of 0.250 to 12.000 inches (6.35 to 304.8 mm) which is heat treated to develop specific hardness and impact values for evaluation of armor-defeating ammuniti
9、on only. This class of armor is not intended for use in combat-vehicles. To meet the thickness tolerances of this class of armor special surface finishing may be required (see 6.1.3). 1.2.4 Class 4a. Wrought armor plate with an ordered thickness of 0.098 to 2.750 inches (2.5 to 69.9 mm) which is des
10、igned for better resistance to penetration with respect to Class 1 (see 6.1.4) 1.2.5 Class 4b. Wrought armor plate that is air hardened and auto-tempered with an ordered thickness of 0.098 to 2.750 inches (2.5 to 69.9 mm) which is designed for better resistance to penetration with respect to Class 1
11、 (see 6.1.5) 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While eve
12、ry effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and
13、 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. INTERNATIONAL STANDARDIZATION AGREEMENTS ISO 9712 - Non-Destructi
14、ve Testing - Qualification and Certification of NDT Personnel (Copies of this document are available from http:/www.iso.ch or from the International Organization for Standardization American National Standards Institute 11 West 42nd Street, 13th Floor New York, New York, United States, 10036.) DEPAR
15、TMENT OF DEFENSE STANDARDS MIL-STD-129 - Military Marking for Shipment and Storage (Copies of these documents are available online at http:/quicksearch.dla.mil/ or https:/assist.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) Pr
16、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-12560K (MR) 3 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specifie
17、d herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. USADTC TOP 2-2-710 - Ballistic Tests of Armor Materials ITOP 2-2-713 - Ballistic Testing of Armor (Application for copies is available online at http:/www.dtic.mil/ or from the Defens
18、e Technical Information Center, 8725 John J. Kingman Road, Suite 0944, Fort Belvoir, VA 22060-6218.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the
19、solicitation or contract. ASTM INTERNATIONAL ASTM A6/A6M - Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes and Sheet Piling ASTM A370 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products ASTM A578/ A578M - Standard Specific
20、ation for Straight-Beam Ultrasonic Examination of Plain and Clad Steel Plates for Special Applications ASTM A751 - Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products ASTM E10 - Standard Test Method for Brinell Hardness of Metallic Materials ASTM E23 - Standard
21、Test Methods for Notched Bar Impact Testing of Metallic Materials ASTM E110 - Standard Test Method for Indentation Hardness of Metallic Materials by Portable Hardness Testers ASTM E290 - Standard Test Methods for Bend Testing of Material for Ductility ASTM E1077 - Standard Test Methods for Estimatin
22、g the Depth of Decarburization of Steel Specimens ASTM E1444 - Standard Practice for Magnetic Particle Testing (Copies of these documents are available from www.astm.org or ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.) 2.4 Order of precedence. Unless ot
23、herwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtain
24、ed. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-12560K (MR) 4 3. REQUIREMENTS 3.1 First Article. When specified in the contract or purchase order (see 6.2, 6.5 and 6.9), a sample or samples of the specified item shall be made available to
25、 the contracting officer or his authorized representative for approval in accordance with 4.4. The contractor shall comply with this requirement at the time of his first order or contract and at any time that the supplier has not furnished the same class of wrought armor plate in the applicable thic
26、kness range under this specification within a period of 37 months. The approval of the first article samples authorizes the commencement of shipment but does not relieve the supplier of responsibility for compliance with all applicable provisions of this specification, namely conformance or producti
27、on acceptance. The first article samples and test plates shall be manufactured by the process proposed for use on production armor. This process shall be inspected by a cognizant government representative to ensure compliance with the details of this specification. The manufacturers declared chemica
28、l analysis shall be submitted to the contracting agency and to the ballistic test agency. The ballistic test agency shall record the first article ballistic test plates submitted, showing the dates tested. Requests from the procuring activity to the ballistic test agency as to prior conformance with
29、 first article tests shall be accompanied by copies of the first article test firing records. Any deviation(s) noticed by the ballistic agency shall be brought to the attention of the contracting activity and to the manufacturer. 3.1.1 First time producer. First time producers wishing to qualify to
30、this specification shall follow the instructions of 6.7. 3.2 Production acceptance. 3.2.1 Chemical composition. A declared chemistry shall be submitted to the contracting agency or its authorized representative and to the ballistic test agency. The chemical composition of the declared chemistry shal
31、l conform to the requirements of Table I, column A, unless otherwise specified in the contract or purchase order (see 6.2). If an analysis of Antimony, Arsenic or Lead is required, it shall be specified in the contract or purchase order (see 6.2). A single heat cannot be dual certified to both MIL-D
32、TL-12560 and MIL-DTL-46100. The chemical composition shall be determined by a product analysis (values shall be listed as weight percent) in accordance with 4.6.1.1 and 4.8.1. The first article samples and the production test plates shall utilize the same declared chemistry within the allowable rang
33、es proposed for use in production. A statement showing the heat analysis of each melt and one product analysis of each lot, complete details of the heat treatment, and all mechanical properties of each lot of production plates shall be furnished for the files of the purchaser at no cost. All element
34、s of the chemical composition specified in Table I shall be shown in the statement. This statement shall be attached to the completed Rolled Homogeneous Armor Test Data Form (see Figure 1), or other certifications containing the same information. 3.2.2 Carbon equivalence. Carbon equivalence (CE) sha
35、ll be calculated for each heat per ASTM A6/A6M, i.e. CE = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15 where the elements are expressed in wt%. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-12560K (MR) 5 TABLE I. Chemical composition and preci
36、sion (product analysis) 6/. ELEMENT COLUMN A MAXIMUM LIMIT for DECLARED CHEMISTRY (WEIGHT PERCENT) COLUMN B 5/ALLOWABLE RANGE for FUTURE PRODUCTION LOTS (WEIGHT PERCENT) Carbon 0.27 up to 2” thick, incl 0.29 over 2” up to 4” 0.31 over 4” 0.05 Manganese NONE REQUIRED, HOWEVER IF: 1.00 0.15 0.20 Phosp
37、horus 0.020 1/4/Sulfur 0.010 1/4/Silicon NONE REQUIRED, HOWEVER IF: 0.60 to 1.00 0.10 0.15 0.20 Nickel NONE REQUIRED 3/ 0.25 Chromium NONE REQUIRED, HOWEVER IF: 1.25 0.15 0.25 Molybdenum NONE REQUIRED, HOWEVER IF: 0.20 0.035 0.075 Vanadium NONE REQUIRED 3/ 0.05 Niobium NONE REQUIRED 3/ 0.05 Boron -
38、2/4/Copper 0.25 3/4/Nitrogen 0.03 3/4/Titanium 0.10 3/4/Aluminum 0.10 3/4/Lead 0.01 3/4/Tin 0.02 3/4/1/Phosphorus and sulfur total shall not exceed 0.020 wt%. 2/When the amount of boron is specified in the alloy, its content as determined by heat analysis shall not exceed 0.003 percent. 3/When the a
39、mount of an element is less than 0.02 percent the analysis may be reported as 60 to 72 72 to 84 84 to 96 96 to 108 108 to 120 120 to 132 132 to 144 0.0980 0.1249 0.012 0.012 0.012 0.012 0.012 - - - 0.1250 0.1874 0.012 0.012 0.015 0.015 0.017 - - - 0.1875 0.2499 0.012 0.015 0.017 0.020 0.020 - - - 0.
40、2500 0.3749 0.015 0.017 0.017 0.020 0.022 0.025 - - 0.3750 0.6249 0.017 0.017 0.017 0.020 0.025 0.027 0.030 0.030 0.6250 0.9990 0.020 0.020 0.020 0.025 0.030 0.030 0.035 0.035 1.0000 1.4990 0.030 0.030 0.030 0.030 0.035 0.040 0.050 0.050 1.5000 1.9990 0.040 0.040 0.040 0.040 0.045 0.050 0.055 0.060
41、2.0000 2.9990 0.055 0.055 0.055 0.065 0.065 0.065 0.065 0.075 3.0000 3.9990 0.060 0.060 0.060 0.070 0.070 0.070 0.070 0.075 4.0000 5.9990 0.075 0.075 0.075 0.075 0.075 0.075 0.075 0.085 6.0000 7.9990 0.090 0.090 0.090 0.090 0.090 0.090 0.095 0.105 8.0000 9.9990 0.105 0.105 0.105 0.105 0.105 0.105 0.
42、120 0.135 10.0000 12.0000 0.135 0.135 0.135 0.135 0.135 0.135 0.145 0.160 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-12560K (MR) 10 3.2.6.3 Bend test. Unless otherwise specified in the contract or purchase order (see 6.2), bend test samp
43、les shall be required for a given lot of plates with an ordered thickness of 0.500 inch and under, and shall be capable of being bent to the requirements specified in Table V without cracking (see 4.6.1.3, 4.6.2.4 and 4.8.4). For ordered thickness of greater than 0.500 inches a bend test shall be sp
44、ecified in the contract or purchase order (see 6.2). After bending, samples shall be free of cracks as determined by visual inspection unless otherwise specified in the contract or purchase order (see 6.2). TABLE IV. Minimum Charpy V-notch impact requirements (at -40oF + 2oF)Table V. Bend test requi
45、rements. Ordered Plate Thickness (T) Inside Radius Class 2 Class 1, 3 therefore, legacy designs/items (contracts/drawings) which used MIL-DTL-46177C in the past can continue to use MIL-DTL-46177C. The current thickness of this specification was even further reduced to 0.098 inches. 6.1.2 Class 2. Cl
46、ass 2 wrought armor plate is intended for use in those areas where maximum resistance to failure under conditions of high rates of shock loading is required and where resistance to penetration by armor piercing ammunition is of secondary importance. It is intended for use as protection against anti-
47、tank land mines, hand grenades, bursting shells, and other blast-producing weapons. 6.1.3 Class 3. Class 3 wrought armor plate is intended for use in the proof and acceptance testing of armor defeating ammunition. This class is not intended for use in combat vehicles. Lift hole requirements for Clas
48、s 3 armor should be specified by the procuring activity. 6.1.4 Class 4a. Class 4a wrought armor plate has the same maximum carbon content as the other classes, but is tempered at lower temperatures (in Stage I) to give higher hardness. This higher hardness gives the armor enhanced resistance to ball
49、istic penetration. 6.1.5 Class 4b. Class 4b wrought armor has the same maximum carbon content as the other classes, but is tempered at lower temperatures (in Stage I) to give higher hardness. This higher hardness gives the armor enhanced resistance to ballistic penetration. Class 4b has air hardening ability which may lend itself to applications requiring h
