1、 INCH-POUNDMIL-DTL-32341 (MR) 31 March 2010_ DETAIL SPECIFICATION ARMOR PLATE, ALUMINUM ALLOY, 2xxx, UNWELDABLE APPLIQUE This specification is approved for use by the Department of the Army and is available for use by all Departments and Agencies of the Department of Defense 1. SCOPE 1.1 Scope. This
2、 specification covers 2xxx wrought aluminum alloy armor plate for non fusion welded applications in nominal thicknesses from 0.500 to 4.000 inch, inclusive (see 6.2). The fusion weldability of 2xxx wrought aluminum alloy armor has not been determined over this thickness range. Therefore, these alloy
3、s should only be used as appliqu armor. 1.2 Classification. The wrought aluminum armor should be of the following classes and tempers, as specified (see 6.2). 1.2.1 Class I. Wrought aluminum armor that conforms to the Aluminum Association designation for the 2139 aluminum alloy in a T8 temper. The a
4、pplicable gauge range for Class I is 0.500-4.000 inches. 1.2.2 Class II. Wrought aluminum armor that conforms to the Aluminum Association designation for the 2195 aluminum alloy in a T64 temper. The applicable gauge range for Class II is 0.500-2.250 inches. Comments, suggestions, or questions on thi
5、s document should be addressed to: Director, U.S. Army Research Laboratory, Weapons and 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 rsquillaarl.army.mil. Sin
6、ce contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.daps.dla.mil/. AMSC N/A FSC 9535 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo repr
7、oduction or networking permitted without license from IHS-,-,-MIL-DTL-32341 (MR) 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
8、 or recommended for additional information or as examples. While every 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 li
9、sted. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified (see 6.2), the issues of these documents are those cited in the solicitation
10、or contract. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-662 - V50Ballistic Test for Armor (Copies of these documents are available online at https:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Go
11、vernment publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated (see 6.2), the issue in effect on the date of invitation for bids or request for proposal should apply. SAE INTERNATIONAL AMS 2750 - Pyrometry AMS 2772 - Heat T
12、reatment of Aluminum Alloy Raw Materials (Application for copies should be addressed to SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM B557 - Standard Test Methods for Tension Testing Wrought and Cast Aluminum and Magnesi
13、um- Alloy Products (DoD adopted) ASTM E34 - Standard Test Methods for Chemical Analysis of Aluminum and Aluminum-Base Alloys (DoD adopted) 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32341 (MR) ASTM E607 - Standard Test Method for Atomic
14、 Emission Spectrometric Analysis of Aluminum Alloys by the Point-to-Plane Technique, Nitrogen Atmosphere (DoD adopted) ASTM E716 - Standard Practices for Sampling Aluminum and Aluminum Alloys for Spectrochemical Analysis ASTM E1251 - Standard Test Method for Analysis of Aluminum and Aluminum Alloys
15、by Atomic Emission Spectrometry (DoD adopted) (Copies of these documents are available from www.astm.org or ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict
16、 between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 F
17、irst article. When specified in the contract or purchase order (see 6.2), first article testing shall be required and all test samples required by this specification shall be made available to the contracting officer or his authorized representative for approval in accordance with 4.3. First article
18、 testing shall be completed before production material is submitted for acceptance testing. The approval of the first article samples authorizes commencement of production but does not relieve the supplier of the responsibility to comply with all the applicable provisions of this specification. The
19、first article samples and acceptance test plates shall be manufactured by the process proposed for use on production items. 3.2 Chemical composition. The chemical composition of the plates shall be within the limits shown in Table I. The limits specified in Table I were taken from Aluminum Associati
20、on (AA) registered composition limits for Aluminum Alloys. A certification of conformance of the chemical composition of the alloy shall be furnished with the ballistic test plates. 3.3 Mechanical properties. Unless otherwise specified in the contract or order (see 6.2), the mechanical properties of
21、 the test specimen taken in the longitudinal direction shall meet the minimum mechanical properties listed in Table II. If mechanical property requirements differ from those contained in Table II, or if any other properties are required, the ballistic requirements shall be negotiated between the pro
22、curing activity and the supplier. 3.4 Ballistic limit. The protection ballistic limit, BL(P), shall be as specified in Appendix A. When a complete penetration can not be obtained for any class of armor 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,
23、-MIL-DTL-32341 (MR) material, the following rule shall be in effect until a new ballistic acceptance round can be developed and utilized. When the ballistic velocities of four (4) partial penetrations are above the minimum ballistic requirement for the specific thickness, the material shall be certi
24、fied as acceptable with a V50(which obviously can not be explicitly determined) above the minimum requirement. TABLE I. Chemical composition, weight percent. 1/ ELEMENTS SYMBOLClass I 2139 ALLOY 2/Class II 2195 ALLOY 2/Silicon Si 0.10 0.12 Iron Fe 0.15 0.15 Copper Cu 4.5 -5.5 3.7 - 4.3 Manganese Mn
25、0.20 -0.60 0.25 Magnesium Mg 0.20 - 0.80 0.25 - 0.8 Chromium Cr 0.005 N/A Zinc Zn 0.25 0.25 Titanium Ti 0.15 0.10 Vanadium V 0.05 N/A Zirconium Zr N/A 0.08 - 0.16 Lithium Li N/A 0.8 - 1.2 Silver Ag 0.15 - 0.60 0.25 - 0.6 Other, max. Each - 0.05 0.05 Other, max. Total 3/ - 0.15 0.15 Aluminum Al Remai
26、nder Remainder 1/Except for “Aluminum” and “others”, analysis normally is made for elements for which specific limits are shown. 2/Where single units are shown, these indicate the maximum amounts permitted. 3/The sum of those “others” metallic elements 0.010 percent or more each, expressed to the se
27、cond decimal before determining the sum. TABLE II. Minimum mechanical properties. 1/ Thickness, inches Tensile Strength, ksi Yield Strength, 0.2% Offset, ksi Elongation percentClass I Class II Class I Class II Class I Class II 0.500 to 3.000, incl. 67 71 2/64 63 2/9 9 2/3.001 to 4.000, incl. 67 N/A
28、64 N/A 9 N/A 1/The gage length shall be 1.400 inch for plates having a nominal thickness of 0.500 inch. 2/ For alloy 2195 (Class II) the applicable gauge range is 0.500-2.250 inches. 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32341 (MR)
29、 3.5 Thermal processing. Heat treatment shall conform to the requirements of SAE AMS 2750 and SAE AMS 2772 and shall be such as to enable the material to meet the requirements of these specifications. 3.6 Dimensions. Dimensions shall be as specified in the contract or order (see 6.2). 3.6.1 Toleranc
30、es. Unless otherwise specified in the contract or order (see 6.2), the plates submitted for acceptance shall not vary from the specified dimensions by an amount as specified in Table III. 3.7 Marking for identification. Unless otherwise specified in the contract or purchase order (see 6.2) each plat
31、e shall be marked on one plate edge with the manufacturers name or CAGE code, the basic number of this specification, the plate thickness in inches, the alloy designation and the lot number or code relating to the lot number (see 4.2). The height of the characters shall be 3/8 of an inch or greater.
32、 Impression stamping shall not be used unless permitted by the procuring activity (see 6.2). Each plate shall be marked in lengthwise rows of characters recurring at intervals not greater than 3 feet, the rows being spaced not more than 6 inches apart and alternately staggered. The characters shall
33、be not less than 3/8 inch in height and shall be applied using a suitable marking fluid whose residue shall contain not more than traces of halogen-bearing compounds and shall be capable of being removed in hot alkaline cleaning solution without rubbing. The markings shall have no deleterious effect
34、 on the plate material or its performance and shall be sufficiently stable to withstand normal handling. 3.7.1 Ballistic test plates. In addition to the markings in 3.7, each ballistic test plate shall be marked with the letters PRE for First Article test plates and ACC for Acceptance test plates. T
35、his marking shall be impression stamped on the edge in letters 3/8 inch high or greater. Ballistic retest plates shall be marked “R1“ and “R2“ respectively (see A.5.2). TABLE III. Thickness tolerances. SPECIFIED WIDTH (Inches) OVER 0.00 39.37 59.06 78.74 98.43 118.11 137.80 157.48 Ordered Thickness
36、(Inches) THRU 39.37 59.06 78.74 98.43 118.11 137.80 157.48 177.17 OVER THRU TOLERANCES - INCHES (PLUS and MINUS) 0.500 1.000 0.031 0.031 0.037 .043 0.051 0.060 0.070 0.085 1.000 1.575 0.039 0.039 0.047 0.055 0.065 0.075 0.090 0.105 1.575 2.362 0.055 0.055 0.060 0.070 0.085 0.100 0.115 - 2.362 3.000
37、0.075 0.075 0.085 0.100 0.105 0.125 - - 3.000 4.000 0.090 0.090 0.105 0.110 0.125 - - - 3.8 Ballistic test plate information. For each lot of aluminum alloy armor a properly completed Aluminum Armor Test Data Form (See Figure 1) shall be submitted with each ballistic test plate that represents that
38、particular processing lot. 3.9 Workmanship. Plate produced under this specification shall be uniform in quality and clean, smooth and sufficiently free from buckles, blisters, hard spots, damaged ends, laminations and other defects which may affect its use. 5Provided by IHSNot for ResaleNo reproduct
39、ion or networking permitted without license from IHS-,-,-MIL-DTL-32341 (MR) REQUEST FOR BALLISTIC TEST OF ALUMINUM ALLOY 2xxx ARMOR FIRING RECORD: DATE: Plate MANUFACTURER / PRODUCER: PRIME CONTRACTOR: Name: Name: Address: Address: POC: POC: Phone No: Phone No: Fax No: Fax No: SPECIFICATION: MIL-DTL
40、- 32341 (MR) REVISION: AMENDMENT: CONTRACT NO: ATC PROJECT NO: DCAS REGION: BALLISTIC TEST CONTRACT NO: TEST ITEM IDENTIFICATION: Lot No. Class: Plate No. Ordered Thickness Alloy and Temper PURPOSE: _ Acceptance _ First Article _ Development SAMPLE: _ Primary _ Retest (Firing Record No. of Failed Sa
41、mple_) CHEMICAL ANALYSIS: OTHERS: Al : Si Fe Cu Mn Mg Cr Zn Ti V Zr Li Ag MECHANICAL PROPERTIES: UTS (ksi): 0.2% YS (ksi): Elongation (%): BALLISTIC TEST RESULTS: Test Projectile Notes Obl. (deg) Actual Thickness (in)RequiredV50 (fps)Actual V50 (fps)Pass/ Fail LOTS REPRESENTED BY: Reduced Testing Au
42、dit Testing Lot met failed to meet the ballistic requirements of specification MIL-DTL- 32341 MR). Government Representative Date Supplier Representative Date FIGURE 1. Aluminum Armor Test Data Form. 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M
43、IL-DTL-32341 (MR) 4. VERIFICATION 4.1 Classification of inspection. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.3). b. Conformance inspection (see 4.4). 4.2 Lot. A lot shall consist of all plate of the same alloy and ordered thickness wh
44、ich has been processed together by the same mill practice. Unless otherwise specified in the contract or purchase order (see 6.2), the weight of the finished plate in the lot shall not exceed 50,000 pounds and shall be submitted for inspection as a unit. 4.3 First article inspection. First article i
45、nspection, except as otherwise indicated in this specification, shall utilize the same requirements and test methods as the production acceptance inspection shown in 4.4. 4.4 Conformance inspection. Conformance inspection or production acceptance inspection shall include the examination of 4.6 and t
46、he tests of 4.7. 4.5 Sampling. 4.5.1 First article inspection. 4.5.1.1 Chemical composition. One (1) sample for chemical analysis shall be removed from each plate selected for ballistic testing and shall meet the requirements of 3.2 when tested as specified in 4.7.1. 4.5.1.2 Mechanical properties. O
47、ne tension test specimen shall be removed from each plate that has been selected for ballistic testing and shall meet the requirements when tested as specified in 4.7.2. 4.5.1.3 Ballistic tests. Two plates, 12 inches by 36 inches of each thickness to be supplied on the contract, shall be submitted f
48、or ballistic testing in accordance with Appendix A. The orientation of these plates with respect to the rolling direction shall be at the option of the producer. 4.5.2 Conformance inspection. 4.5.2.1 Chemical composition. The sample shall meet the chemical composition requirements of 3.2 when tested
49、 as specified in 4.7.1. 4.5.2.1.1 Ingot analysis. At least one sample shall be taken from the molten metal representing the ingots poured as a unit from the same source molten metal. Complete ingot analysis records shall be available to the Government at the producers facility. 7Provided by IHSNot for ResaleNo reproduction or networking
