1、MIL-A-bZY73B 999990b Lb99025 58T INCH-POUND MIL-A-62473B(AT) 30 November 1992 SUPERSEDING MIL-A-62473A(AT) 30 March 1984 MILITARY SPECIFICATION ARMOR: ALUMINUM-ARAMID, LAMINATE COMPOSITE This specification is approved for use by the US Army Tank-Automotive Command, Department of the Army, and is ava
2、ilable for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the bonding of an aluminum plate to an aramid laminate pad to form a composite armor plate. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 SDecifications, standards, an
3、d handbooks. Unless otherwise specified, the following specifications, standards, and handbooks of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DODISS) specified in the solicitation form a part of this specification to the extent specified herein
4、. SPECIFICATIONS MILITARY MIL-C-5541 - Chemical Conversion Coatings on Aluminum and MIL-S-8802 - Sealing Compound, Temperature-Resistant, Aluminum Alloys. Integral Fuel Tanks and Fuel Cell Cavities, High Adhesion. MIL-P-23377 - Primer Coatings: Epoxy-Polyamide; Chemical and Solvent Resistant. MIL-A-
5、46027 - Armor Plate, Aluminum Alloy, Weldable 5083 and 5456. MIL-P-46593 - Projectiles, Calibers .22, .30, .50, and 20mm, Fragment-Simulating. MIL-L-62474 - Laminate: Aramid-Fabric-Reinforced, Plastic. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of
6、 use in improving this document should be addressed to: US Army Tank-Automotive Command, ATTN: AMSTA-GDS, Warren, MI 48397-5000, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter. AMSC N/A FSC 9535 0 is unlimi
7、ted. DISTRIBUTION STATEMENT A. Approved for public release; distribution Licensed by Information Handling ServicesMIL-A-bZ473B 999990b Lb99026 4Lb b STANDARDS MILITARY MIL-STD-372 - Welding, Gas Metal-Arc and Gas Tungsten-Arc, Aluminum Alloys, Readily Weldable for Structures, Excluding Armor. MIL-ST
8、D-662 - v60 Ballistic Test for Armor. (Copies of specifications, standards, handbooks, drawings and publications required by manufacturers in connection with specific functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Non-Government Dublication
9、s. The following documents form part of this document to the extent specified herein. Unless otherwise specified, the issue of the documents which are DoD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issue of documents not listed in t
10、he DODISS are the issues of the documents cited in the solicitation. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D897 - Standard Test Method for Tensile Properties of Adhesive Bonds. (Applications for copies should be addressed to the American Society of Testing and Materials, 1916 Race S
11、treet, Philadelphia, PA 19103.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents may also be available in or through libraries or other informational services.) 2.3 Order of Drecedence. In the eve
12、nt of a conflict between the text of this document and the references cited herein, the text of this document shall take precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. Unless
13、otherwise specified, the contractor shall furnish test-size armor plates (see 3.3.2) which shall be subjected to first article inspection (see 4.3). First article samples, properly marked with identifying information shall be representative of the unit to be furnished to the Government. All subseque
14、nt armor plates delivered to the Government shall conform to these samples in all of their pertinent physical and performance attributes. Any change in type or manufacturer of the bonding agent or change in the method of bonding shall require a resubmittal of the first article. 2 Licensed by Informa
15、tion Handling Servicesi MIL-A-b2Y73B 9999906 lb99027 352 3.2 Materials. Materials shall be as specified herein and in referenced specifications, standards, and drawings. Materials shall be free of defects which adversely affect performance or serviceability of the finished product (see 4.1.2). 3.2.1
16、 Q The contractor shall be responsible for using materials from Qualified Products Lists (QPLs) when applicable. Contractors inspection records shall specifically list all QPL items by number and date of the QPL, name of supplier, and part or drawing number(s). When materials are approved as qualifi
17、ed products, but not yet listed on the QPL, the contractor shall list the products by number and date of the approved document and name of supplier(s) (see 4.1.2). 3.2.2 Aluminum component. The aluminum component of the armor plate shall be aluminum alloy 5083 conforming to MIL-A-46027 (see 4.1.2):
18、3.2.3 Aramid laminate comDonent. The aramid fabric-reinforced plastic laminate component of the armor plate shall conform to MIL-L-62474, (see 4.1.2). 3.2.4 Bondinu auent. The sealing compound used to bond the, aluminum component to the aramid laminate component shall conform to type I or II, class
19、B-2 fo MIL-S-8802 (see 4.1.2). 3.3 Construction (fabrication). 3.3.1 Aluminum plate surface preparation. All surfaces of the aluminum alloy plate shall be thoroughly cleaned to remove all traces of follows (see 4.4.3): surface contaminants. Subsequently the plate shall be prepared as a. Sand-blastin
20、g the bonding surface or b. (1) Clean and treat the aluminum plate in accordance with class 1A of MIL-C-5541. (2) Prime with epoxy conforming to MIL-P-23377. Dry film thickness shall not be less than 0.0010 inch 0.025 millimeters (mm) and not more than 0.0015 inch (0.038 mm). 3.3.1.1 Cleanliness. Af
21、ter preparation in accordance with 3.3.1, the aluminum plate shall be kept in a dust, dirt, and moisture-free environment. The surface to be bonded shall not come in contact with hands or fingers (see 4.4.3). 3.3.2 ComDonent dimensions. 3.3.2.1 Test component dimensions. a. Ballistic test samples. T
22、est components shall be bonded 3 Licensed by Information Handling ServicesMIL-A-bZ473B W 9999906 Lb99028 299 W armor plate. The aramid pad, 20 inch by 20 inch (508mm by 508mm), shall be bonded to the aluminum plate, 24 inch by 24 inch (610mm by 610mm), so that there is a ?-inch (Slmm) border all aro
23、und. The thickness of the aluminum plate and number of aramid plies shall be as specified on the drawing or order (see 6.2). b. Bondind pull test samples. Test components shall be prepared to the dimensions shown in figure 1 using the bonding procedures of 3.3.3. The number of plies shall be as spec
24、ified on the drawing or order (see 6.2). 3.3.2.2 production comDonent dimensions. Component dimensions for armor plates produced for delivery under the contract shall be as specified on the drawing or acquisition document (see 6.2). 3.3.3 Bondina of comDonents. 3.3.3.1 Time element. The aramid lamin
25、ate pad shall be bonded to the aluminum plate within 24 hours of surface treatment (see 4.4.3). 3.3.3.1.1 Peel-Dlv removal. The peel-ply is to be removed from the bonding surface of the aramid laminate pad just prior to application of the bonding agent conforming to 3.2.4 (see 4.4.3). 3.3.3.2 Surfac
26、es. Bonding surfaces shall be re-checked for cleanliness prior to application of bonding agent. Either mating surface shall have a uniform thickness, 0.06 inch +0.03, -0 inch (1.5mm +0.76, -Omm), of the bonding agent applied over the entire area of the O bonding surface. The bonding agent shall have
27、 been thoroughly mixed in accordance with manufacturers instructions (see 4.4.3). 3.3.3.3 Matina. The components shall be mated and placed under pressure in a holding device capable of exerting a uniform pressure on the assembly (see 4.4.3). 3.3.3.4 Curina. The mated parts shall be kept under pressu
28、re as specified in the applicable drawing in the holding device and cured for not less than 24 hours, in ambient conditions of 77 degrees Fahrenheit ( F) +2“F 25 degrees Celsius (“C) +lCl . Higher temperatures up to 130.F (54OC) may be used to hasten cure, provided ballistic requirements are met (se
29、e 3.4.1 and 4.4.3). 3.4 Performance. 3.4.1 Ballistic resistance. The aluminum-aramid composite armor, for the thickness and plies indicated, shall meet the ballistic requirements of table I (see 4.4.4). 3.4.2 Bondina strenath. The bonding pull test samples shall exhibit a minimum strength of 340 pou
30、nds, without separation of the bonding agent from either the aluminum or aramid surfaces or adhesive failure. 4 Licensed by Information Handling ServicesMIL-A-62473B m 9999906 Lb99029 L25 W MIL-A-62473B(AT) I ALUMINUM I -1 -ARAMID -2.001 I ”4 1.00 Figure 1. Ecnding Fu1 1 Test SarnplE 5 Licensed by I
31、nformation Handling ServicesMIL-A-62473B m 9999906 1699030 947 TABLE I. Ballistic Reauirements. Minimum required Ballistic Limits CAL .50 (207 Grains) Framen Simulating Projectile (FSP)* at Oo obliquity Aluminum-Aramid Composite Armor, aluminum thickness 0.375 in (9.53mm). Aramid V5, Protection Aram
32、id VS, Protection (Plies) Ballistic Limit* (Plies) Ballistic Limit* 26 2619 31 2843 27 2665 32 2886 28 2710 33 2928 29 2755 34 2970 30 2799 35 3011 * In accordance with MIL-P-46593 * Average of three ballistic limits, each made on a separate composite armor specimen. 3.5 Finished armor. There shall
33、be no visual evidence of improperly bonded areas in the completed product (see 4.4.2.1). 3.6 WorkmanshiD. Workmanship shall be of such quality as to assure that armor plates furnished under the specification are free of defects that compromise, limit, or reduce performance in intended use (see 4.4.2
34、.1). 4. QUALITY ASSURANCE PROVISIONS 4.1 ResDonsibility for inmection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inpection requirements (examinations and test) as specified herein. Except as otherwise specified in the contr
35、act or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where
36、such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 PesDonslbll itv for ComDliance. All items shall meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall ins
37、pection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspec
38、tion, as part of manufacturing operations, is an acceptable practice to ascertain confomance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 6 Licensed by Information
39、 Handling ServicesI . NIL-A-bZ4738 9997706 Lb9903L 883 4. l. 2 Materials . To determine conformance to 3.2 through 3.2.4, MIL-A-62473B(AT) inmection and material certification records shall be maintained bv the- contractor. Records shall be subject to review by the Governmeit and shall include date,
40、 part, or characteristic identification, inspection results, and disposition of lot (accepted or rejected). Corrective action taken on noted defects shall be subject to approval by the Government. 4.1.3 wts and components. Component. and assemblies shall be inspected for comfonnance to requirements
41、of applicable drawings, specifications and standards. When applicable, inspection shall also be in accordance with Quality Assurance Provisions (QAPs). 4.2 Classification of inst3ections. The inspection requirements specified herein are classified as follows: a. First article inspections (see 4.3).
42、b. Quality conformance inspection (see 4.4). 1. Examination (see 4.4.2). 2. In-process examination (see 4.4.3). 3. Control test (see 4.4.4). 4.3 First article insDection. First article inspection shall be performed on preproduction or initial production samples as specified (see 6.2). Approval of th
43、e first article sample by the Government shall not relieve the contractor of the obligation to supply armor plates that are fully representative of those inspected as a first article sample. First article inspection shall be carried out on 4 test-sized samples having the dimensions specified in 3.3.
44、2.1. The contractor shall conduct all in-process examinations as specified in the written application inspection procedure (see 4.4.3), as well as visual examination for proper workmanship (see 4.4.2.1). The samples will then be forwarded to the test site designated by the acquisitioning activity (s
45、ee 6.2). The Government will test the ballistic samples against the requirements of 3.4.1 in accordance with 4.4.4.1 except that each first article sample must meet the V protection ballistic lilmit. Bonding pull test samples will be tested in accordance with ASTM D897. Any changes or deviation of t
46、he production units from the first article sample shall be subject to the approval of the contracting officer. 4.3.1 First article insDection failure. Failure of any first article sample to pass specified examinations or tests shall be cause for refusal by the Government to accept the product or con
47、duct additional inspections until the faults identified have been corrected o all armor plates produced. 4.4 Quality conformance insDection. 4.4.1 Samlina. 4.4.1.1 Lot formation. An inspection lot shall consist of all the armor plate assemblies of one type and part number, from an 7 Licensed by Info
48、rmation Handling ServicesMIL-A-b2473B m 7999906 1699032 71T m . identifiable production period, from one manufacturer, submitted at one time for acceptance. 4.4.1.2 SamDlinU for examination. All armor plate assemblies shall be examined (see 4 4 . 2 . 1) . 4.4.2 Qualitv conformance examination. 4.4.2
49、.1 Visual examination. To determine confomance to 3.5 and 3.6, armor plate assemblies shall be visually examined for proper workmanship. 4.4.2.2 Examination failure. If any armor plate fails to pass any examination specified herein, the Government will stop acceptance until evidence has been provided by the contractor that corrective action has been taken. 4.4.3 In-Drocess examination. To determine conformance to 3.3.1 through 3.3.3.4, the contractor shall initiate, perform and document on an essentially continuous basis, an in-process procedure consisting of pr
