1、MIL-PRF-50204D W 9999906 2055995 213 - 1 INCH POUND MIL-PRF-50204D (AR) 23 SeDtember 1997 SUPERSEDING MIL-S-50204C (AR) 21 December 1993 PERFORMANCE SPECIFICATION SUPPORTS, STRUCTURAL (FOR USE IN AMMUNITION CONTAINERS) This specification is approved for use by the U.S. Army Armament Research, Develo
2、pment and Engineering Center, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements, examinations and tests for structural supports for use inside ammunition containers. 2. APPLICABLE DOCUMENTS 2.1 Genera
3、l. The documents listed in this section are needed to meet the requirements specified in sections 3 and 4 of this specification. This section does not include documents in other sections of this specification or recommended for additional information or as examples. While every effort has been made
4、to ensure the completeness of this list, document users are cautioned that they must meet all requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use
5、 in improving this document, should be addressed to: Commander, U.S. Army TACOM- ARDEC, ATTN: AMSTA-AR-EDE-S, Picatinny Arsenal, NJ 07806-5000 by using the Standardization Document Improvement Proposal (Di) Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 8135 DISTRIBUTION
6、 STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-50204D 999990b 205599b IST MIL-PRF-50204D (AR) - 2.2 Government documents. 2.2.1 SDecifications. standards and handbooks. Th
7、e 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 listed in the issue of the Department of Defense Index of Specifications and Standards (DODISC) and supplement thereto,
8、 cited in the solicitation (see 6.2). STANDARDS DEPARTI“ OF DEFENSE MIL-STD-810 - Environmental Test Methods and MIL-STD-1916 - DOD Preferred Methods for Acceptance Engineering Guidelines of Product (Unless otherwise indicated, copies of the above specifications, standards and handbooks are availabl
9、e from DODSSP, Customer Service, Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5049.) 2.3 Non-Government nublications. The following documents form a part of this document to the extent specified herein. :Unless otherwise specified, the issues of the do
10、cuments which are DOD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DDISS are the issues of the documents cited in the solicitation (see 6.2) AMERICAN SOCIETY FOR TESTING AND MATERIALS ASTM Bll7 -
11、Salt Spray (Fog) Testing, Method of (Application for copies should be addressed to the American Society for Testing and Materials, 100 Bar Harbor Drive, West Conshohocken, PA 19428-2959). 2.4 Order of Drecedence. In the event of a conflict between Nothing in this the text of this document and the re
12、ferences cited herein, the text of this document takes precedence. document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified in the contract or purchase order (see 6-21, a sample shall be subjected t
13、o first article inspection in accordance with the technical provisions herein (see 4.2). 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-PRF-50204D I 9999906 2055997 O96 m MIL-PRF- 5 O2 04D (AR) 3.2 Materials. Any material(s1 that meets the re
14、quirements specified herein may be used. 3.3 Product acceotance. Quality plans and procedures used to assess conformance to the contract and product specifications shall be in accordance with MIL-STD-1916. 3.4 ODeratins recniirements. Each support shall provide the following functional, operational,
15、 and performance capabilities. 3.4.1 Color. Unless otherwise specified, the finished support shall be of a dark coloration. Black, gray, brown, or dark green are acceptable. The support may also be of natural kraft paper coloration if constructed of kraft paper. the following interfaces. 3.5 Interfa
16、ce reauirements. The support shall accommodate 3.5.1 Phvsical characteristics. The finished support must be dimensionally stable to interface with the ammunition container and its contents and not affect form, fit, and function of the container or item(s). The dimensions and tolerances of the finish
17、ed part will be in accordance with the interface control drawing(s) or detailed design drawings specified in the contrac t. 3.6 Ownership and suonort reauirements, Each support shall possess the following life-cycle ownership characteristics. 3.6.1 Safety. The support shall be physically safe to ope
18、rate and handle with no additional safety concerns beyond that associated with item, container, and supports during storage, transport, and handling. 3.6.2 Recvcled, recovered, or environmentallv Dreferable materials. Recycled, recovered, or environmentally preferable materials should be used to the
19、 maximum extent possible provided that the materials meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.7 Ooeratina environment recauirements. Each support shall be operable under the following environmental conditions without da
20、mage or loss in performance. 3.7.1 Water absomtion. The finished component shall have a maximum water absorption of 10 percent by weight and shall show no evidence of cracking, splitting, warping, or breaking after being submerged under water for 48 hours minimum. 3 Provided by IHSNot for ResaleNo r
21、eproduction or networking permitted without license from IHS-,-,-MIL-PRF-50204D = 9999906 2055998 T22 MIL-PRF-50204D (AR) 3.7.2 Thermal stress crackinq resistance. The finished part shall not crack, split, warp, break, become tacky or ooze or otherwise degrade when exposed to 160 degrees Fahrenheit
22、duration of 100 hours minimum. The parts shall meet all dimensional requirements when returned to ambient conditions after exposure to high temperatures. for a 3.7.3 Rouah handlincr performance. 3.7.3.1 Impact resistance (3 Foot). The structural component shall not crack, split, or break when subjec
23、t to 3 foot drop testing. 3.7.3.2 Repetitive shock resistance. The structural component shall not crack, split, or break when subject to loose cargo testing. 3.7.3.3 ImDact resistance (7 Foot). The structural component shall not crack, split, or break when subject to 7 foot drop testing. 3.7.4 Salt
24、smav. The finished component shall be subjected to a 5 percent solution for 96 hours minimum and shall not corrode or affect form, fit and function. 3.7.5 Funms. The support shall not exhibit excessive fungi :growth after being subject to conditions favorable for fungi development, namely high humid
25、ity, warm atmosphere, and presence of inorganic salts. 4. VERIFICATION 4.1 General ?xovisions. The inspections (examinations and tests) herein shall be performed to determine whether or not the item conforms to section 3 of this specification. 4.1.1 Classification of inswctions. The inspection requi
26、rements specified herein are classified as follows: a. First article inspection (see 4.2) b. Conformance inspection (see 4.3). 4.1.2 IncDection conditions. Unless otherwise specified, all inspections shall be performed in accordance with the test conditions specified herein. 4.1.3 Classification of
27、characteristics. For examinations and tests cited herein or when required by contract; critical, major, and minor characteristics are as defined in Section 3 of MIL-STD-1916. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-50204D 9999906 20
28、55999 b9 . MIL-PRF-50204D (AR) TABLE i. Requirement/verification matrix VERIFICATION LEVEL (VLI VERIFICATION METHODS VERIFICATION CLASSES N/A - NOT AVAILABLE A = FIRST ARTICLE 1 - ANALYSIS B = CONFORMANCE 2 - DEMONSTRATION 3 - EXAMINATION 4 - TEST I I I I I I I I I 4.2 First article inspection. 4.2.
29、1 Submission. The contractor shall submit a first article sample as designated by the Contracting Officer for evaluation in accordance with provisions of 4.3.2. The first article samples shall consist of a minimum of 12 sample structural supports to perfom the specified examinations and tests when r
30、equired by contract (see 6.2). 4.2.2 Inspections to be performed. As determined by the Government, the first article assemblies, components and test specimens may be subjected to any or all of the examinations and tests specified (see Table I). Unless otherwise specified, all the inspections shall b
31、e performed. 4.2.3 Rejection. If any test specimen fails to comply with any of the applicable requirements, the first article sample shall be rejected. terminate inspection upon any failure of a test specimen to comply with any of the requirements. The Government reserves the right to 5 Provided by
32、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-50204D M 9Ob 2056000 289 MIL-PRF-SO2 04D (AR) * 4.3 Conformance inspection. 4.3.1 Inspection lot formation. Lot formation shall be in accordance with Section 4 of MIL-STD-1916. 4.3.2 Classification of chara
33、cteristics. Conformance examinations and tests are specified in Table I. When cited herein, attribute sampling inspection shall be conducted in accordance with MIL-STD-1916 using the verification levels stated in Table I unless otherwise specified in the contract or purchase order. 4.3.3 Testinq. 4.
34、3.3.1 Conditioninq. All configurations (container, item, structural component(s) and supporting dunnage) shall be conditioned to a temperature of -65 (plus or minus 5 degrees) Fahrenheit or +160 (plus or minus 5 degrees) Fahrenheit for 24 hours prior to any rough handling testing. must begin within
35、15 minutes after removal of the configuration from the conditioning chamber. within 35 minutes of start. Each series of tests All tests must be completed 4.3.3.2 Methods of insx,ection (see 6.3). 4.4 op eratina reauirements verification. Complete each verification under 4.4. 4.4.1 Color verification
36、. Unless otherwise specified, the finished support shall be visibly inspected to insure a dark coloration. Black, gray, brown, or dark green are acceptable. If the support is constructed of kraft paper products, the natural “kraft“ color is also acceptable and will be visibly inspected for. 4.5 Inte
37、rface reauirements verification. Complete each verification under 4.5. 4.5.1 Phvsical characteristics. The finished support shall be examined for compliance with the applicable interface control drawings (see 6.2) using appropriate inspection equipment. 4.6 Ownershix, and sumort reuuirements. Comple
38、te each verification under 4.6. 4.6.1 Safety. The finished support shall be visually inspected to ensure they are free of hazardous burrs, nicks, sharp edges, foreign materials, or other imperfections posing physical danger to operators. c 4.7 m eratinq Environment Requirements. Complete each verifi
39、cation under 4.7. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-50204D m 9999906 2056003 115 m a MIL-PRF- S O 2 O 4D (AR) 4.7.1 Water absorption. Under ambient atmospheric conditions, weigh 6 individual finished components. Immediately th
40、ereafter immerse the components in clear tap water (pH 6.5 to 7.5) at room temperature for 48 hours minimum. If necessary, weight down the components to ensure total submersion. After removing the components from the water, immediately surface dry the specimens and reweigh them. Compute the moisture
41、 gain as a percentage of pre-immersion weight. 4.7.2 Thermal stress crackina resistance. Prior to testing, visually inspect 6 finished components for any anomalies such as cracking, pitting etc. that have already passed dimensional examination. Subject the components to 100 hours minimum at 160 plus
42、 or minus 5 degrees Fahrenheit. Immediately following the time period, while still warm, visually examine each component for evidence of cracks, split, warping or other deformations. When the components return to ambient conditions perform dimensional check and insure the component is within toleran
43、ce. 4.7.3 Roush handlina Derformance. Test samples for testing defined in 4.7.3.1, 4.7.3.2 and 4.7.3.3 will be conditioned in accordance with 4.3.3.1. The testing will be performed sequentially and at the two temperature extremes. Each temperature sequence will require 6 complete configurations (con
44、tainer, item(s), structural support(s), and associated dunnage, see 6.2). The first test will be a series of 3 foot test, the container will be accessed and the structural component examined for performance as defined in the applicable requirement. conditioned in accordance with 4.3.3.1. After prope
45、r conditioning at the appropriate temperature extreme, loose cargo testing will be performed in accordance with 4.7.3.2. conclusion of the test, the containers will be accessed and the structural components examined for performance as defined in the applicable requirement. and conditioned in accorda
46、nce with 4.3.3.1. conditioning at the appropriate temperature extreme, 7 foot drop testing will be performed in accordance with 4.7.3.3. completion of the test, the containers will be accessed and the structural components examined for performance as defined in the applicable requirement. drop testi
47、ng in accordance with 4.7.3.1. Upon conclusion of the The containers will then be re-packed and Upon The containers will then be re-packed After proper Upon 4.7.3.1 Impact resistance (3 foot). The orientations of the drops will be consistent with Figure 1. container will be dropped in all the approp
48、riate orientations depending on whether the configuration is cylindrical or rectangular. The container will be suspended in such a way that the lowest portion of the container (the desired impact area) is 3 feet from the impact surface. The container will then be released and allowed to fall uninhib
49、ited to the impact surface. The impact surface will be of a non-yielding substance similar to concrete or steel. Each fully loaded 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-50204D M 9Ob 2056002 051 c MIL-PRF-SO204D (AR) - 4.7.3.2 Repetitive shock resistance (loose carao). The loaded container shall be placed on the steel mounting surface (table) of the vibration equipme
