1、MIL-C-7bA 13 W 777770b 0437346 O MIL-C-768A(OS) 28 February 1990 SUPERSEDING 4 May 49 JAN-C-768 (O S) MILITARY SPECIFICATION COPPER, POWDERED (FOR USE IN AMMUNITION) (METRIC) This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by
2、all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification describes one grade of powdered copper. 1.2 Part number. Part number for cataloging purposes under this specification is coded as follows: M0768 Specification 2. APPLICABLE DOCUMENTS x xx Granulation Pu
3、rity 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following standard forms a part of this document to the extent specified herein. Unless otherwise specified, the issue of this document is that listed in the issue of the Department of Defense Index of Specifications
4、and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Ordnance Station, Standardization
5、Branch (3730), Indian Head, Maryland 20640- 5000, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NA FSC 1370 DISTFUBUTiON STATEMENT A. Approved for public release; distribution is unlimited. Provided b
6、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- _I_ MIL-C-768A 13 777770b Oq37347 2 = MIGC-768A( OS) STANDARDS MILITARY MIL-STD-129 Marking for Shipment and Storage (Unless otherwise indicated, copies of federal and military specifications, standards, and han
7、dbooks are available from the Standardization Documents Order Desk Building 4D, 700 Robbins Avenue, Philadelphia, PA 191 11-5094.) 2.2 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the docum
8、ents 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 DoDISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM E
9、-1 1 Standard Specification for Wire-Cloth Sieves for Testing Purposes (DoD Adopted) (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) NATIONAL, MOTOR FREIGHT TRAFFIC ASSOCIATION, INC., AGENT National Motor Freig
10、ht Classification (Application for copies should be addressed to the National Motor Freight Traffic Association, Inc., Attn: Traffic Department, 2200 Mill Road, Alexandria, VA 22314.) UNIFORM CLASSIFICATION COMMITIEE AGENT Uniform Freight Classification, Rules and Regulations (Application for copies
11、 should be addressed to the Uniform Classification Committee Agent, Tariff Publication Officer, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These doc
12、uments also may be available in or through libraries or other informational services.) 2 , Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited
13、herein, 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 General material requirements. Powdered copper shall satisfy the requirements given herein and shall be
14、 made from electrolytic copper. 3.2 Total copper. Minimum, 99.0 percent by weight. 33 Granulation. Through No. 200 Standard sieve, minimum, 99.5 percent by weight. 3.4 Workmanship. The material shall be uniform in quality and free from foreign materials that could adversely affect its use. 4. QUALIT
15、Y ASSURANCE PROVISIONS 4.1 Responsibility for inspection, Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purc
16、hase 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 the specification where such inspect
17、ions are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. 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 inspection syste
18、m 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 inspection, as part
19、 of manufacturing operations, is an acceptable practice to ascertain conformance 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. 4.2 Lot size. The maximum lot size sh
20、all be 227 kilograms (kg). 43 Sampling. Three containers shall be selected, at random, from the lot for sampling purposes. If there are fewer containers in the lot, all containers shall be sampled. A 250-gram(g) sample representative of each container shall be placed in a clean, dry, rubber-stoppere
21、d bottle. The samples shall be thoroughly mixed to form a composite sample representative of the lot. The bottle shall be labeled to show the name of the material, manufacturer, plant, number of the contract or order, number of kilograms in the lot, and the lot number. 3 I Provided by IHSNot for Res
22、aleNo reproduction or networking permitted without license from IHS-,-,-. MIL-C-7bA 33 m 777770b 0437347 b 4.4 Tests. 4.4.1 Total copper. Transfer a weighed portion of approximately 2 g of the sample to a 200-milliliter(ml) electrolytic beaker. The weight of the specimen shall be determined on an an
23、alytical balance to the nearest 0.001g. Add 20 ml of 50-percent nitric acid solution and boil until the copper is dissolved and all oxides of nitrogen have been driven off. Add 10 ml of 50-percent sulfuric acid, dilute the solution to about 150 ml, and electrolyze. Use sand-blasted platinum electrod
24、es, the cathode being tared, and a current density of about 3 amperes per 100 square centimeters of cathode surface. When the deposition of the copper from the solution is complete, remove the electrolyte and immediately wash the cathode with distilled water. Rinse the cathode twice with ethyl alcoh
25、ol, then burn off the excess alcohol while moving the electrode back and forth through the air. Cool the cathode in a desiccator and weigh. Calculate the increase in weight as percent total copper. 4.4.2 Granulation. Attach a bottom pan to a U.S. Standard No. 200 sieve conforming to the requirements
26、 of ASTM E-11. Place 1OOg of the sample on the sieve, cover, and shake for 5 minutes by hand or mechanically by means of a shaker geared to produce 800 +- 15 gyrations and 150 f 10 taps of the striker per minute. Weigh any material remaining on the sieve and calculate the percentage passing through
27、the sieve. 4.4 3 Inspection of packaging. The sampling and inspection of the packing for shipment and storage shall be in accordance with the quality assurance provisions of the applicable container specification shown in section 5. The inspection of marking for shipment and storage shall be in acco
28、rdance with MIL-STD-129. 4.4.4 Lot acceptance or rejection. When the results of the tests in 4 show that the requirements of 3 and 5 have been met, the lot represented by the sample shall be accepted. Otherwise, the lot shall be rejected. . 5. PACKAGING 5.1 Preservation, Preservation shall be level
29、A, B, or C, as specified (see 6.2). 5.2 Packing. Unless otherwise specified (see 6.2), the material shall be packed in a container having a capacity of 4.54 kg and so constructed as to ensure acceptance by common or other carrier, for safe transportation, at the lowest rate to the point of delivery.
30、 Containers used shall comply with National Motor Freight Classification Rules and the Uniform Freight Classification Rules or regulations of other carriers applicable to the mode of transportation. 5.3 Marking. Marking shall be in accordance with MIL-STD 129. Marking shall include, but not be limit
31、ed to, the following: a. b. Manufacturers name Number and revision letter of this specification 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-6. NOTES MIL-C-7bA 13 m 7777706 01-127350 2 m MLC-768A(OS) c. Material designation d. Lot number e. Date
32、 of manufacture f. Net weight g. Purchase order number (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. This material is intended for use in pyrotechnic compositions. 6.2 Acquisition requirements. Acquisition document
33、s must spec the following: t a. b. Title, number, and date of this specification. Issue of DODISS to be cited in the solicitation and, if required, the specific issue of individual documents referenced (see 2.1.1 and 2.2). c. d. Preservation level, if required (see 5.1). Special packing or marking (
34、see 5.2 and 5.3). 6.3 Subject term (key word) listing. Electroanalysis Granula tion Purity 6.4 Changes from previous issue. Marginal notations are not used in this revision to identi& changes with respect to the previous issue due to the extensiveness of the changes. Preparing Activity Project No.( 1370-N288) Navy - OS 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
