ARMY MIL-G-47316 A-1992 GRAPHITE MOLDED FOR HIGH TEMPERATURE APPLICATIONS《用于高温的模制石墨》.pdf
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1、MIL-G-473LbA 93 m 99999Ob 0528538 5 m INCH-POUND MIL-G-47316A (MI) 26 May 1992 SUPERSEDING MIL-G-47316 (MI) 14 August 1987 MILITARY SPECIFICATION GRAPHITE, MOLDED, FOR HIGH TEMPERATURE APPLICATIONS This specification is approved for use by the U.S. Army Missile Command, Department of the Army, and i
2、s available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification defines the requirements of one .type of molded graphite for high temperature applications. 1.2 Classification. The molded graphite is classified using the following styles: Style
3、 A - rectangular blocks Style B - cylindrical billets. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, U.S. Army Missile Command, ATTN: AMSMI-RD-SE-TD-ST, Redstone Arsenal, AL 35898-5
4、270 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 9390 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted w
5、ithout license from IHS-,-,-MIL-G-473LbA 93 m 9999906 0528539 7 m c . =. MIL-G-47316A (MI) 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to.the extent specified her
6、ein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). STANDARDS MILITARY MIL-STD-129 - Marking for Shipment and Storage MIL-
7、STD-130 - Identification Marking of US Military Property (Unless otherwise indicated, copies of the federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Ave., Philadelphia, PA 19111-5094.) 2.2 Non-Government
8、publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents
9、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 C 651 - Flexural Strength of Manufactured Carbon and Graphite Articles Using Four-Point Loading at Room Temperature, Standard Test Method for Practice
10、for ASTM D 3951 - Commercial Packaging, Standard (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4 c MIL-G-4 7
11、 31 6A (MI ) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of precedence. In the event of- a conflict b
12、etween 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 obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.21, a sa
13、mple shall be subjected to first article inspection (see 6.3) in accordance with 4.4. 3.2 Material. The material shall be graphite formed by the molding process from petroleum coke having a particle size not greater than 0.006 inch combined with coal tar pitch (see 4.7). blocks and cylindrical bille
14、ts shall be as specified in the contract or order (see 6.2) . 3.2.1 Dimensions. The dimensions of the graphite rectangular 3.3 ProDerties. -A - 3.3.1 Apparent density. Apparent density of the graphite shall be not greater than 0.065 nor less than 0.060 ounce per 0.061 - cubic inch (see 4.6.2). 3.3.2
15、 Specific resistance. Specific resistance of the graphite shall be not greater than 13.0 x ohm - centimeter (ohm - cm) with the grain and not greater than 17.0 x ohm - cm across the grain (see 4.6.3). 5 3.3.3 Flexural strength. Flexural strength of the graphit shall be not less than 2600 pounds forc
16、e per square inch (lbf/in ) with the grain and not less than 2400 lbf/in2 across the grain (see 4.6.4). 3.3.4 Ash content. Ash content of the graphite shall be not greater than 0.25 percent (see 4.6.5). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,
17、-,-MIL-G-4731bA 93 m 99999Ob 0528543 5 m * + MIL-G-47 31 6A (MI) 3.4 Marking. Each block or billet of graphite specified herein shall be permanently marked in accordance with MIL-STD-130 with the following information: a. Title, number and date of this specification b. Part number c. Suppliers name,
18、 address, and material designation. d. Purchase order number e. Lot number f. Weight and size of block or billet. 3.4.1 Identification. Rectangular blocks and cylindrical billets shall be color-coded red on each end. The with-grain direction shall be marked with an arrow in figure 1. accordance with
19、 c TYPICAL o SPECIMEN WITH GRAIN NOTES : 1. -Denotes with-grain direction 2. Specimen A with grain 3. Specimen B across grain FIGURE 1. Graphite block and billet test specimens. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-47316A (MI) 3.5
20、Workmanship. The graphite shall be manufactured to assure uniform material free from visual cracks or other defects that would prevent its use for the purpose intended. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, th
21、e contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirem
22、ents specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for co
23、mpliance. 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 system or quality program. inspection requirements in the specification shall not relieve the contractor of the responsibility
24、 of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submissio
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