1、SS-G-659a brch 1, 1967 SUPERSEDING Fed. Spec. SS-G-659 October 29, 1943 FEDERAL SPECIFICATION GRAPHITE, DRY (LUBRICATING) This specification was approved by the Commissioner, Federal Supply Service, General Services Administration, for the use of all Federal agencies. 1. SCOPE 1.1 Scope. 2. APPLICAB
2、LE WCUMENTS This specification covers a powdered lubricating graphite supplied in bulk quantities. 2.1 Specifications and standards, The following specifications and standards, of the issues in effect on date of invitation for bids, form a part of this specification to the extent specified herein. F
3、ederal Specifications: RR-S-366 - Sieve, Test. PPP-C-96 - Cans, Metal, 28 Gage and Lighter, Federal Standard: Fed. Std. No. 124 - Marking for Domestic Shipment (Civilian Agencies). (Activities outside the Federal Government may obtain copies of Federal Specifi- cations, Standards, and Handbooks as o
4、utlined under General Information in the Index of Federal Specifications and Standards and at the prices indicated in the Index. Index, which includes cumulative monthly supplements as issued, is for sale on a sub- scription basis by the Superintendent of Documents, U. S. Government Printing Office,
5、 Washington, D. C. 20402 The (Single copies of this specification and other product specifications required by activities outside the Federal Government for bidding purposes are available without charge at the General Services Administration Regional Offices in not less than 88 lumping, packed in ca
6、n sizes, as specified (see 6.2). graphite, prepared to conform to the requirements specified herein, may be furnished. 4.4.1, shall be not more than 2.5 percent. ance with 4.4.2, shall not exceed 2.5 percent. termined in accordance with 4.4.2, shall be not less than 95 percent, percent shall pass th
7、rough a 200 mesh screen; not less than 60 percent shall pass through a 325 mesh screen, when the graphite is tested in accordance with 4.4.3. not less than 5 nor more than 7, when tested in accordance with 4.4.4. percent when tested in accordance with 4.4.5. as defined in this specification. 3.7 Aci
8、dity, The pH value of the water soluble constituents in the graphite shall be 3.8 Mositure content. The loss in weight of the graphite shall be not more than 0.5 3.9 Workmanship. Graphite shall be free from abrasives or other undesirable impurities 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility
9、for inspection. Unless otherwise specified in the contract or pur- chase order, the supplier is responsible for the performance of all inspection require- ments as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or any commercial laboratory acceptable to
10、the Government. The Government reserves the right to perform any of the inspections set forth inthe specification where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements. sample for examination of end item (4.2.3). information identifying t
11、he purpose of the sample, name of product, lot number, date of sampling, and contract number. be numbered as such for purposes of inspection. of graphite taken at random from each lot of graphite. sample fails to meet any of the test requirements. 4.2.3 Sampling for examination of end iten. a sample
12、 of shipping containers fully prepared for delivery shall be selected from each lot of lubricant in accordance with MIL-STD-105 at inspection level I. 4.2 Sampling. The acceptance sample shall consist of a sample for tests (4.2.2) and a Samples shall be labeled completely with 4.2.1 2. 4.2.2 Samplin
13、g for tests. All graphite manufactured as one batch shall be considered a lot and shall The sample for tests shall consist of two one pound samples The lots are unacceptable if a A random sample of filled containers and 4.3 Examination. 4.3.1 End item. or lupping. The acceptable quality level (AQL)
14、shall be 2.5 percent defective, in accord- ance with MIL-STD-105. An inspection shall be made to determine that the packaging, packing, and marking comply with the requirements in section 5. Defects shall be scored in accordance with table I. For examination of interior packaging, the sample unit sh
15、all be one shipping container fully prepared for delivery, selected at random just prior to the closing operations. Sampling shall be in accordance with MIL-STD-105. prepared for delivery. end item inspection lot. per hundred units. Graphite shall be examined for dampness and any indication of cakin
16、g 4.3.2 Inspection of preparation for delivery. Defects of closure listed shall be examined on shipping containers fully The lot size shall be the number of shipping containers in the The inspection level shall be S-2 with an AQL of 4.0 defects 2 Provided by IHSNot for ResaleNo reproduction or netwo
17、rking permitted without license from IHS-,-,-I_ . , - - SS-G-bSqA 96 m 9949974 0009690 2 W SS-0-659a Table I. Classification of preparation for delivery defects Examine Markings (exterior and interior) Materia 1s Workmanship Contents (ex terior and interior container) Defects Omitted; incorrect; ill
18、egible; improper size, location, sequence, or method of application. Any component missing or damaged. Inadequate application of components such as incomplete closure of container flaps, loose Strapping, inadequate stapling. Distortion of container. Number per container if more or less than required
19、. Net weight exceeds requirements. 4.4 Test methods. 4.4.1 Ash content. Weight 1 gram (g.) of the graphite in a porcelain or platinum crucible, Heat in a muffle furnace, gradually raising the temperature to 1800F. (982OC.) until all combustible matter has been burned off. ignite at the same temperat
20、ure as a check for constant weight. of ash from the weight of the residue (see 3.3). ml. pyrex beaker, covered with a nickel sheet. a furnace at a temperature of 825O temperature for 16 hours. desiccator and weigh. weight. volatile matter and subtracting from 100. Cool in a ,desiccator, weigh, and a
21、gain Calculate the percentage 4.4.2 Volatile matter and graphite-carbon content. Weight 2 g of the graphite in a 100 Place the beaker containing the sample in 20OF. (441O + llOC.), and allow to remain at this The 16 hours need not necessarily be consecutive. Cool in a Calculate the percentage of vol
22、atile matter from the loss in The graphite-carbon content is obtained by adding the percentages of ash and (see 3.4 and 3.5). 4.4.3 Particle size (see 3.6). 4.4.3.1 Sieves. The following standard testing sieves with woven wire cloth having frames 8 inches in diameter and complying with RR-S-366 shal
23、l be used (see table 11). Table II. Standard testing sieves Sieve opening micron O. 0059 ,0029 325 .O017 4.4.3.2 Apparatus. A mechanical shaker, capable of vibrating the sieves 900 to 1000 times a minute and giving them 2 impacts each motor revolution, shall be used. of operation and reproducibility
24、 of results, an automatic electric time switch shall be connected to the shaker. bottom pan and a cover for the top sieve. transferred to the top sieve. Adhesive tape shall be run around the outside connecting edges of the sieves and the bottom pan, and the assembly placed on the mechanical sieve sh
25、aker to be shaken for 45 minutes. The residue on each sieve and in the bottom pan shall be removed and weighed; the amounts that passed through each sieve shall be calculated, The sum of all individually retained weights shall be used as the total weight of the original sample. distilled water to th
26、e flask and carry out the extraction fr 2 hours. with recently boiled distilled water to a volume of 250 ml. and determine pH value with a glass electrode (see 3.7). For ease 4.4.3.3 Method. The three sieves shall be.assemb.led in the proper order along with a A 50 g. sample shall be approximated an
27、d 4.4.4 Acidity. Place 10 g. of the graphite in a Soxhlet ext.ractor. Add 100 ml. of Dilute the extract 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SS-G-bSqA 76 = 7773774 0007b31 4 a SS-G-659a 4.4.5 Mositure. Moisture shall be determined in acc
28、ordance with ASTM D 1553 (see 3.8). 5. PREPARATION FOR DELIVERY 5.1 Packaging. Packaging shall be level A, B, or C, as specified (see 6.2). 5.1.1 Level A. Graphite in quantities, as specified (see 6.2), shall be packaged in 5.1.2 Level B (civil agencies). Bulk graphite shall be packaged in cans conf
29、orming to 5.1.3 Level C. Graphic shall be packaged in accordance with industry practice, 5.2 Packing. Packing shall be level A, B, or C, as specified (see 6.2). 5.2.1 Level A, B, or C (cansl. The graphite, packaged as specified in 5.1.1 and 5.1.2.1, shall be packed in accordance with the appendix to
30、 PPP-C-96. 5.3 Standard pack, civil agencies. The standard pack for civil agency procurement shall be as specified in paragraphs 5.1.2 and 5.2.1. 5.4 Marking. 5.4.1 Civil agencies, In addition to markings required by the contract or order, the cans conforming to PPP-C-96, type V. PPP-C-96, type V, c
31、lass 1, 2, or 4. interior packages and shipping containers shall be marked in accordance with Fed. Std. No. 123. 5.4.2 Military agencies. Marking of interior packages and shipping containers shall be in accordance with the appendix to PPP-C-96. 6. NOTES 6.1 Intended use. Graphite covered by this spe
32、cification is intended for use as a dry 6.2 Ordering data. Purchasers should select the preferred options permitted herein and lubricant or to be compounded with oils and greases. include the following information in procurement documents: (a) Title, number, and date of this specification. (5) Conta
33、iner sizes desired (see 3.1). (E) If natural or manufactured graphite is preferred (see 3.2). (2) Selection of applicable levels of packaging and packing desired (see 5.1 and (E) Quantity of graphite desireci in pounds (see 5.1.1). 5.2). 6.3 The sieves specified are a standard type, procurable by U.
34、 S. Sieves numbers from laboratory supply houses. The shaker specified is a Cenco Meinzer (Catalog No. 18480), manufactured by the Central Scientific Company, Chicago, Ill. MILITARY CUSTODIANS : Army - CE Navy - WEP Air Force - MOAhiA U.S. GOVEIWBNT PRINTING OFFICE : 1979 - 281-172/1235 Orders for t
35、his publication are to be placed with General Services Administration, acting as an agent for the Superintendent of Documents. See section 2 o$ this specification to obtain extra copies and other documents referenced herein. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
