1、1. SCOPE 1.1 This I XIL-G-14931 (MU) 22 November 1968 MILITARY SPECIFICATION GREASE, SILICONE FOR USE WITH AMMUNITION I lilitary Specification covers one type of silicone grease.- for use in ammunition (see 6.2). 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of i
2、nvitation for bids or request for proposal form,a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL QQ-C-501 - W-L-791 - STANDARDS XILITARY MIL-STD- 105 MIL-STD-10 9 MIL-STD-129 MIL-STD-650 Copper, Bars, Plates, Rods, Shapes, Sheets and Strips Lubricants, Liquid, Fuel
3、s, and Related Products; Method of Testing - Sampling Procedures and Tables for Inspection by Attributes (ABC-STD-105). - Quality Assurance Terms and Definitions - Marking for Shipment and Storage - Explosive: Sampling, Inspection and Testing (Copies of specifications, standards, drawings and public
4、ations required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer). PUBLICATX ONS D-972 - Evaporation Loss of Lubrication Grease and Oils 3-942 - Oxidation Stability of Lubricating Greases by the
5、3-1264 - Water Washout Characteristics of Lubricatinq Greases B-2?0 - Sampling Petroleum and Pro3uc“s THIS DOCUMENT CbNTliNS .7 . PAGES, FSC: 1375 Oxygen Bomb Method t- - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.* MIL-G-14931 (MU) I (Applic
6、ation for copies should be addressed to the American Society for Testing Materials, 1916 Race Street, Philadelphia, Pennsylvanial 19103 , 1 3, REQUIREMENTS 3.1 Composition,-The grease shall be a smooth homogeneous mixture of methyl phenyl silicone fluid and a lithium soap free from any abrasive or o
7、ther undesirable fillers as impurities. Minor proportions of additives to improve oxidation stability, rust inhibition, mechanical stability, texture and wear resistance may be included. 3.2 and shall be of a smooth consistency, free from lumps or granulation, when tested as specified in 4.3.1. Appe
8、arance,-The grease shall be completely homogeneous 3.3 perfume odor. 3.4 copper, shall show no decomposition, change in color, or con- sistency. black discoloration, etching or pitting. the copper strip shall not be considered as evidence of corrosion when tested as specified in 4.3.3. with Table I
9、when tested as specified in 4.3.4. Odor.-The grease shall be free from any rancidity or Corrosion Resistance. -The grease, when tested with The copper strip shall show no evidence of green or A brown stain on 3.5 Viscosity (Consistency).-The viscosity shall comply Degrees, Fahrenheit (OF) TABLE I Vi
10、scosity cps 77OF 165OF -65OF 80,000 to 110,000 60,000 to 100,000 250,000 Maximum (Max. 3.6 Specific gravity.-The specific gravity at 77OF-Shall be 0.97 + - 0.02 when tested as specified in 4.3.5. 2 .- *At Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,
11、-,-MIL-G- 14 9 3 1 (MU) 3.7 2vaporation.-The evaporation at 2OO0F for 24 hours shall be 110 more than 2 percent, max., when tested as specified in 4.3.6. 3.8 Bleeding.-The bleeding at 2OO0F for 24 hours shall be no nore than 25 percent, ma., when tested as specified in 4.3.7. 3.9 Oxidation Stability
12、.-The oxidation stability at 200F for 100 hours shall be no more than 5 psi max. when tested as specified in 4.3.8. 3.10 Water resistance.-The water resistance at 100F shall be no more than 10 percent max., when tested as specified in 4.3.9. 3.11 Dirt Count.-The dirt count of the grease shall not ex
13、ceed the amount specified in Table II when tested as specified in 4.3.10. TABLE II Microns or above 25 75 125 Per cubic centimeter Max. 7500 1600 None 4. QALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection.-Unless otherwise specified in the contract or purchase order, the supplier is respo
14、nsible for the performance of all inspection require- ments as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Govern
15、ment. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Reference shall be made to Standard MIL-STD-109 in order to define terms used herei
16、n. 3 i- - *- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-z MIL-G-14931 L3 9999906 0298327 2 .a MIL-G-14 9 3 1 (MTJ) panied by a provided is subni. tted : a. the quality b. performed. d. C. 4.1.1 Submission of product.-At the time the completed lo
17、t of product is submitted to the Government for acceptance, the contractor shall supply the following information accom- certificate which attests that the information .- correct and applicable to the product being A statement that the lot complies with all of assurance provisions specified witkin t
18、his specification. Nurnber of units of product inspected. Results obtained, by defect code, for all inspections Drawinq, specification number and date, together with an identification- and date of changes. e. Certificates of conformance on all material purchased by the contractor when such material
19、is controlled by Government or commercial specifications referenced in any of the contractual document. f. Number of items in the lot. g. Date submitted. The certificate shall be signed by a responsible agent of the certifying organization. The initial certificate submitted shall be substantiated by
20、 evidence of the agents authority to bind his principal. will not be required with subsequent certificates unless, during the course of the contract, this authority is vested in another Substantiation of the agents authority . agent of the certifying organization. 4.2 Inspection provisions 4.2.1 Lot
21、 formation.-The term “lot“ as used throughout this specification refers to an inspection lot, which is defined as an essentially homogeneous quantity of material from which a representative sample is drawn and shall not be construed to represent any prior or subsequent quantities presented for inspe
22、ction. A lot shall consist of one or more batches produced by one manufacturer, in accordance with the same specification, and specification revision under one continuous set of operating conditions. Each lot shall consist of that quantity of material which has been subjected to the same unit chemic
23、al or physical process intended to make the final product homogeneous. The classification of defects shall be in accordance wit3 Standard MIL-STD-105. 4 _. Q Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-: 9 . I 4.2.2 Sampling.-The sample shall be
24、selected in accordance wich ASTM Designation D 270. If any sample fails to Fass the requirement of paragraph 3, the lot shall be rejected. 4.3 Test methods and procedures 4.3.1 Appearance, Minor defect (see 6.31, Code No. OlOOl.-A suitable portion of the grease shall be worked with a spatula on a cl
25、ean glass. During working, the grease shall show no nonuniformity and shall spread with a straight edge to a smooth, glossy, level surface. 4.3.2 Odor, Minor defect, Code No. 02001.-A nasal analysis shall be made of the grease. 4.3.3 Corrosion resistance, Major defect, Code No. 03001.- Prepare a str
26、ip of clean copper conforming to specification QQ-C-501, 1.75 by 0.25 by 0.02 inch, bent midway between the ends at an angle of 450. Dip the copper strip for 15 to 20 seconds into an aqueous solution containing 25 percent by weight H2SO4 and 25 percent by weight HNO . in distilled water and give a b
27、right dip a or 15 seconds in an aqueous solution of approximately 2 percent H2SO4 by weight and 5 percent K2Cr207 by weight. Wash well in distilled water and dry for 30 minutes in an oven maintained at approximately 212OF. (The metal must not be touched with the fingers at any time during or after c
28、leaning). the oven and cool to room temperature. Place 4 grams of sample grease in a glass dish, insert the copper strip horizontally into the grease so that one-half of the copper strip is immersed and place the test dish into a Norma-Hoffman bomb at 210 + 5OF., and 110 + 0.25 pounds per square inc
29、h (p.soi) initial oxygen pressure. At the end of 20 hours of test, remove the glass dish. Visually examine the copper strip and the sample of grease for compliance with 3.4. Wash immediately Remove the copper strip from 4.3.4 Viscosity, Major defect, Code No. 04001.-The viscosity shall be determined
30、 with a Brookfield RVF Viscosimeter with a No. 7 spindle at 4 rmp. The spindle shall be heated or cooled in the grease, depending upon the temperature at which the viscosity is being determined. The test shall be performed in a small cold box at -6SOF. The sample shall not be disturbed for at least
31、24 hours before the test. The readings shall be taken 1 to 2 minutes after starting the motor. 5 I I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-14731 13 M 799990b 0278329 b 1 XIL-G-14931 (MU) 4.3.5 Specific gravity, Major defect, Coce No.
32、05001.-The specific gravity shall be determined in accordence with Method 203.:! of Seandard YIL-STD-650. 4.3.6 Evaporation, Major defect, Cose No. 00001.-The. evaporation shall be determined in accordance with ASTM Designatiop 9 972 except that the time shall be 24 hours at 2O0F. 4.3.7 Bleeding, Ma
33、jor defect, Code No. 07001.-The bleeding shall be determined in accordance with Method 321.2 of Specification W-L-791, except that the test shall be conducted at 200F for 24 hours. 4.3.8 Oxidation stability, Major defect, Code No. 08001.-The oxidation stability shall be determgned in accordance with
34、 ASTM Designation D 942, except that the test shall be conducted .e at 200F for 100 hours. 4.3.9 Resistance, Major defect, Code No. 09001.-The water resistance sha.11 be determined in accordance with ASTM Designation D 12C4 a”, 100F. 4.3.10 Dirt count, Major defect, Code No. 11001.-The dirt count sh
35、all be determined in accordance with Method 3005 of Specification W-L-791. 5. PREPARATION FOR DELIVERY 5.1 Packing.-The silicone grease shall be packed to insure adequate protection from damage during shipment from source of supplv to the first receiving activity. shall comply with common carrier ru
36、les and regulations applicable to the mode of transportation. The shipping containers 5.2 Marking.-In addition to any special narking required in the contract or order, unit packages and shipping containers shall be marked in accordance with Military Standard MIL-STD-129. 6 Provided by IHSNot for Re
37、saleNo reproduction or networking permitted without license from IHS-,-,-=. .b 6. NOTES NIL-G-i4931 (MU) 6.1 Ordering S Title, the following: data.-Procurement documents shall specify number and date of this specification. 6.2 Intended use.-The material covered by this speclfic,tion is intended for
38、use as a water-proofing agent in the M605 Mine fuze. 6.3 Inspection code numbers . -The five digit code numbers assigned to the inspections herein are to facilitate future data collection and analysis by the Government. Custodian : ARMY-MU Preparing Activity: ARMY-MU Project Number: 1375-A-O16 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
