1、3 1 MIL-P-b3252A (2) 9999906 2066823 169 i MIL-P-63252A (AR) AMENDMENT 2 14 Mav 1998 A SUPERSEDING MIL-P-63252A (AR) AMENDMENT 1 10 October 1996 MILITARY SPECIFICATION PROJECTILE, 155MM, HE, M795 LOADING, ASSEMBLING AND PACKING This amendment forms a part of MIL-P-63252A (AR), dated 28 September 199
2、5 and is approved for use by the US Army Armament, Research, Development and Engineering Center and is available for use by all Departments and Agencies of the Department of Defense. Entire Specification MIL-P-63252 Delete the word “penetrameter (s) “ and replace with “Image Quality Indicator(s) (IQ
3、Is)“ PAGE 1 * 2.1 Government documents. Delete “Government documents.“ and replace with “Documents“ * 2.1.1 Specifications, standards, and handbooks. Delete in its entirety and replace with the following: 1 of 9 AMSC N/A FSC 1320 DISTRIBUTION STATEMENT A. Approved for public release; distribution is
4、 unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-63252A (AR) AMENDMENT 2 “2.1.1 Non government publications. The following documents form a part of this document to the extent specified herein. American Society for Testing and Materi
5、als E1742 - Standard Practice for Radiographic Examination. (Copies may be purchased directly from the American Society American Society For Nondestructive for Testing and Materials). testing Inc, 1711 Arllingate Ln, P.O. Box 28518, Columbus, OH 43228-0518. American National Standards Institute CP 1
6、89 - Standard for Qualification and Certification of N,ondestructive Testing Personnel. (Copies may be purchased directly from the American Society for Nondestructive Testing Inc.) Nondestructive Testing Inc, 1711 Arlingate Ln, P.O. Box 28518, Columbus, Oh 43228-0518.“ American Society For PAGE 2 *
7、2.1.2 Other Government documents, drawings and publications. Add: “10542907 - Obturator“ PAGE 6 3.4.1 Matinq surfaces. Change: From: . “The mating surfaces of threads shall be free of caked explosive and all threads shall be free of foreign material. If a chemical cleaner is required, acetone or met
8、hylene chloride shall be used. Care shall be taken.to prevent the chemical cleaner from coming into contact with the charge and becoming entrapped in the projectile.“ 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-b3252A (2) 999990b 2066823
9、T3L i MIL-P-63252A (AR) AMENDMENT 2 TO : The mating surfaces of threads shall be free of caked explosive or exudate and all threads shall be free of foreign material. a chemical cleaner is required it shall be approved by the procuring agency. cleaner from coming into contact with the charge and bec
10、oming entrapped in the projectile.” If Care shall be taken to prevent the chemical PAGE 7 3.7 Exudation: Delete in its entirety. * 3.8.2 Protection of the rotating band. Add : “3.8.2.1 Rotating band. The surface of the rotating band lands shall be examined for surface defects, damage and contaminati
11、on. a. On the forward land, there shall be no evidence of .raised copper due to nicks, digs or damage ,of any kind and there shall be no paint or foreign matter on the outer diameter. b. On the aft three lands, any nicks or digs extending the 1/2 the land width or less are acceptable, provided the m
12、aximum band diameter is not exceeded. c. The surface of the overlay band shall have no cavities that exceed .238mm (3/32 inch) in the greatest dimension. d. On the surface of the overlay band the number of cavities equal to or less than .238mm (3/32 inch) in the greatest dimension shall not exceed o
13、ne (1) per 45 degree segment of the band. band is allowed a maximum of four cavities which exceeds .238mm (3/32 inch) in the largest dimension. However one (1) 6.45 square mm (1 square inch) area per 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
14、flIL-P-63252A (2) 9Ob 20bb824 938 m t MIL-P-63252A (AR) AMENDMENT 2 e. On the surface of the overlay band one tightly closed seam in the area of the weld start stop zone is allowed. f. Disbond (pick out) as indicated by a ragged appearance forward or aft of the rotating band is allowed. g. The overl
15、ay rotating band and band seat areas shall have no other discontinuities, cracks, lack of bonding, lack of fill or other metal defects other than those herein defined. h. Severity of defects shall be in accordance with visual standards PAGE 15 4.4.2.2 Projectile and Liner. Special a. Change:. From:
16、nPresence of explosive on exterior of shell body, threads and forward face.“ %Presence of explosive or exudate on exterior of shall body, threads and forward face.“ PAGE 16 4.4.2.3 Projectile, prior to assembly of supplementary charge. I 4 Provided by IHSNot for ResaleNo reproduction or networking p
17、ermitted without license from IHS-,-,-MIL-P-63252A (AR) AMENDMENT 2 Major 104 Swage missing or incomplete Delete: “Gage“ and Substitute: “Visual“ 105 Inside diameter of liner after swaging Delete: “Visual“ and Substitute: Gage“ 106 True position of inside diameter of liner, W/Pitch diameter of threa
18、d Delete: “W/Pitch diameter of thread“ and Substitute: “W/Minor diameter of thread“ 4.4.2.5 Projectile, prior to assembly of supplementary charge. Delete Minor 202 “Liner removable by hand“ in its entirety. PAGE 18 4.4.2.4 Projectile Assembly. Minor 201 Grommet missing, damaged or improperly assesmb
19、led. Change From: “Grommet missing, damaged or improperly assembled.“ TO : “Rotating band cover, damaged or improperly placed.“ PAGE 20 Add new paragraph 4.4.2.8 as included page 20a. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-pi O rl w rl I r
20、, E Zh (v m“(UNCVCO m mmmmmmm . . . . . . . H HHHHHHH H HHHHHHH H HHHHHHH d rlrldrlrlrlrl u a, a a, c z 5 -4 3 L3 k a, LI - a, E a -II l 6 (20a) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-b3252A (2) m 9Oh 20bb827 b87 iai MIL-P-63252A (AR)
21、AMENDMENT 2 * 4.4.3.1.1 Base separation. Delete in its entirety and replace with: ”4.4.3.1.1 Base separation. Projectiles showing the largest base separation as determined by radiographic examination prior to post cycle heat treatment shall be included in the post cycle heat treatment, placed in the
22、 coolest area of the igloo and retained for sectioning. A minimum of eight (8) samples shall be used for the first article and the first three (3) post cycle heat treatment lots have been accepted, samples shall be selected at the rate of one (1) out of seven hundred (700) projectiles of fraction th
23、ereof with the minimum sample size of tow (2) samples per post cycle heat treatment inspection lot. When a production lot has been rejected for base separation the sample size shall revert back to the minimum eight (8) samples per post cycle heat treatment lot. If insufficient number of samples are
24、available with base separation based on radiographs, a sufficient number of samples shall be randomly selected from the post cycle heat treatment lot to make up the required sample. Any projectile after sectioning which has base separation in excess of that permitted by the applicable requirement, s
25、hall be classed defective, and the entire post cycle heat treatment lot subjected to recycle. The test shall be performed as specified in 4.5.4 using equipment in accordance with 4.4.4. Any lot which fails after being post cycle heat treated three times shall be rejected. ” PAGE 23 4.4.3.3 Exudation
26、. Delete in its entirety. * 4.5.1.1 Determination of projectile cavitation. Delete “MIL-STD-453” and replace with ”ASTM E 1742” 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-63252A (2) 9999906 2066828 513 D r MIL-P-63252A (AR) AMENDMENT 2 P
27、AGE 24 * 4.5.1.2 Check of sensitivity of radiographic technique. Delete “MIL-STD-453* and replace with “ASTM E 1742“ two places. PAGE 26 Figure 2 top right note. Delete “MIL-STD-453“ and replace with “ASTM E 1742“ PAGE 27 4.5.3 Exudation. Delete in its entirety. 4.51.6 Op erator qualification. Delet
28、e “MIL-STD-410“ and replace with “ANST CP 189“ two places. * 4.5.2 Proving ground test. Delete “The sample shall be assembled with a dummy or inert loaded fuze.“ And replace with “The sample shall be assembled with a PD fuze set to SQ.“ Delete “Camera coverage shall be provided to observe the projec
29、tile in flight in order to record any malfunctions (see 6.12.“ and replace with “Camera coverage shall be provided to observe the projectile during initial flight to record any malfunctions.“ * 4.3.2.1 First article apd production samples. Delete “-54“ and replace with “-51“ two places. 6.81 Radiogr
30、aphic film sources. Delete in its entirety and substitute the following: 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-b3252A (2) m 9999906 20bb829 q5T MIL-P-63252A (AR) AMENDMENT 2 “6.8.1 Radioqraphic film sources. Approved list of film ty
31、pes and vendors for use in radiographing this projectile: Eastern Kodak Company 1187 Ridge Road, West Rochester, NY 14650 Film Type: AA, T, AX-1, MX Agfa Corporation NDT Systems 100 Challenger Road Ridgefield Park, NJ 07660 Film Type: Agfa D7 Fuji Industrial Radiographic Products Corporate Headquart
32、ers 200 North Avenue Larchmont, NY 10538 Film Type: Fuji 100“ The margins of this amendment are marked with an asterisk or vertical lines to indicate where changes (additions, modifications, corrections, deletions) from the previous amendment were made. This was done as a convenience only and the Go
33、vernment assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous amendment. Custodian Army-AR Preparing activity: Army-AR (Project-1320-0009) 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
