1、f /f-a/%-S MIL-P-63203 (2) 13 777770b 03rt5433 7 MIL-P-63203 (AR) AMENDMENT 2 17 November 1987 SUPERSEDING AMENDMENT 1 23 January 1985 - MIL I TARY SPEC IF I CAT I ON PROJECTILE, 155MM, HE, RA, M549A1 AFT (M37 EXTRUDED) PROPELLANT GRAIN FOR This amendment forms a part of Military Specification MIL-P
2、-63203, dated 13 September 1983 and is approved for use within the US Army Armament, Munitions and Chemical Command and is available for use by all Departments and Agencies of the Department of Defense. PAGE 4 3.5: Add the following new sub-paragraphs: “3.5.3 Alternate Test Method. 3.5.3.1 Plus 140F
3、. The average of three (3) maximum compression readings from each lot shall be no less than 306 pounds and the average of three (3) deformation readings shall be no less than 48 percent when tested as specified in 4.5.5.1. 3.5.3.2 Minus 40F. The average of three (3) maxisum compression readings from
4、 each lot shall be no less than 8,427 pounds and the average of three (3) deformation readings shall be no less than 23 percent when tested as specified in 4.5.5.1.“ 3.8: Add new paragraph as follows: 3.8 Proving ground test (First Article Only). When tested in accordance with 4.5.4 all the range an
5、d safety requirements of MIL-P-50578 shall be met. AMSC N/A 1 of 5 FSC 1320 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-63203 (2) 13 = 7977706 03451434 7 MIL-P
6、-63203 (AR AMENDMENT 2 PAGE 5 4.3.1.1: Delete in its entirety and substitute the following: “4.3.1.1 Process changes. The first article tests and inspections cited herein will qualify the particular processing procedures. Any major processing change made subsequent to the manufacture of the first ar
7、ticle samples must be reviewed by the design agency who at their discretion may require part OK all of the first article repeated.“ 4.3.2.1.2: Delete “for information only“. 4.3.2.2: Delete in its entirety. PAGE 8 4.3.2: Table I, Under Ballistic test: Change “3.2“ to “3.8“. PAGE 9 4.4.1: Change “or
8、more than one month scheduled production . . .I1 to “or more than two months scheduled production . . .I. I PAGE 13 4.4.2.4: Add the following Critical defect: “1 Radiographic inspection (A) loo%, 3.3.1, 4.5.1.1“. Delete: Major 103 in its entirety. Add the following: “Note A. May be done prior to sp
9、iral wrap and OD machining.“ PAGE 15 4.4.2.6: Add the following Critical defect: “1 Excessive cracks, foreign material, OK cavitation 100% 3.3.2 Visual“. Delete: Major 101 in its entirety. Major 105: Add Note ll(b)lg to the paragraph reference. Add the following to the notes section: “Note b. Grain
10、segments froin the same lot may be mixed to meet weight requirements provided the minimum web requirement is met.“ 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-63203 (2) 13 7999706 03Li5435 O MIL-P-63203 (AR) AMENDMENT 2 PAGE 18 4.4.3.2.2:
11、 Delete in its entirety -and substitute the following: “4.4.3.2.2 Grain inspection - Critical Defect. One sample of a completed grain shall be selected from each sublot produced and radiographed. A sublot shall be defined as a maximum of eight unsawed billets consecutively extruded and loaded onto a
12、 single grain buggy. In the event that the sample grain fails to meet the requirements of 3.3.1, the entire sublot shall be x-rayed and any additional grains failing to meet the requirement of 3.3.1 shall be removed from the lot. This test shall be conducted in accordance with 4.5.1.2. 4.4.3.3: Dele
13、te 4.4.3.3.1 and 4.4.3.3.2 and substitute the following: “4.4.3.3.1 Plus 1400F - Major Defect. Three (3) samples will be randomly selected from the lot. If possible, no two samples will be taken from the same billet. These samples shall be tested for maximum compression load and deformation as speci
14、fied in 4.5.5 or 4.5.5.1. The lot shall be rejected if the average of the three specimens from any billet fails to meet the requirements of 3.5.1 or 3.5.3.1. 4.4.3.3.2 Minus 40F - Major Defect. Three (3) samples will be randomly selected from the lot. If possible, no two samples will be taken from t
15、he same billet. These samples shall be tested for maximum compression load and deformation as specified in 4.5.5 or 4.5.5.1. The lot shall be rejected if the average of the three specimens from any billet fails to meet the requirements of 3.5.2 or 3.5.3.2.“ PAGE 19 4.5.1.1: First sentence: Change “p
16、arallel to“ to “perpendicular to“. 3 I- . - _I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-63203 (2) 13 999790b 03L1543b 2 W MIL-P-63203 (AR) AMENDMENT 2 4.5.1.1.1: r- Second sentence: Delete “photograph selected defects!. Add the following
17、 at the end of the paragraph: “If the imiage quality indicator can not be in the field of view at all times then it shall be used at the beginning and end of each shift as well as at a rate of once every eight billets. Should any of the sinulated defects not be apparent during any of the verificatio
18、n checks, all the billets since the last acceptable test shall be rejected.“ PAGE 20 4.5.4: Delete in its entirety and substitute the following: “4.5.4 Proving ground tests. The 50 grain assemblies manufactured during first article shall be inspected per Table 1 and then shipped to a specified gover
19、nment loading facility. The grains shall be loaded into M549 projectiles (Inert warhead/Live motor body) and tested at a government test facility in accordance with 4.5.4.1. Forward grains to be loaded (with the test samples must be in accordance with MIL-P-63202 and may themselves be first article
20、samples. 4.5.4.1 Ballistic tests. The 50 projectiles from 4.5.4 shall be tested in accordance with the M549 Projectile Loading, Assembling and Packing specification (MIL-P-50578). 10 rounds shall be fired at -65OF, 10 rounds at +145OF (M203 charge only) 30 rounds at +7OoF. Failure of the propelling
21、grains to perform according to the criteria of MIL-P-50578 shall be cause for rejection of the first article sample. All test data and raw magnetic radar tapes shall be sent to Commander, US Army Armament, Munitions and Chemical Command, ATTN: AMSMC-QAR-Q (D) , Picatinny Arsenal, NJ 07806-5000.“ 4 P
22、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-63203 (AR) AMENDMENT 2 4.5.5: Add the following: “4.5.5.1 Physical properties - &ternate test method. Each specimen and specimen support shall conform to the requirements of Figure 1. The specimen
23、shall be conditioned at the required temperature plus or minus 50F for three hours, minimum. The specimen shall be removed from the conditioning box and inserted between the fixture posts with steel cylinders the same diameter as the specimen placed above and below the specimen forming one continuou
24、s concentric cylinder. The specimen shall be tested using a cross head speed of 2 inches per minute. The total time elapsed from removing. the specimen from the conditioning box to the completion of each test shall be 1 -t 1/2 minute. All compression tests shall be conducted in a room that is mainta
25、ined at 75OF + 5F.11 - PAGE 22 * 5.3 Delete “Class B“ wherever it appears and substitute “Class A“. The margins of this amendment are marked with an asterisk or vertical line to indicate where changes (additions, mod if ications, correct ions, deletions) from the previous amendment were made. This w
26、as done as a convenience only and the Government 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-A997) 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
