1、I INCH-POUND I MIL-W-48855C (AR) AMENDMENT 5 29 June 1995 SUPERSEDING AMENDMENT 4 28 FEBRUARY 1989 MILITARY SPECIFICATION WARHEAD BODY ASSEMBLY FOR WARHEAD SECTION, GM, HE, M258 This amendment forms a part of Military Specification MIL-W-48855C (AR), dated 17 May 1985, and is approved for use by the
2、 US Army Armament, Research, Development and Engineering Center, and is available for use by all Departments and Agencies of the Department of Defense. PAGE 2 2.1.1, STANDARDS: Add the following: II FEDERAL FED. TEST METHOD STD. No. 151 -Metals; Test Methods“ 2.1.2, Drawings: Add the following: “929
3、7072 -Preform, Powder Metal I PAGE 3 3.4, Add the following: “Isolation with warhead case and P3-9/P3-2 shorted 1 meg ohm“. 3.5: Delete in its entirety and substitute the following: “3.5 Process control document. The contractor shall supply a process control document which is to include descriptions
4、 of all production processes, procedures and equipment (including in-process inspection equipment) used to manufacture and inspect the production material. These descriptions shall identify the basic fabrication process, fabrication equipment (including methods for evaluating status of equipment), c
5、ontrols associated fabrication processes and in-process 1 of 8 FSC 1336 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-48855C (AR) AMENDMENT 5 inspections. All i
6、nitial and revised process control documents shall be submitted to the technical office for review and approval of completeness prior to its use in production (see 6.4). It should be noted that it is not the governments intention to approve the contractors process itself, but merely to review the co
7、mpleteness and adequacy of the process control document. I The contractor shall make available, at the time of government inspection, all data necessary to show compliance to the process control document (i.e. Temperatures, Pressures, Times, Speeds, Weights, etc. ) . I 3.7, line 5: Add the following
8、 after cracks, I, porosity“. * 3.7, Add the following to the end of paragraph: “Any J1 connector (part number 9282706) that exhibits a crack with physical separation of the shell material, without the aid of any magnification, will not be acceptable.“ PAGE 7 4.4.1, Sentence 4: Delete in its entirety
9、 and substitute: “Additionally, preform lot size shall be limited to the quantity sintered in a single oven at one time, and for a batch process, shall be limited to a single batch.I 4.4.2, b.: Delete column labeled DENSITY* and substitute: “DENSITY* 10% of lot/ minimum 10% of lot 10% of lot 10% of
10、lot“ PAGE 8 4.4.2, c: Delete column labeled DENSITY* and substitute: “DENSITY* 5% of lot/ minimum 5% of lot“ 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-48855C (AR) AMENDMENT 5 PAGE 10 4.4.2.2: Add new major categories in the appropriate
11、columns as follows: “Category Exam AQL or Req. Para Ref. Maior Q.Lk% 100% Para. Insn. Meth. 109 Presence of threads 100% 3.1 Gage in connector center pin. * 110 Torque test of 0.40% 3.1 Gage electrical plug connector. II PAGE 11 4.4.2.4: Add new categories in the appropriate columns as follows: “Cat
12、egory Exam AQL or Req. Para Ref. / Maior or Test 100% Para, InsD. Met.h, 105 Chemical analysis (PMP) L/ 3.1 4.5.10“ 4.4.2.4: Add new note as follows: “L/ A chemical analysis shall be performed on each lot.11 PAGE 13 4.4.2.5, Major 106: Delete “FWD and AFT threads“ and substitute II AFT threads and A
13、FT face“. 4.4.2.5, Major 111: Delete “FWD and AFT threads“ and substitute “AFT threads and AFT face“. 4.4.2.5, Major 112: Delete “FWD and AFT threads“ and substitute “AFT threads and AFT face“. PAGE 15 4.4.2.5, Major 137: Delete I- and substitute + 4.4.2.5, Major 141: Delete “.O10 and substitute “.0
14、02“. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-48855C (Al?) AMENDMENT 5 PAGE 16 4.4.2.5, Minor 208: Delete I+“ and substitute I+. PAGE 19 4.5.1.2: Delete in its entirety and substitute the following: “4.5.1.2 powder metal meform The tes
15、t specimens for a warhead lot that are to be machined from powder metal preforms shall be obtained from one of the following methods. a. All specimens from the first method are obtained from the sidewall of the powder metal preform. The test specimens shall be produced to such dimensions so that yie
16、ld and impact test bars shall be machined to the form and dimensions shown in figures 4 and 5. Two test specimens of each type shall be machined from each body. b. The yield specimens shall be obtained from the sidewall while the impact specimens shall be obtained from the base of the powder metal p
17、reform. The test specimens shall be produced of such dimensions so that the yield and impact test bars shall be machined to the form and dimensions shown in figures 4 and 5. Two test specimens of each type shall be machined from each body. II 4.5.2: Delete in its entirety and substitute the followin
18、g: “4.5.2 JrnDact resistance of warhead bodv, 4.5.2.1 uged Warhead bodv. Charpy v-notch impact test shall be conducted in accordance with AS“ E23. The temperature of the test specimen at the time of the fracture shall be -40 +2*F. The error in the Charpy machine shall not exceed +1 ft-lb, when the m
19、achine is tested using comparison specimens prepared by US Army Materials Research Agency (see 6.6). This comparison shall have been made within one year prior the time of inspection testing. 4.5.2.2 Powder metal Drefa The temperature of the test specimen at the time of the fracture shall be -40 +2O
20、F. The error in the Charpy machine shall not exceed +1 ft-lb, when the machine is tested using comparison specimens prepared by US Army Materials Research Agency (see 6.6). This comparison shall have been made within one year prior to the time of the inspection testing.“ 4 Provided by IHSNot for Res
21、aleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-48855C (51 O 9999706 2002537 727 O MIL-W-48855C (AR) AMENDMENT 5 4.5.3.2, Sentence 1: Delete in its entirety and substitute: “Tension tests shall be accomplished in accordance with ASTM E8, except that the configuration sh
22、all be as per figure 5, and the rate of strain will be 0.003 to 0.007 inch per minute through the yield strength and then to be increased so as to produce failure in approximately one additional minute.“ 4.5.8: Add the following: “The HTS circuit isolation shall be tested at 200 VDC with a pressure
23、of 10 PSI applied to the HTS shield.“ 4.5.10: Add new paragraph 4.5.10 as follows: “4.5.10 Chemical analvsis (Powder metal onlv) . A chemical analysis shall be performed on each lot of preforms produced and should identify all elements shown to be crucial by the drawing. The chemical analysis shall
24、be performed in accordance with Method 111 or Method 112 of FED-STD-151, or another method approved by the procuring activity.“ PAGE 21 Delete “Fiaure 1. Location of test sDecimens in warhead bodv“ and substitute “Fiaure 1. Location of test sDecimens in foraed warhead bodv“ . PAGE 23 Add new Page 23
25、A. Add new Page 23B. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-48855C (5) W 99999Ob 2002538 Bb3 m o IH-I .* . MIL-W-48855C (AR) AMENDMENT 5 F-/ ALL DIMENSIONS IN INCHES DIMENSIONS I -D 4 A- DIAMETER AT CENTER B- WIDTH OF GRIP ENDS APPRO
26、X.3 C- LENGTH OF REDUCED SECTION MIN. D- GRIP LENGTH, APPROX F- FILLET RADIUS, MIN. G- GAGE LENGTH H- DEPTH OF GRIP ENDS APPROX. L- TOTAL LENGTH, APPROX. 2fl AREA OF CROSS SECTION, SQUARE INCHES APPROX. 0.157 L 0.001 0.250 1.00 1.250 O .250 0.750 L 0.005 0.250 4.00 0.5 I 1. Diameter of the reduced s
27、ection may be smaller at the center than at ends. Difference shall not exceed one percent of the diameter at the center. 2. When extensometer is required to determine elastic properties, dimensions C and L may be modified to provide therefor. In all cases the percentage of elongation shall be based
28、on dimension G. 3. Ends may be of any shape to fit the holder of the testing machine such that the preform is tested axially. 4. A generous fillet is desirable. FIGURE 4. Powder Metal Preform Tensile SDecimen 6 (23A) Provided by IHSNot for ResaleNo reproduction or networking permitted without licens
29、e from IHS-,-,- MIL-W-48855C (5) m 9999906 2002539 7TT S MIL-W-48855C (AR) AMENDMENT 5 DIMENSION TOLERANCE INCHES TOLERANCE MILLIMETER +m- + INCHES - A- LENGTH 55.000 0,001 0.061 0.154 0.025 0.025 3.912 C- DEPTH 0.001 0.001 0.154 0.025 0.025 3.912 B- WIDTH 0.0 0.100 2.165 0.0 2.50 F T R im 7 (23B) P
30、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-48855C (AR) AMENDMENT 5 PAGE 24 6.3, Line 2 : Delete “,Dover, NJ 07801. I and substitute the following “(D), Picatinny Arsenal, NJ 07806-5000“. This address will be specified on the Contract Data R
31、equirement List, DD Form 1423 in the contract. Unless otherwise specified, data item DI-R-1714 will apply.“ 6.4: Delete in its entirety and substitute the following: “6.4 Process control document. The process control document shall be submitted in accordance with the process control document require
32、ments of data item description DI-R-5297A (Tailored), to Commander, U. S. Army Research, Development and Engineering Center, ATTN: AMSTA-AR-QAA-R(D), Picatinny Arsenal, NJ 07806-5000 prior to the start of production. Questions, if any, regarding proprietary issues of the process control documentatio
33、n may be directed to the command legal office ATTN: AMSMC-GC at the above address.“ 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 conve
34、nience 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 1336-0007) 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
