1、a . ,. ICI I INCH-POUND MIL-P-70456C (AR) AMENDMENT 6 08 December 1993 SUPERSEDING AMENDMENT 5 6 July 1993 MILITARY SPECIFICATION PROPELLANT, STICK, M31AlE1 FOR USE IN CHARGE PROPELLING M203A1 This Amendment forms a part of Military Specification MIL-P-70456C (AR) dated 28 April 1989, and is approve
2、d for use by the US Army Armament Munitions and Chemical Command and is available for use by all Departments and Agencies of Department of Defense. PAGE 2 2.1.2 Add the following new drawing: “9345098 - Body, Molded“ PAGE 5 3.4.3 Delete the number I129l1 and substi-Ute with the number 1t28.511 where
3、ver it appears in the paragraph. 3.9.1.2 Delete in its entirety and substitute new paragraph 3.9.1.2: ll3.9.1.2 145 deqrees F Dressure. At standard weapon conditions and recommended charge weight, the average pressure at 145 degrees F shall not exceed 56,000 pounds per square inch (psi) (see 4.4.2.5
4、.1) .I1 PAGE 6 3.11 Delete in its entirety and substitute the following new paragraph: “3.11 Blendinq process control. A propellant lot shall be a minimum of 130,000 lbs. unless otherwise specified by the contracting officer. The contractor shall assure that each lot has been sufficiently blended to
5、 meet the ballistic uniformity requirements (see 3.9). The contractor shall submit a blending process control document to the government specifying the blending process control steps which are considered critical for meeting the ballistic uniformity requirements. The blending process control documen
6、t shall be submitted in accordance with 4.1.2.11 AMSC N/A i of a FSC 1376 DISTRIBUTON STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-7045bC (6) = 9999906 1970278 321 = MIL-P-
7、70456C (AR) AMENDMENT 6 PAGE 7 Add the following paragraphs: “4.1.3 Nonconforminq material. The contractors quality program plan (see 6.2) shall include an effective and positive system for controlling nonconforming material to include mixes, batches, or sublots of propellant that do not meet compos
8、itional requirement (see 3.2 and 4.1.3.1). The system shall include procedures for nonconforming material identification, segregation, and disposition. All nonconforming supplies shall be positively identified to prevent unauthorized use, shipment and intermingling with conforming supplies. 4.1.3.1
9、Manufacturinq process. The contractors manufacturing process shall be documented as part of the quality program plan (see 6.2). Under a batch manufacturing process, the contractor shall maintain an effective and positive system (weighing each ingredient) for controlling amounts of ingredients charge
10、d to each mixer to assure the material meets the compositional requirements (see 3.2). Under a continuous process where the batch system is not applicable, the contractor shall maintain an effective and positive system for controlling amounts of ingredients charged to each mixer to assure the materi
11、al meets the compositional requirements (see 3.2). For an unproven propellant manufacturing process which is significantly different from the present propellant manufacturing process, the contractor shall submit his proposed process control system for meeting compositional requirements in the form o
12、f a process control document to the contracting officer for approval by the technical agency. The contractor shall not initiate production without written approval of the process control document from the contracting officer. Once approved the contractor shall not change the process without approval
13、 from the contracting officer (see 6.13).“ PAGE 8 4.3.2.2 Delete in its entirety and substitute new paragraph 4.3.2.2: “4.3.2.2 Testinq to be performed. The following test program shall be used for the first article test. (The first article test is a qualification test for a new contractor or a majo
14、r process change. Once a contractor has demonstrated the ability to produce acceptable stick propellants the first article test may be waived by the Contracting Officer. The 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-7045bC (6) 9999906 L
15、970279 268 MIL-P-70456C (AR) AMENDMENT 6 following test program (see Table III) is the minimum test requirement for the first article test and shall be used when the stick propellant manufacturing process is not significantly different from the present propellant manufacturer. If the new contractors
16、 process or the proposed process change is found to be significantly different from the present manufacturing process, additional testing may be required to qualify the process difference.) TABLE III. FIRST ARTICLE TEST. Test Temp No. of No. of Phase (Deq F) Calibration Rds Test Rds TECOM TOP Propel
17、lant Checkout 70 145 -60 Sequential Environ- mental 145 15 -60 15 PAGE 11 10 TOP-4-2-504 10 TOP-4-2-504 10 TOP-4-2-504 60 60 TOP-4-2-504 TOP-4-2 -504“ 4.4.2.5 Delete in its entirety and substitute new paragraph 4.4.2.5: “4.4.2.5 Permissible individual maximum Pressure. If at any time during testing,
18、 an individual pressure greater than that specified in 3.9.1.1 is observed, testing shall cease and the lot shall be rejected. It PAGE 12 4.4.2.5.1 Delete in its entirety and substitute new paragraph 4.4.2.5.1: “4.4.2.5.1 Averaqe 145 deqrees F Pressure. If the average pressure at 145 degrees F excee
19、ds 56,000 pounds per square inch (psi), the lot shall be referred.“ 4.4.3 Delete the number it2911 and substitute with the number It28.5l1. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1L-P-7045bC (6) 9999906 I1970280 TBT M AMENDMENT 6 MIL-P-704
20、56C (AR) PAGE 13 4.5.1.3 Delete in its entirety and substitute new paragraph 4.5.1.3: Il4.5.1.3 Lenqth. Five hundred (500) sticks shall be randomly selected from each sublot and measured by gage for length. If one stick is found to be exceeding the maximum length requirement, the sublot shall be rej
21、ected. Sticks with a length shorter than the minimum requirement shall be classified by the degree of deviation from the minimum length. The basis for rejection of a sublot shall be: (1) Reject if more than 14 sticks are found shorter than 28-13/16 inches. (2) Reject if more than 7 sticks are found
22、shorter than 28-9/16 inches. (3) Reject if one or more sticks are found shorter than 28-1/2 inches. A 100% inspection on stick length shall be done on the rejected sublot. Each stick shall be measured by gage and any stick which does not meet the length requirement should be removed from the sublot.
23、 The final blending on the entire lot should not be initiated until all sublots are found to be meeting the stick length requirement. The gage design for propellant length measurement shall be submitted to the technical agency for approval.11 PAGE 14 4.5.1.4.1 Delete in its entirety and substitute n
24、ew paragraph 4.5.1.4.1: Il4.5.1.4.1 Carbon black. The actual percentage of carbon black shall be determined in accordance with Method 308.1 or 309.1, MIL-STD-286. I 4.5.1.5 Delete in its entirety and substitute new paragraph 4.5.1.5: ll4.5.1.5 Charqe weiqht loadabilitv. Five (5) 28.5 lb stick propel
25、lant samples shall be randomly withdrawn from the final blended lot. Each 28.5 lb stick propellant sample shall be weighed to 28.5 lb - 2.0 ounces. Each 28.5 lb stick propellant sample shall be bundled and tied as tight as possible with cords in four places (both ends and two places in the middle).
26、An additive liner shall be wrapped around the stick bundle and tied as tight as possible with three cords (both ends and one place in the middle). The stick bundle with the additive liner shall be loaded into an inert cartridge case with dimensions as specified in Drawing #9345098. If any stick bund
27、le with the additive liner cannot be loaded into the inert cartridge case without any difficulty, the propellant lot shall be rejected.11 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-7045bC (6) m 9999906 197028L 9Lb = MIL-P-70456C (AR) AME
28、NDMENT 6 4.5.3 Delete in its entirety and substitute the following new paragraph: “4.5.3 Proyina around assessments (6.5) These tests shall be conducted at a Government proving ground in accordance with the applicable Acceptance Test Procedure using M549, RA or PXR- 6325 projectiles inert loaded wit
29、hin 0.1 pound of an as fired weight of 96.0 pounds using primer, M82 and fired from M198 Howitzer with a M199 Cannon with 80 percent (minimum) remaining life. Firing shall be conducted with a spindle to charge base stand-off of 1 inch (plus or minus 1/4 inch). Copper crusher gages (2) shall be used
30、to measure the maximum chamber pressure of each charge. One rear piezo gage (1) shall be used to measure the maximum chamber pressure and ignition delay of the charge fired at 145 degrees F and to measure the maximum chamber pressure and ignition delay of the charge fired at -65 degrees F (No piezo
31、gage measurement is required for 70 degrees F firing). Velocity coils will be used to measure the muzzle velocity of each charge. Prior to firing, all charges shall be temperature conditioned in a large conditioning box with adequate air circulation at the required temperature for a minimum of 24 ho
32、urs and assurance will be made that, when fired, the charges are at the conditioning temperature. The following tolerances shall apply to all -65 deg F, 145 deg F and 70 deg F conditioning: -65 deg F from -65 deg F to -60 deg F; 145 deg F from 140 deg F to 145 deg F; 70 deg F from 67.5 deg F to 72.5
33、 deg F. Temperature indicator (thermometer) strips shall be placed on the side (combustible cartridge case) of all charges conditioned at 145 deg F as a further assurance of the proper conditioning temperature. If any indicator strip shows the charge has been exposed to a temperature greater than 14
34、5 deg F, that charge will not be fired. Propelling charges used for test as calibration shall be assembled in accordance with MIL-C-70462 (see 6.9) . I1 PAGE 15 4.5.3.1.1 Add the following to the end of the para 4.5.3.1.1: lThe manufacturer of the combustible cases used in the calibration components
35、 for the propellant acceptance test shall be specified in the Propellant Acceptance Sheet along with the recommended charge weight (see 6.9.3).“ 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-P-7045bC (b) = 999990b 1970282 852 9 MIL-P-704 5GC
36、 (AR) AMENDMENT 6 * 4.5.3.2 Delete in its entirety and substitute the following: “4.5.3.2 Uniformity. (see Table V) 4.5.3.2.1 Initial production. Thirty rounds shall be assembled with the calculated charge weight of propellant. Ten rounds each shall be conditioned to -65 deg F, 70 deg F and 145 deg
37、F (as indicated by special thermocoupled round). Test rounds fired at 70 deg F shall be fired alternately with calibration rounds and shall be corrected to standard weapon/firing conditions (i.e., the difference between calibration performance under test conditions and standard conditions). Firing r
38、esults at all temperatures shall be corrected to standard projectile weight (see 3.9.1) and to recommended charge weight conditions (i.e., the difference between as fired charge weight and recommended charge weight). The means and standard deviations of the velocities and pressures at all firing tem
39、peratures shall be calculated using corrected results. The initial production lots represent the first three consecutive lots from each manufacturer which have been produced and met the acceptance criteria of this specification. After three accepted propellant lots from the same manufacturer, the un
40、iformity acceptance test shall be fired in accordance with 4.5.3.2.2. 4.5.3.2.2 Subsequent production. Twenty rounds shall be assembled with the calculated charge weight of propellant (see 4.5.3.1) as determined for each lot for nine (9) consecutive lots. Ten rounds each shall be conditioned to 70 d
41、eg F and 145 deg F (as indicated by special thermocoupled round). Test rounds fired at 70 deg F shall be fired alternately with calibration rounds and shall be corrected to standard weapon/firing conditions (i.e., the difference between calibration performance under test conditions and standard cond
42、itions). Firing results at all temperatures shall be corrected to standard projectile weight (see 3.9.1) and to recommended charge weight conditions (i.e., the difference between as fired charge weight and recommended charge weight). The means and standard deviations of the velocities and pressures
43、at all firing temperatures shall be calculated using corrected results. For every tenth propellant lot, ten additional rounds shall be assembled with the calculated charge weight of the propellant lot and conditioned to -65 deg F (as indicated by special thermocoupled round). Firing results at - 65
44、deg F shall be corrected to standard projectile weight (see 3.9.1) and to recommended charge weight conditions (i.e., the difference between as fired charge weight and recommended charge weight). The mean and standard deviation of the velocities and pressures at -65 deg F shall be calculated using c
45、orrected results. Throughout production, if there is a major change in manufacturing process, testing shall revert back to the initial production plan (see 4.5.3.2.1). c 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-c i, MIL-P-7045bC (6) W 999990
46、6 1970283 799 = MIL-P-70456C (AR) AMENDMENT 6 PAGE 18 6.2 Delete in its entirety and substitute new paragraph 6.2: 116. 2 Orderinq data. 6.2.1 Contractors qualitv proqram. Contracts should identify MIL-Q-9858 as the applicable higher level contract quality control requirement and specify data item d
47、escription DI-R-5297A. 6.2.2 Data requirements. One copy of the Propellant Description Sheet and one copy of all ballistic test data for each lot of propellant shall be forwarded to ARDEC, Picatinny Arsenal, NJ 07806-5000, ATTN: SMCAR-QAR-R, and SMCAR-AEE-BP. Individual measurements of the total vol
48、atiles, stick weights, stick bundle weights and dimensions shall be recorded in the Propellant Description Sheet for proper evaluation of stick propellant.“ PAGE 19 J( 6.5 Add the following to TABLE V: O next to -65. I* Initial production only and every tenth propellant lot“ at the bottom of the tab
49、le. PAGE 20 Add the following new paragraph: “6.9.3 Recommended charqe weiqht. The recommended charge weight as specified in the Propellant Acceptance Sheet may need final weight adjustment if the manufacturer of the combustible case components used for the propelling charge loading, assembling and packing is different from the manufacturer of the combustible case components used for calibration components which are used for the propellant acceptance test. T
