1、- MIL-P-bO432C 23 7777706 0338q23 2 H &2+35- MIL-P-60432C (AR1 1 DECEMBER 1980 SUPERSEDING MIL-P-604 3 2B (PA) 28 October 1974 MILITARY SPEC11 ICATION PROPELLANT POWDER FOR USE IN BASE GRAIN, AHH This specification is approved for use by the US Army Armament Research and Development Command, and is
2、available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 This specification contains requirements not covered by the drawings and provides quality assurance provisions for the fabrication and packing of the propellant for use in the base grain, AHH. 2. APPLICABLE
3、DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids, or request for proposals, form a part of this specification to the extent specified herein. SPECIFICATIONS MILITARY MIL-G-155 MIL-(2-206 MIL-N-244 MIL-N-246 MIL-N-3399 MIL-L- 13 7 88 MIL-C-13609 MIL-A-48078
4、MIL-L- 176 99 Graphite (For Use in Ammunition) Cellulose, Cotton Linters Nitrocellulose (For Use in Explos i ves ) Nitroglycerin 2-Nitrodiphenylamine Lead Salicylate Casting Solvent for OGK, 010 and AHH Ammunition, Standard Quality Assur- ance Provisions, General Specifica- tion For Lead 2-Ethyl Hex
5、oate I i % 1 THIS DOCUMENT CONTAINS 13 PAGES. 1376 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-6032C 13 7779706 0338424 4 W MIL-P-60432C (AR) STANDARDS MILITARY MIL-STD-129 - Marking for Shipment and Storage MIL-STD-286 - Propellants, Solid
6、s Sampling, Examination and Testing 2.2 Other Publications. The following document forms a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids, or request for proposals, shall apply. CODE OF FEDERAL REGULATIONS Tit
7、le 49, Department of Transportation: Parts 0-199 3. REQUIREMENTS 3.1 Materials. The material shall comply with the requirement of the applicable specification as follows: MATERIAL Nitrocellulose SPECIFICATIONS MIL-N-244, Grade A, Type I Made with Cellulose, Cotton Linters Of MIL-C-206 Nitroglycerin
8、MIL-N-246, Type I 2-Ndtrodiphenylamine MIL-N-3399 Graphite MIL-G-155, Grade III or IV Lead Salicylate MIL-L-13 788 Lead 2-Ethylhexoate MIL-L-17699 3.2 Composition. The composition shall conform to the requirements of Table I when tested as specified in 4.5.1. TABLE I MATERIAL REQUIREMENTS PERCENT Ni
9、 troce llulose Nitroglycerine 11.4 Nominal 83.0 - + 1.3 _e- - Y. 2 n Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-b0432C L3fi7770b 0338425 b MIL-P-60432C (AR) TABLE I (Contd) MATERIAL Lead Salicylate REQUIREMENTS PERCENT 2.3 Nominal Lead 2-E
10、thylhexoate 2.3 Nominal 2-Nitrodiphenylamine 1.0 - + 0.15 Graphite (Glaze) 0.03 to 0.06 - 3.3 Total Volatiles. The total volatiles shall not be greater than 1.50 percent when determined as specified in 4.5.3. 3.4 - 120 Heat Test. fading of the methyl violet paper to salmon pink color in less than 40
11、 minutes and shall not explode in 5 hours when tested as specified in 4.5.4. The powder shall not cause complete 3.5 Residual Solvent. The residual solvent shall not be greater than 0.70 when determined as specified in 4.5.5. 3.6 Packinq Density. The packing density of the powder shall be 0.95 min.
12、when determined as specified in 4.5.6. 3.7 Grain Dimensions. Unless otherwise specified in the contract or purchase order, the grain dimensions when determined a% specified in 4.5.7-shall be as follows: Length: 0.035 - + 0.003 inches Diameter: 0.035 - + 0.002 inches The ends of the grains shall be s
13、ubstantially square and free of chips and tails. . 3.8 Heat of Explosion and Strand Burning Rate on Cast . Charges prepared in accordance with paragraph 4.5.2.1 3.8.1 Heat of Explosion. The heat of explosion shall be between 940 and 970 cal/sm when determined as specified in .- 4.5.2.3. 3.8.2 Strand
14、 Burning Rate 3.8.2.1 Burning Rate. The propellant shall meet burning rate specified in Table II when determined as in 4.5.2.4. the specified 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE II ij! MIL-P-60432C 13 E 7779706 0338426 E MIL-P-604
15、32C (AR) Pressure Pounds per Square Inch - , Burning Rate - Inches per second Lower Limit Upper Limit Minus 400F - Plus 1400F - 600 800 0359 . 414 . 421 -464 1000 . 433 -450 1200 .368 .462 1400 0479 1600 . 581 1800 .615 2000 .663 3.9 Workmanship. The best commercial practices shall be used in formul
16、ation of propellant furnished under this Specification, and all other applicable documents. The propellant and its standard ingredients shall be protected from the action of direct sunlight and acid fumes. No reground propellant or nitrocellulose shall be used in the manufacture of propellant procur
17、ed under this specification unless otherwise specified. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection and Standard Quality Assurance Provisions. Unless otherwise specified herein or the contract, the provisions of MIL-A-48078 shall apply and - hereby made a part-of this detail sp
18、ecification. 4.2 Classification of Inspections. The following type of inspection shall be conducted on this item: a. Quality Conformance Inspection 4.3 Quality Conformance Inspection 4.3.1 Inspection Lot Formation. See MIL-A-48078. 4 I in are Provided by IHSNot for ResaleNo reproduction or networkin
19、g permitted without license from IHS-,-,-4.4 Examination and Tests. See MIL-A-48078. 4.4.1 Chemical Composition and Other Tests of Propellant. (3.2 through 3.7). 4.4.1.1 Samplinq. Two one pound samples shall be selected at random from the lot of propellant. The samples shall be checked for the requi
20、rements specified in paragraph 3.2 through 3.7. 4.4.1.2 Rejection. If either sample fails to meet the requirements specified in paragraph 3.2 through 3.7, the lot of propellant shall be rejected. 4. powder paragr 4.2 Heat of Explosion on Cast Charges. The propellant aph 4.5.2.1. A sample shall be se
21、lected from each cast shall be cast into three cast charges in accordance with charge. The heat of explosion shall be determined on each sample selected from the three cast charges. each of the cast charges fails to meet the requirements of 3.8.1, six additional cast charges shall be cast in accorda
22、nce with paragraph 4.5.2.1. If any one of the additional cast charge samples fails to meet the requirement of 3.8.1, the lot of propellant powder shall be rejected. 4.4.2.1 Rejection. If one of the samples selected from 4,4.3 Strand Burninq Rate 4.4.3.1 Cast Charqes. Thirty-six (36) strands shall be
23、 made in accordance with paragraph 4.5.2.4 from each of the three cast charges prepared per paragraph 4.5.2.1. Three strands shall be used to determine the average burning rate at each temperature pressure combination specified in paragraph 4.5.2.4. 4.4.3.2 Rejection. If any one of the average stran
24、d burning rates rails to meet the requirement of 3.8.2.1, six additional charges shall be cast in accordance with paragraph 4.5.2.1. Thirty-six (36) strands shall be made from each of these cast charges. Three strands shall be used to determine the average burning rate at each temperature pressure c
25、ombination specified in paragraph 4.5.2.4. If any one of the average burning rates from each cast charge fails to meet the requirement of 3.8.2.1, the lot of propellant shall be rejected. 4.5 Test Methods and Procedures 4.5.1 Composition 5 Provided by IHSNot for ResaleNo reproduction or networking p
26、ermitted without license from IHS-,-,-MIL-P-60432C (AR) MIL-P-b0432C 13 a 7777706 0338Li2 1 a 4.5.1.1 Nitrocellulose, Major Defect. The nitrocellulose content shall be determined in accordance with Standard MIL-STD-286, Method 209.6 or 209.2. 4.5.1.2 Graphite, Major Defect. The graphite content shal
27、l be determined in accordance with Standard MIL-STD-286, Method 308.1 or 309.1. 4.5.1.3 2-Nitrodiphenylamine, Major Defect. The 2-nitro- diphenylamine content shall be determined in accordance with MIL-STD-286, Method 218.4. - 4.5.1.4 Nitroglycerin. The nitroglycerin content shall be determined in a
28、ccordance with MIL-STD-286, Method 208.2 and the results recorded for information only. 4.5.1.5 Lead Salicylate. The lead salicylate shall be determined in accordance with MIL-STD-286, Method 225.1 and the results recorded for information only. 4.5.1.6 Lead 2-Ethyl Hexoate. The lead 2-ethyl hexoate
29、content shall be determined in accordance with MIL-STD-286, Method 311.5 and the results recorded for information only. Charqe 4.5.2 Heat of Explosion and Strand Burninq Rate from Cast 4.5.2.1 Cast Charqe 4.5.2.1.1 The cast charge shall be made to a minimum of three (3) inches in diameter. Actual si
30、ze shall depend upon the availability of adequate casting molds. Both inhibited and non-inhibited cast charges are acceptable. However, in either case, the outer 1/4 inch peripheral layer of the cast charge shall not be utilized to obtain the required samples. 4.5.2.1.2 The A“ casting solvent compos
31、ition shall comply with MIL-C-13609 . 4.5.2.1.3 The A“ Base grain powder composition shall comply with 3.2. 4.5.2.2 Procedure for preparing the cast charge 4.5.2.2.1 The AHH casting solvent and the AHH base grain powder shall be evacuated at 1Omm Hg maximum for 8 hours minimum. 6 Provided by IHSNot
32、for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-P-60432C 13 7373706 0338427 3 MIL-P-6043 2C (AR) 4.5.2.2.2 The powder shall be screened into the casting mold. A screening plate shall be placed 4 1/2 inches above the top of casting mold. This screening plate shall
33、have 7/64 inch diameter holes on 5/32“ centers. A distributor plate shall be placed 4 1/2 inches above the screening plate. Sufficient holes shall be drilled into the distributor plate so that the base grain powder will be evenly dispersed upon the screening plate when the base grain powder falls fr
34、om the distributor plate on to the screening plate. The holes in the distributor plate shall be no less than .15 inch in diameter and the ratio between the end area of the cast charges to the total area of the distributor holes shall be 22/1. The powder shall be free to fall from the distributor pla
35、te, through the screening plate and into the casting mold without any obstructions. 4.5.2.2.3 The AHH casting solvent shall be flowed up through the packed casting mold. (Not applicable if using a top cast process) . 4.5.2.2.4 The finished casfing shall be cured for a suitable length of time to obta
36、in a complete cure at 145OF. 4.5.2.3 Heat of Explosion, Major Defect. The heat of explosion shall be determined in accordance with Method 802.1 of MIL-STD-286 . 4.5.2.4 Strand Burning Rate, Major Defect. The strand burning rate shall be determined in accordance with Method 803.1 of MIL-STD-286. Thre
37、e (3) strands shall be tested from each cast charge under each pressure and temperature listed below: Pressure (psi) at -4OOF 600 800 1000 1200 Pressure (psi) at 1400F 600 80 O 1000 1200 1400 1600 1800 2000 4.5.3 Total Volatiles, Major Defect. The total volatiles shall be determined in accordance wi
38、th Method 103.3 of MIL-STD-286 . 7 O Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-60432C 13 S 7999906 0338430 T MIL-P-60432C (AR) 4.5.4 - 12OoC Heat Test, Major Defect. The 12OoC heat test shall be performed in accordance with Method 404.1 o
39、f MIL-STD-286 . 4.5.5 Residual Solvent, Major Defect. The residual solvent content shall be determined in accordance with Method 103-4 or 103.5 of MIL-STD-286, except the moisture content shall be determined in accodance with Method 101.3 or with Method 102.1 when using Method 103.4. 4.5.6 Packing D
40、ensity, Major Defect 4.5.6.1 Apparatus. Th- following pieces of apparatus shall be required: One 500 ml cylinder, three pieces of numbered sectional tubing, a hopper, distribution plate, screen loading plate, and a brass bar. All of these parts shall be made of normalized brass. Other equipment shal
41、l include a brass spillage pan, a 9 inci diameter brass base plate with leveling screws, a small spirit level, a spouted container which will hold approximately 550 grams of powder, and a weighing scale accurate to n.1 gram. The brass spillage pan shall be of sufficient size to serve as a container
42、for the apparatus and a device for plumbing the assembled apparatus. The cylindrical sections shdl be machined to fit one above the other and the screen and distribution plate machined so they can be inserted between these sections. The plates shall contain holes that are leveled on both sides so th
43、at either side will allow powder to flow freely when inserted between the tubes . 4.5.6.2 Assembly. The apparatus shall be assembled as follows (see Figures 1 and 2): The circular base plate shall be placed in the spillage pan. This plate contains a circular area of the same outside diameter as the
44、bottom of the 500 ml cylinder. The 500 ml cylinder shall be seated in the circular area. The small holed loading screen shall be placed on top of tube number 3, the sectional tube number 2 shall be placed on top of-number 3, and this uiiit set on top of the 500 ml cylinder. The brass distribution pl
45、ate shall be placed on tube section number 2 and then tube number 1 shall be added. After the numbered tubes and plates are mounted correctly, the funnel- shaped hopper shall be placed into tube number 1. The spillage pan shall be grounded to a cold water pipe with a grounding cable, the spirit leve
46、l placed on the base plate, and the leveling screws adjusted unLi1 the plate is level and solid. 8 O Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-60Y32C 13 7777706 0338Y31 1 MIL-P-60432C (AR) 4.5.6.3 Conditioninq. The sample of casting powde
47、r shall be conditioned to a constant temperature of 80OF. The casting powder does not have to be conditioned for humidity provided the moisture content of the sample is between 0.1 and 3.0 percent and the test is made in a room having a relative humidity between 30 and 80 percent. 4.5.6.4 Procedure.
48、 The empty 500 ml cylinder shall be tared, the weight recorded, and the apparatus assembled as specified in 4.5.6.2. The spouted container shall be tared and approximately 545 grams of powder weighed out. The powder shall be dumped into the hopper in one motion, When all the powder has run through t
49、he column, all parts of the apparatus above the 500 ml cylinder shall be removed. This shall be accomplished by holding the bottom cylinder firmly and lifting off the other sections as a unit. Excess powder shall be struck off by using the brass bar with the 1/4 inch edge held flush with the top of the cylinder and with a slow constant movement across the cylinder top toward the operator. The bar shall not b
