1、MIL-P-707b2 13 9999906 Oi139253 4 + Benclidal oomments (mmmcndations, additions, dclctions) aod any pcrhent data whicb may bc of w in impmtiog this documcot should bc addrmod lo: Commaodct, US. Anny Amrarncnt, Munitions, and (nemical Command, Attn. AMSMCQA, Picafinny ha!, New lency 0786-5ooO dog tbe
2、 sd-addd Siandardizatisn Document 1mprcn.emcot Propmal (DD Form 1426) apring al the aid of this dacumcnt or by tetter. 1 INCH-POUND MIL-P-70762 (AR) .12 April 1990 MILITARY SPECIFICATION PROPELLANT, COMPOSITE, CAST, FOR USE IN SIMULATOR, MISSILE: Sagger XM27 . This specification is approved for use
3、within the US Army Armament, Munitions and Chemical Command, and is available for use by all Departments and Agencies of the Department of Defense . 1. SCOPE 1.1 This specification covers requirements and quality assurance provisions for the manufacture and acceptance of composite cast propellant (s
4、ee 6.1). 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards and I_- handbooks. The following specification, standards, and handbooks form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be tho
5、se listed in the issue of.the Department of Defense Index of Specifications and Standards (DODISS) and Supplement thereto, cited in the solicitation. SPECIFICATIONS MILITARY MIL-A-1 92 - Ammonium Perchlorate, Technical MI L-D-69 9 8 - Dichloromethane, Technical DOD-D-2 344 3 - Di-(2-Ethylhexyl) Adip
6、ate, Technical MIL-A-48078 - Ammunition, Standard Quality Assurance Provisions, General Specifications For Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-707b2 13 W 779790b 0437254 b MI L-F-82 65 5 MI L-A-85 4 95 STANDARDS MILITARY MIL-STD-105
7、 MIL-STD-2 86 MIL-STD-1168 MIL-STD-1171 DOD-STD-2101 MI L-S T 0-4 5.6 62 MIL-P-70762 (AR) - Ferric Oxide, Technical - Antioxidant, T-Butylphenol Type 2, 2- Methylenebis - Sampling Procedures and Tables for - Propellants, Solid : Sampling, - Lot Numbering of Ammunition - Acceptance and Description Sh
8、eets (For Propellants and Explosives) - Classification of Characteristics - Calibration System Requirements Inspection by Attributes Examination and Testing (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from-the Military Specificat
9、ions and Standards, Bldg. 4D, 700 Robbins Ave., Philadelphia, PA 19111-5094.) 2.1.2 Other government documents, drawings, and publications. The following other government documents, drawings, and publications form a part of this specification to the extent specified herein. Unless otherwise specifie
10、d the issues shall be those in effect on the date of the solicitation. SPECIFICATIONS NAVAL SEA SYSTEMS COMMAND WS 20700 - Poiybutadiene, Liquict, Hydroxyl Terminated DRAW I NGS US ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER 12576572 - Simulator, Missile: Sagger XM27 1291 0159 - Dicyclohexylmethan
11、e 4, 4- diisocyanate 1291 O1 60 - Cure Catalyst; Triphenyl Bismuth (Copies of specifications, standards, other government documents, drawings and publications required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by
12、contracting officer .) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70762 13 777990b OLI37255 MIL-P-70762, (AR) 2.2 Non-Government publications. - The following documents form a part of this specification to the extent specified herein. Un
13、less otherwise specified, the issues of the documents which are DOD adopted shall be those listed in the issue of the DoDISS specified in the solicitation, Unless otherwise specified, the issues of the documents not listed in the DoDISS shall be the issues of the nongovernment documents which is cur
14、rent on the date of the solicitation. CHEMICAL PROPULSION INFORMATION AGENCY CPIA, Pub1,ication No. 21 - The Solid Propellant Mechanical Behavior: Method for De term in i ng Un i ax i al Tensile Test at Constant Strain Rates (Application for copies should be addressed to: Chemical Propulsion Informa
15、tion Agency, Applied Physics Laboratory, John Hopkins University, John Hopkins Road, Laurel, MD 20810). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM B 330 Average Particle Size of Refractory Metals and Compounds by Fisher Subsieve ASTM D 792 Specific Gravity and Density of Plastics by Disp
16、lacement (Applications for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103). 2.3 Order of precedence. In the event of a conflict between the text of this specification and the reference cited herein, the text of this specificatio
17、n shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless specific exemption has been obtained. 3. REQUIREMENTS 3.1 Ingredients. All ingredients used in the manufacture of the propellant shall comply with the applicable specifications or,
18、 drawings as follows: Conforming to Specifications or Constituent Materials - Drawings - Hydroxyl terminated polybutadiene, WS 20700 (HTPB), Type II 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70762 (AR) Conforming to Specifications or Co
19、nstituent Materials Drawings 2, 2-Methylenebis-(4-methyl-6-tertiary- MIL-A-85495 butylphenol), (DMMBP) (H12MDI) Dicyclohexyl methane 4, 4-diisocyanate, 1291 O1 59 Di-(2-ethylhexyl) adipate, (DOA), DOD -Do2 3 4 4 3 Triphenyl bismuth 1291 O 1 60 Ferric oxide (Red), (Fe203 .H20) MIL-F-82655 Ammonium pe
20、rchlorate, (AP), Grade C, bimodal blend MIL-A-1 92 3.2 Mixer composition requirements. 3.2.1 Mixer composition. The composition of the propellant being added t,o the mixer shall meet the requirements of Table I. - Table I. Cogosition of materials being added to the mixer Requirement Compo si t i on
21、Material (I by weight) Test Method HTPB and DMMBP mix H 12MDI see 4.5.1 see 4.5.2 4.503 4.5.3 DOA . 2.992 to 3.008 4.5.3 Tr iphenyl bismuth 0.029 to 0.031 4.523 Ferric. oxide 1.995 to 2.005 4.5.3 Ammonium perchlorate (AP) 72.635 to 73365 4.5.3 3.2.2 - AP particle - size. The AP used in the manufactu
22、re of this propellant shall meet the.particle size requirements given in Table II. AP ratio may be varied within the limits of Table II to o-btain the requirements of 3.3.3. e 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-707b2 13 7977406 0
23、439257 L 9 MIL-P-70762 (AR) Table II. AP particle size blend ratio AP Blend ratio requirement Applicable Particle Diameter I_ (% by weight) Test Method MIL-A-192, Grade C Ground to an average diameter of 6 - + 2 microns 61.37 - 75.00 4.5.4 MILIA-192, Grade C Class 4, 200 microns nominal size 25.00 3
24、8.63 4.5.4 3.3 Chemical, mechanical, and ballistic properties. The cured propellant samples used to determine the density, mechanical properties, strand burning rate, heat of explosion, and stability shall be stored at 77 + 10 degrees F and 30 - 60% relative humidity in a condition where moisture ab
25、sorption is minimized. Excursions from these conditions for periods up to 8 hours for handling, transportation and machining are permissible. The propellant samples used for this testing shall not exceed a stored life of 4 weeks between the end of cure and the start of analysis. 3.3.1 Density. The d
26、ensity of the cured propellant shall be 1.55 + 0.03 g/cm 3 at 77 - + 3 degrees F when determined in accordance with 4.5.5. 3.3.2 - Mechanical properties. The mechanical properties of the cured propellant shall be as follows when determined in accordance with 4.5.6. a. Tensile Strength: 100 pounds pe
27、r square inch (psi) minimum b. Elongation: Not less than 8 percent at maximum- tensile load 3.3.3 Strand burning rate. The burning rate (rb ), in inches per second, shall fall within the band specified bythe following equation when determined in accordance with 4.5.7. rb = AP inches/second where A =
28、 0.030 2 0.006 (inches/second) (psia) P = average actual pressure (psia) 1 -0.4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-707b2 13 W 779790b 0439258 3 I MIL-P-70762 (AR) 3.3.4 Heat of explosion The heat of explosion of the cured propellan
29、t shall be 890 2 50 calories per gram (cal/g) when I determined in accordance with 4.5.8. and 4.5.8.1. 3.3.5 Stability. A vaccuum stability test shall be done in accordance with 4.5.9 for informational purposes only. I 3.4 Process controls. The contractor shall submit a Process Control Document to t
30、he Government specifying the process variables which are considered ckitical for the production- of the propellant for this specification. The Process Control Document. shall be submitted in accordance with 4.3.4. 3.5 Description sheets. The contractor shall prepare a sample description sheet and sa
31、mple propellant acceptance sheet, modifying the format given in MIL-STD-1171, to contain the information needed to show that the manufactured propellant has met the requirements of this specification. The contractor shall submit the sample propellant description sheet and sample propellant acceptanc
32、e1 sheet to the government technical agency (see 6.4) for approval before using these sheets. A copy of the propellant description sheet and propellant acceptance sheet for each manufacture lot of propellant shall be provided to the technical agency (see 6.4). C C 3.6 Workmanship. The manufacturer s
33、hall use procedure and ontrols which assure that the propellant is free from any ontamination or foreign material that would render the propellant unsuitable for the propellants-intended use (see 6.1). 4, QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in t
34、he contract or purchase order, the contractor is responsible.for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection
35、requirements specified herein, unless disapproved by the Government. The Goverment reserves the-right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements, Unless otherwise spec
36、ified herein, or in the contract, the provisions of MIL-A-48078 shall apply and are hereby made a part of this detail specification. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-707b2 13 777770b 0437257 5 MIL-I-70762 (AH) 4,l. 1 Responsibi
37、lity for compliance. All items must meet all requirements of sections 3 and 5. The inspections set torth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the co
38、ntractor of the responsibility of assuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling in quality conformance does not authorized submission of known defective material, either indic?ted or actual, nor does it commit
39、 the tioverment to acceptance of detective material. 4.2 Classification - ot inspections. Inspection requirements specified herein are classified as follows: a. First Article inspection (see 4.,3). b. Quality conformance inspection (see 4.4). 4.3 First article inspection. 4.3.1 Submission, lhe contr
40、actor shall submit a first article sample as designated by the Contracting Utficer for evaluation in accordance with the provisions of 4.3.2. The first article sample shall consist of five (5) blocks of propellant which have been vaccuum cast and cured in accordance with note two (2) ot drawing 125l
41、b572. Each block shall be large enough for all first article tests of section 4.3.2, but shall not be larger than /O0 cubic inches. One of the tive samples shall be cast trom the tirst mixer load and one from the last mixer load of the propellant lot. The three remaining samples shall be randomly ta
42、ken from the propellant mix if the lot contains more than one mixer load. If the lot is one mixer load, then one sample shall be taken from the top, one from the bottom, and three from the middle. lhese samples shall be obtained from the tirst production lot which has been produced by the contractor
43、 using the same production process, procedures and equipment as will be used in fulfilling the contract. All material shall be obtained from the same sources of supply as will be used in regular production. 4.3.2 Inspection testing. Each first article sample shall be tested tor density, mechanical p
44、roperties, strand burning rate, heat of explosion and stability in accordance with section three and tour of this specification. Failure of any sample to meet any of the requirements stated in section three (3) of this specification, shall be cause tor first article rejection. Provided by IHSNot for
45、 ResaleNo reproduction or networking permitted without license from IHS-,-,-I-_pl- MIL-P-70762 13 7779706 0437260 I 4.3.3 Kejection. See MlL-A-48Uy8. 4*3.4 Process control. A Process Control Document shall be submitted to the Technical Agency (see b.4). The document shall contain a description of th
46、e process, all materials used, process conditions/procedures, production/inspection equipment used, and all test methods used to ensure product quality. In addition, whenever there is a change (change in source of* materials, process conditioning procedures, etc.) from previously reported process co
47、ntrol data, the Technical Agency shall be notified of the new process control data and the reason for the change. 4.4 Quality conformance inspection. 4.4.1 Inspection lot formation. Inspection lots shall comply with the lot tormation provisions ot MIL-A-48018. A lot shall consist of one or more batc
48、hes of propellant produced by one manufacturer, in accordance with the same specification, or same specification revision, under one continous set of operation conditions. Each lot shall consist of that quantity of propellant that has been subjected to the same unit chemical or physical process inte
49、nded to make the final product homogeneous. lhe lot shall comply with. the provisions for submission of product as specified in MIL-STD-105. The criteria and procedure tor the assignment of lot number shall be in accordance with MIL- SlD-1 I b8. 4.4.2 Examination. Unless otherwise specified in the Classification of Defects and test tables, sampling plans and . procedures ror major and minor dete
