1、NOTE The document identifier and heading has been changed on MIL-PRF-82736A(OS)this page to reflect that this is a performance specification. There 16 November 1988are no other changes to this document. Tbe docament identifier on SUPERSEDINGsubsequent pages has not been changed, but will .bechanged
2、the DOD-I-82736(OS)next time this document is revised. 27 MARCH 1985PERFORMANCE SPECIFICATIONIGNITION PELLETS, MAGNESIUM-FLUOROCARBONThis specification is approved for use by tbe Naval Sea SysterrrsCommand (OS),Department of the Navy, turdis available for use by all Departments and Agencies of theDe
3、partment of Defense.1. SCOPE1.1 Scope. This specification describes ignition pellets consisting of magnesium powder dispersed in amixture of solid fluorormrbnnpolymers,2. APPLICABLE DOCUMENTS2.1 Government documents,2.1.1 Specifications, standards, and handbooks. The following specifications, standa
4、rds, and haadbooksform a part of this document to the extent specified herein. Unles; ohenvisespe;nent ofDocuments, Government Printing Office, Washington, DC2.2 Non-Government publications. The following documents forma Part of this document to the extent specified herein. Unlessotherwise specified
5、, the issues of the documents which are DoDadopted are.those listed in the issue of the DODISS cited in thesolicitation. Unless otherwise specified, the issues of documentsnot listed in the DODISS are the issues of the documents citedin the solicitation (see 6.2).2Provided by IHSNot for ResaleNo rep
6、roduction or networking permitted without license from IHS-,-,-MIL-I-82736A (OS)a American Society for Testing and MaterialsD 792 Method of Test for Specificand Density of PlasticsGravityD 1457 Standard Specification for PTFE(Polytetrafluoro-ethylene) Molding and Extrusion MaterialD 1513 Carbon Blac
7、k, Pelleted - Pour Density(Application for copies should be addressed to the American Society forTesting and Materials, 1916 Race Street, Philadelphia, PA 19013.)(Non-Government standards and other publications are normallyavailable from the organizations that prepare or distribute thedocuments. The
8、se documents also may be available in or throughlibraries or other informational services.)2.3 Order of precedence. In the event of a conflict betweenthe text of this document and the references cited herein, the textof this document takes precedence. Nothing in this document,however, supersedes aDD
9、liCable laws and regulations unless aspecific exemption3. REQUIREMENTSa71 3.1 First article.subjected to firstwith 4.4.ha;”been obtained. _When specified (see 6.2), a sample shall bearticle inspection (see 6.4), in accordance3.2 Material requirements. When analyzed in accordance withparagraph 4.5.1,
10、 the ignition powder shall be composed of theingredients in the proportions shown in Table 1, each of whichmeets the requirements of the application publication listed therein.TABLE I. Material CompositionApplicable Percent by weightIngredient document Min. Max.Magnesium Powder (Mg), MIL-M-382 52.5
11、54.5Type II, Granulation 16Plastic Molding Material, D 1457-83(PTFE) Type IV 29.5 32.0Copolymer, Vinylidene WS 7682 15.0 16.5Difluoride and Hexa-0 fluoropropylene3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-82736A (OS)3.3 Dimensions. When m
12、easured in accordance with paragraph4.5.2, the ignition pellets (extruded ignition powder) shallcomply with the dimensional requirements of Figure 1.FIGURE 1. Dimensional RequirementsI J0.150” - 0.228”0.38cm - 0.58cm l.- 1* “0.090 - 0.098”0.23cm - 0.25cm3.4 Performance and product characteristics.3.
13、4.1 Heat of explosion. When tested in accordance withparagraph 4.5.3, the heat of explosion shall be 1400 caloriesper gram (cal/g) to 1500 cal/g.3.4.2 Density. When tested in accordance with paragraph4.5.4, the density shall be 178 grams per cubic centimeter(g/cm3) to 1.94 g/cm3.3.4.3 Burning rate.
14、When tested in accordance with paragraph4.5.5, the strand burning rate shall be:Pressure Burning Rate(psig) (inches per second).-.- -500 0.361 to 0.5611,000 0.894 to 1.0943.4.4 Loading density. When tested in accordance with paragraph4.5.6, the loading density shall be 0.92 g/cm3 1.04 g/cm3.3.5 Lot
15、numbers. The assignment of lot numbers shall be inaccordance with MIL-sTD-1168.3.6 Workmanship. When inspected in accordance with paragraph4.5.1, the ignition pellets shall be free of dirt, grease andforeign matter.4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for inspection. Unless otherwise sp
16、ecifiedin the contract or purchase order, the contractor is responsible.for the performance of all inspection requirements (examinations a714Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-82736A(OS)e and tests) as specified herein. Except as o
17、therwise specifiedin the contract or purchase order, the contractor may use his ownor any other facilities suitable for the performance of theinspection requirements specified herein, unless disapproved bythe Government. The Government reserves the right to performany of the inspections set forth in
18、 this specification where suchinspections are deemed necessary to ensure supplies and servicesconform to prescribed requirements.4.1.1 Responsibility for compliance. All items shall meet allrequirements of sections 3 and 5. The inspection set forth inthis specification shall become a part of the con
19、tractorsoverall inspection system or quality program. The absence of anyinspection requirements in the specification shall not relievethe contractor of the responsibility of ensuring that allproducts or supplies submitted to the Government for acceptancecomply with all requirements of the contract.
20、Sampling inspection,as part of manufacturing operations, is an acceptable practice toascertain conformance to requirements, however, this does notauthorize submission of known defective material, either indicatedor actual, nor does it commit the Government to accept defective material.4.2 Classifica
21、tion of inspections. The inspection requirementsspecified herein are classified as follows:o a. First article inspection (see 4.4).b. Quality conformance inspection (see 4.5).4.3 Lot. The ignition powder shall come from a single 200-lbsmaximum mix. Each ignition pellet ingredient shall come from asi
22、ngle ingredient lot.4.4 First article inspection.4.4.1 Sample. The contractor shall submit a first article sampleas designated by the contracting officer (see 6.4) for evaluation inaccordance with provisions of paragraph 4.4.2. The first articlelot size shall be same as production lot size. The samp
23、le shallbe obtained from the first production lot which has been producedby the contractor using the same production processes, proceduresand equipment as will be used in fulfilling the contract. Thesample shall consist of: 100g of ignition powder, one kilogram(kg) of ignition pellets, six 12-inch s
24、trands and twenty four6-inch strands.4.4.2 Inspection to be performed. The sample will be subjectedby the Government to any or all of the examinations ortests specified herein.4.4.3 Acceptance or rejection.a71 When the inspections of 4.4.2show that the first article sample meets all the requirements
25、 of3, the sample shall be accepted. Otherwise, the first article5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-82736AOS)sample shall be rejected. The Goverent reserves the right toterminate its inspection upon any failure of an assembly, comp
26、onent,or test specimen in the sample to comply with any of the statedrequirements.4.5 Quality conformance inspection. The material shall besubjected to all inspections and tests herein for acceptance.4.5.1 Chemical analysis. Determine the chemical composition ofignition powder as follows:4.5.1.1 Cop
27、olymer determination.a. Weigh a 1.0 0.3 g specimen of ignition powder to thenearest 0.1 milligram (mg) into a 250 - milliliter (mL) beak=.Perform test in triplicate. Add 100 mL of reagent grade acetoneto the beaker and cover with a watch 91ass. Dissolve thecopolymer at room temperature for aminimum
28、of 16 hours.b. Place a 3.7 - centimeter (cm) GF/C Whatman (or equivalent)glass fiber filter paper in a clean, dry 30 - mL medium porosityglass crucible. Weigh the crucible and paper. Place thecrucible in a vacuum filtration apparatus.c. Transfer the contents of the beaker to the crucible andfilter.
29、Wash the beaker quantitatively with acetone and filter.Rinse the crucible with more acetone.Dry crucible and residue in an oven at 100 I 5 Celsius(c) f%weigh.e.PercentWhere,30 kinutes to 60 minutes. Cool in a desiccaor andCalculation:Copolymer = (A - (C-B) / A) X 100A = weight of specimen, gB = weig
30、ht of crucible and paper, gC = weight of crucible, paper and residue, g.Report average value to the nearest 0.1 percent. The averagevalue shall meet the requirements of paragraph 3.2 or the lotshall be rejected (see 6.2).4.5.1.2 Magnesium determination.a. Place the crucible from paragraph 4.5.1.1, c
31、ontainingmagnesium (Mg) and PTFE, in a 250 - mL beaker. Slowly add 1:1 HC1to the crucible until the evolution of gas ceases. Add enough1:1 HC1 into the beaker to cover the top of the crucible and coverbeaker with a watch glass.60Provided by IHSNot for ResaleNo reproduction or networking permitted wi
32、thout license from IHS-,-,-MIL-I-82736A (OS)eb. Heat the beaker on a steam bath for 16 hours minimum.Allow the solution to cool to room temperature. Remove thecrucible with tongs and rinse the outside of crucible with 1:1HC1 into the beaker.c. Place the crucible into the filtration apparatus,transfe
33、r the solution into the crucible and filter. Wash thebeaker quantitatively with 1:1 HCL and filter. Repeat washingwith distilled water. Wash crucible with acetone.d. Dry crucible and residue in an oven at 100 + 5 C for 30minutes to 60 minutes. Cool in a desiccator and weih.e. Calculation:Percentage
34、Mg = (C D) / A X100Where, A = weight of specimen, gC = weight of crucible, paper and residue (Mg + PTFE)from paragraph 4.5.1.1, gD = weight of crucible, paper and residue (PTFE), g.Report average value to the nearestvalue shall meet the requirements ofshall be rejected (see 6.2).a71 4.5.2 Dimensions
35、. Each specimen ofmeasured with a micrometer. Each ofthe requirements of paragraph 3.3 or(see 6.2).0.1 percent. The averageparagraph 3.2 or the lota 50-pellet sample shall b.ethe 50 pellets shall meetthe lot shall be rejected4.5.3 Heat of explosion. Determine the heat of explosion ofignition powder
36、in accordance with MIL-STD-286B, Method 802.1,except argon gas and a 2.0 0.3 g specimen shall be used.Perform the test in triplicate and record each value. Reporteach value to the nearest whole cal/g. Each value shall meet therequirements of paragraph 3.4.1 or the lot shall be rejected (see6.2).4.5.
37、4 Density. Determine the density using a 12 1 inchignition strand in accordance with ASTM D792, except hexane shallbe used as the immersion solvent. Perform test in triplicate andrecord each value. Report each value to the nearest 0.01 g/cm3.Each value shall meet the requirements of paragraph 3.4.2
38、or thelot shall be rejected (see 6.2).4.5.5 Burning rate. The ignition material shall be subjected tothe strand burning test of MIL-sTD-286B, Method T803.1 except thefollowing:(a) Strand sample should be 6 inches to 7 inches long witho0.090 inches to 0.098 inches diameter. Test samples in a closedbo
39、mb filled with water conditioned to 24 5 C.7Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-82736A (OS)(b) Six samples should be tested at 500 pounds per squareinch gauge (psig) and six samples should be tested at 1000 psig. eRecord each burn r
40、ate value. Report the average value to thenearest 0.10 inches per second. The average value shall.meet therequirements of paragraph 3.4.3 or the “lotshall be rejected (see6.2).4.5.6 Loading density. Determine the loading density using 1.0 0.1 kg of ignition pellets in accordance with ASTM D1513,exce
41、pt calculate the density as weight per volume, g/cm3. Reportthe average of two determinations to the nearest 0.01 g/cm3. Theaverage value shall meet the requirements of paragraph 3.4.4 orthe lot shall be rejected (see 6.2).4.5.7 Examination.4.5.7.1 Visual. Visual examination shall be performed to as
42、surethat the ignition pellets meet the requirements of paragraph 3.6.4.5.7.2 Packaging, packing, and marking. Examination shall bemade to acertain that packaging, packing, and marking conform toSection 5 of this specification.5. PACRAGING5.1 Preservation. Preservation shall be commercial and shall b
43、ein accordance with 49 CFR part 173 in general and with 173.154 0specifically.5.2 Packing. The ignition pellets shall be packed in sealed bagsconforming to MIL-B-82647(OS). The weight of pellets in one bag shallbe 0.5 lb to 1.0 lb.5.3 Markinu. Containers shall be marked in accordance with 49 CFR 172
44、Subpart Dincluding(a)(b)(c)(d)(e)(f)(g)(h)a;d specifically 172.422 and in accordance with MIL-STD-129,the following:Number and date of this documentName and type number of productManufacturerDate of completionDate of shipmentof manufactureLot (batch) and control numbersContract or purchase order num
45、berQuantity: weight of ignition pellets in container.8Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-e 6. NOTES(This sectionexplanatory natureMIL-I-82736A (OS)contains information of a general orthat may be helpful, but is not mandatory.)6.1 Xntende
46、d use. The fluorocarbon ignition pellets covered bythis document are intended for use in ignition of solid propellantrocket motors and other pyrotechnic devices.6.2 Acquisition requirements. Acquisition documents mustspecify-the followig:a. Title, numberb. Unit of issueand date of the specificationc
47、. Applicable issue of DODISS (ace 2.1.1)d. Applicable issues of other Government documents,drawings and publications (see 2.1.2)e. Applicable issues of non-Government publications(see 2.2)f. Whether a first article sample is required (see 3.1, 4.40and 6.4)9. That the safety precaution requirements o
48、f the“Contractors Safety Manual for Ammunition, Explosives, andRelated Dangerous Material,” DoD 4145.26M are applicable. NOTE:When this specification is used as part of the description ofwork to be accomplished by a Government activity, the safetyprecaution requirements of “Ammunition and Explosives
49、 Ashore,”0P5 are applicable.6.3 Consideration of data requirements. The following datarequirements should be considered when this specification isapplied on a contract. The applicable Data Item Descriptions(DIDs) should be reviewed in conjunction with the specificacquisition to ensure that only essential data arerequested/provided and that the DIDs are tailored to reflect therequirement
