1、INCH-POUNDMIL-DTL-32100(OS)8 MAY 2002 SUPERSEDINGMIL-C-18757/5A (OS)24 January 1994 DETAIL SPECIFICATION CARTRIDGE CASE, STEEL, 76-MILLIMETER (62-CALIBER) This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, andis available for use by all Departments and A
2、gencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for the 76-millimeter, 62-caliber steel cartridgecase, herein referred to as the “cartridge case.“ 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections
3、3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended foradditional information or as examples. While every effort has been made to ensure the completeness ofthis list, document users are cautioned that they must meet all
4、specified requirements documents specifiedin Sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications and standards. The following specifications and standards form a part of thisdocument to the extent specified herein. Unless otherwise s
5、pecified, the issues of these documents arethose listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS)and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL A-A-1684 Tape, Pressure-Sensitive Adhesive (Plastic Film) Beneficial com
6、ments (recommendations, additions, deletions) and any pertinent data which may be of usein improving this document should be addressed to: Commander, Indian Head Division, Naval SurfaceWarfare Center, Engineering Standardization Branch (Code 4230), Indian Head, MD 20640-5035 by usingthe Standardizat
7、ion Document Improvement Proposal (DD Form 1426) appearing at the end of thisdocument or sending a letter.AMSC N/A FSC 1315 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
8、,-,-MIL-DTL-32100(OS) 2DOD OF DEFENSE MIL-DTL-117 Bags, Sleeves and TubingMIL-D-3464 Desiccants Activated, Bagged, Packaging Use and Static DehumidificationMIL-S-3289 Steel, Plate and Disk, Carbon, Forging Quality STANDARDS DOD OF DEFENSE MIL-STD-129 Marking for Shipment and StorageDOD-STD-2101 Clas
9、sification of Characteristics (Unless otherwise indicated, copies of federal and military specifications and standards are available from:Standardization Documents Order Desk , Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.)2.2.2 Other Government documents, drawings and publications. The
10、 following other Governmentdocuments, drawings, and publications form a part of this document to the extent specified herein. Unlessotherwise specified, the issues are those cited in the solicitation.DRAWINGS NAVAL SEA SYSTEMS COMMAND (CAGE Codes 10001 and 53711) 3028547 Case, Cartridge, 76mm/62 Cal
11、iber, Steel 3030497 Receiver, 76mm/62 Caliber Case Body Gage 5366338 Cartridge, 76mm/62 Caliber, Mk 201 Mod 1 (Application for copies of NAVSEA drawings should be addressed to: Commander, Naval SurfaceWarfare Center, Crane Division (Attn: Code 4021), Crane, IN 47522-5001.)PUBLICATIONS NAVAL SEA SYST
12、EMS COMMAND (CAGE Code 10001) OD 47471 Method for Rating the Effects of Salt Spray Testing on Zinc ElectroplatedCartridge Cases (Application for copies should be addressed to: Commander, Indian Head Division, Naval Surface WarfareCenter, Guns Branch (Code 4210K), Indian Head, MD 20640-5035.) Provide
13、d by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32100(OS) 32.3 Non-Government publications. The following documents form a part of this document to theextent specified herein. Unless otherwise specified, the issues of the documents which are DOD ado
14、ptedare those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issuesof documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2).AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM B 117 Operating Salt Spray
15、 (Fog) Apparatus, Standard Practice for (DoD adopted)ASTM B 499 Measurement of Coating Thicknesses by the Magnetic Method: NonmagneticCoatings on Magnetic Basis Metals, Standard Test Method for (DoD adopted)ASTM B 633 Standard Specification for Electrodeposited Coatings of Zinc on Iron and SteelASTM
16、 E 8 Tension Testing of Metallic Materials, Standard Test Methods for (DoDadopted)ASTM E 18 Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials,Standard Test Methods for (DoD adopted)ASTM D 5486 Standard Specification for Pressure-Sensitive Tape for Packaging, Box Closure,and S
17、ealing E1-2000(Application for copies should be addressed to the American Society for Testing and Materials, 100Barr Harbor Drive, West Conshohocken, PA 19428-2959.)AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)/AMERICAN SOCIETY FOR QUALITYCONTROL (ASQC) ANSI/ASQC Z1.4 Sampling Procedures and Tables f
18、or Inspection by Attributes (DoDadopted)(Application for copies should be addressed to the American Society for Testing and Materials, 1916 RaceStreet, Philadelphia, PA 19103-1187) (Non-Government standards and other publications are normally available from the organizations thatprepare or distribut
19、e the documents. These documents also may be available in or through libraries orother informational services.)2.4 Order of precedence. In the event of a conflict between the text of this document and thereferences cited herein, the text of this document takes precedence. Nothing in this document, h
20、owever,supersedes applicable laws and regulations unless a specific exemption has been obtained.3. REQUIREMENTS 3.1 First article sample. When specified (see 6.2), a sample shall be subjected to first articleinspection (see 6.3) in accordance with 4.3.Provided by IHSNot for ResaleNo reproduction or
21、networking permitted without license from IHS-,-,-MIL-DTL-32100(OS) 43.2 Characteristics. Unless otherwise specified in the contract or purchase order, the cartridge caseshall conform to the requirements specified herein and on drawing 3028547 (see 4.5.1).3.3 High stress expansion (M101). The cartri
22、dge case shall show no evidence of cracks in anyportion of the case when subjected to the high stress expansion test of 4.5.2.3.4 Hardness (M102). The cartridge cases shall conform to the hardness values specified in table I inthe regions shown in figure 1. Generally, heat treatment is necessary to
23、achieve the required values forhardness and elongation. No individual readings shall be outside the regional requirement (see 4.5.3).TABLE I. Hardness and tensile strength. Hardness1RegionMax MinYield Strengthat 2% offset, (psi)Elongation(1“ gage length)B C42 C32 135,000 Min 5% MinC C41 B96 90,000 M
24、in 6% MinDC30B94 EB85C 1Rockwell “C“ or “B“ scale STP1. 3.5 Tensile strength and elongation (M103). The yield strength and elongation values for thecartridge case shall be as specified in table I in the regions shown in figure 1 (see 4.5.4 and 4.5.5).3.6 Protective coating (M104). The case shall be
25、zinc plated in accordance with ASTM B 633, TypeII except that the exterior thickness of the protective coating shall be between 0.0003 inch and 0.0008 inchand the interior plating thickness shall be 0.00015 inch minimum. Thinner plating at the inert standoffcontact points is acceptable provided ther
26、e are no more than nine. The protective coating shall show nocorrosion of basis metal. The size and frequency of the black corrosion products of zinc shall not exceedthat of the established standard of 0.2400 (see 4.5.6). After testing, white corrosion products of zinc thatdo not interfere with cham
27、bering of the cartridge case are acceptable.3.7 Chamber gage (M105). Each cartridge case shall fully chamber in a Navy-approved chamber gage(see 4.5.7).3.8 Ballistics (M106). Each cartridge case shall load, eject, show no splits, and otherwise performsatisfactorily when ballistically tested (see 4.5
28、.8).3.8.1 Case extraction (M107). Cartridge cases tested under automatic and semiautomatic action shall beejected and shall in no way cause the weapon to cease firing. When fired in the single shot mode, thecartridge case shall be capable of being extracted by manual operation of the extraction syst
29、em. (NOTE:The term “ejected“ means that the cartridge case is thrown clear of the breech, permitting loading of thesubsequent round. The term “extract“ means that the cartridge case is loosened and pulled to the rear, bythe normal operation of the extraction system, sufficiently to permit ready remo
30、val.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32100(OS) 54545Hardness readings in Region B (all ofshaded area) to be taken 0.050 belowinterior surface, where applicable,otherwise on cross sectional area0.881.311.7275 RB Min0.0601.0460
31、90 RB MinDetail of Region75 RB Min4.01.512.0Location of centerlineof circumferentialtensile specimensRegion A16.00 Region C4.50 Min25.02 RefRegion D1.55 MinRegion E4.0 MaxRegion B, all ofshaded areaFIGURE 1: Tensile and hardness specimen locations. Dimensions are in Inches.Provided by IHSNot for Res
32、aleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32100(OS) 63.9 Item identification. Item identification marking of all cartridge cases shall be in accordance withthe contract or purchase order (see 6.2).3.10 Workmanship (M108). The cartridge case shall be produced in
33、such a manner as to ensurecompliance with all the requirements of this specification and the applicable associated specifications.There shall be no burrs, (cracks, tears) or other imperfections of manufacture, which in the opinion of theGovernment inspector, may adversely affect either the assembly,
34、 functioning, or handling of the product. (Flutes, draw marks, loopers, slug marks, and pits shall not exceed 10 percent of the calculated wallthickness in the affected area nor be of sufficient magnitude to cause minimum or maximum dimensions tobe exceeded. (NOTE: Grain orientation directionality i
35、s produced by rolling. A looper is a visible patternof this grain orientation extended by drawing.) There shall be no flutes, pitting, draw marks or loopers inthe region between the base and a circumferential line 3 inches from the base of the cartridge case.) Theonly acceptable surface defects on t
36、he interior base-to-wall radius are those exemplified by the sampleboard approved by the contracting activity (see 4.5.1).3.11 Wax Coating. The exterior side wall of the case shall be coated with a thin (0.0008 inch) film ofwax emulsion. The emulsion shall be a uniform, stable aqueous emulsion of wa
37、xes, resins and emulsifyingagents. Prior to application of the coating, the exterior surface shall be free of oils, greases, soaps, acids orother foreign matter. Slight sections void of wax are permissible.3.11.1 pH value. The pH value of the emulsion shall be between 8.0 and 9.0.3.11.2 Volatile mat
38、ter. The emulsion shall be free of volatile organic solvents. The solvent used shallbe water with no more than 1.0 percent by weight of perfume or perfume solvents.3.11.3 Total solids. The total solids shall be no less than 12 percent by weight.3.11.4 Wax and Resin Content. The wax and resin content
39、 shall be no less than 8 weight percent.3.11.5 Softening Point. The softening point of the wax shall no be less than 165oF.4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified asfollows: a. First article inspection (see 4.3) b. Quality confor
40、mance inspection (see 4.4) 4.2 Classification of characteristics. The characteristics verified by the tests and examinationsspecified herein and in the detail inspection are classified as critical, major or minor in accordance withDOD-STD-2101. Requirements for critical characteristics are identifie
41、d by the symbol (C), and majorcharacteristics by the symbol (M). The number following the classification symbol indicates the serialnumber of the characteristic. Requirements which are not annotated with a classification code areclassified as minor.4.3 First article inspection. The first article sam
42、ple shall consist of 158 cartridge cases and shall beexamined and tested in accordance with table II. The cartridge cases shall be the same as for regularProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32100(OS) 7production and manufactured u
43、nder the same conditions as the production lot. Further production ofcartridge cases by the contractor, prior to the approval of the first article, shall be at the contractors risk.4.3.1 First article sample acceptance/rejection. Acceptance or rejection of the first article sampleshall be in accorda
44、nce with table II. For those where the acceptance criteria is not shown, any failure tomeet the requirements shall be cause for rejection of the sample.4.4 Quality conformance inspection. Quality conformance inspection shall consist of all theexaminations and tests as specified in table II.TABLE II.
45、 First article sample and quality conformance inspection and sampling.Quality Conformance InspectionTest or ExaminationRequirementParagraphMethodParagraphFirst ArticleSample SizeTest Units perLotConsequencesof FailuresDimensional 3.2 4.5.1 158 58 Reject lotHigh stressexpansion3.3 4.5.2 158 100%Rejec
46、t defectiveunitsHardness 3.4 4.5.3 551Reject lotTensile strength andelongation3.54.5.4 and4.5.5551Reject lotProtective coatinga. Thicknessb. Corrosion3.6 4.5.6 33312Reject lotReject lot2Chamber gage 3.7 4.5.7 158 100%Reject defectiveunitsBallistic 3.834.5.8 150 50 Reject lotItem identification 3.9 4
47、.5.1 158 100%Reject defectiveunitsWorkmanship 3.10 4.5.1 158 100%Reject defectiveunitsPackaging andmarkingSection 5 4.6 158 100%Reject defectiveunits1Unless otherwise specified in the applicable associated specification.2Nonconformance of one sample to meet the corrosion code requirements shall requ
48、ire testing of 3 additional samples.Failure of any of the additional samples to meet the corrosion code requirement shall be cause for rejection of the lot.3Nonconformance of one sample to meet the case ejection requirement of 3.8.1 shall require testing of an additional 100samples. Failure of any o
49、f the additional samples to meet the ejection requirement shall be cause for rejection of the lot.4.4.1 Lot size. Unless otherwise specified in the contract or purchase order (see 6.2), the production lotshall consist of 5000 cartridge cases plus those required for test purposes.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32100(OS) 84.5 Methods of i
