1、Q i MIL-R-LOL5E FO = 9961990b 0503235 O INCH-POUND MIL-R-l0185E(MR) 13 January 1992 SUPERSEDING MIL-R-l0185D(MR) 19 August 1986 MILITARY SPECIFICATION RINGS, BREECH, STEEL FORGINGS FOR This specification is approved for use by the Department of the Army, and is available for use by all Departments a
2、nd Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification supports the acquisition of medium-high to high tensile strength alloy steel forgings for breech rings. This specification includes the minimum essential Engineering and Packaging Requirements and the necessary Quality
3、Assurance Provisions to determine that these requirements have been met. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherw
4、ise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in Lhe solicitation (see 6.2). SPECIFICATIONS MILITARY MIL-L-3150 - Lubricating Oil, Preservative, Medium MIL-C-13931 -
5、 Cannon, General Specification For (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) Beneficial comments (recommendations, addit
6、ions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Director, U.S. Army Laboratory Command, Materials Technology Laboratory, ATTN: SLCMT-MEE, Watertown, MA 02172-0001 by using the Standardization Document Improvement Proposal (DD Form 1426)
7、appearing at the end of this document or by letter. AMSC NO. A6706 AREA FORG DISTRIBUTION STATEMENT A Approved for public release: distribution unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-LOLBSE FO W 9999906 050L2Lb 2 MI L-R-1 O1
8、 85E ( MH ) 2.1.2 Other Government docurnents, drawinys, and publications. Tile following other Government docurnents, arawings, ana publications form a part of this document to tlie ext.ent specified herein. Unless otherwise specified, the issues are those cited in the solicitation, UHAWINGS (see 6
9、.10) US Army Armament Research Development and Engineering Ceiiter (ARDECI B8769067 - Magnetic Particie Inspection of Cannon and Mount Lomponents (Copies of drawings, ana other Government documents required by contractors in connection with specific acquisition functions should be obtainea froin the
10、 contracting activity or as directed by the procuring contracting otficer.) 2.2 Aon-Government publications. The following documents forin a part ot this specification to the extent specified herein. Unless otherwise specified, the issues of the docuriienrx which are DoD auopted are those listed in
11、the issue of the DODISS cited-in the solicitation. Unless otherwise specified, the issues of documents not listed in the DOUISS are the issues of the documents cited in the solicitation (see 6.2). AMEKICAN SOC I ETY FOR IESIING AND MATEHI ALS ASTM 1 ASYW A751 - Chemical Analysis or Steel Products, b
12、taridard Methods ASTrl D3951 - Commercial Packaging, Practice or ASTM E8 - Tension Testing of Metallic Materials ASTM E10 - Method of lest for Brinell kldruness of tiletallic Materials ASTM E23 - Notched Bar Impact Testing of Metallic Materials ASTM E340 - Macroetchiny Metals and Alloys, Standard r4
13、ethoci For ASTM E381 - gating Macruetched Steel, Standard Method For Practices, and Definitions for (Application for copies should be addresse to the American Society For Testing anci Materials , 1916 Race Screet, Philadelphia, Pennsylvania 19103.1 (Non-Government standards and other publications dr
14、e normally available from the organizations that prepare or distribute the documents. lhese documents also may be available in or through libraries or other informational services.) 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein,
15、 the text of chis document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specitic exemption has been obtained. 3 REQUIREMENTS 3.1 General requirementsr Forgings shall be in accordance with the applicable drawings, this specification, MIL-C-1
16、3931, and all referenceu documents. Any conflicts are to be resolved by means of tlie order of precedence (see 2.3) . 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*- a a e MIL-R-1OL5E FO 999990b 0501217 4 3.2 First article. The contractor shall
17、submit a first article unless it is specifically waived in the contract (see 4.3 and 6.2). No first article requirements shall be waived without review and approval by the procuring contracting officer (see 6.5). 3.2.1 New first article. A new first article shall be submitted when the contractor cha
18、nges the tooling, reforging stock chemistry or method of manufacture, forging procedure or heat treat procedure. 3.3 Test metal. Integrally-forged test metal (see 6.6.5) and forgings, as required, shall be provided for acceptance tests. The test specimens shall be taken at the location shown on the
19、applicable drawing. All integrally- forged metal whether or not Used for mechanical property tests, shall be removed from all forgings by the contractor before shipment of the forgings. 3.4 Chemical composition and heat treatment. Unless a particular composition of steel is Specified on the applicab
20、le drawing, in the invitation for bids, contract, or purchase order, (see 6.2) the contrdctor shall select a steel composition which when heat treated shall meet the mechanical properties specified on the applicable drawing or contract. The contractor shall subnlt his proposed chemistry and the prop
21、osed heat treatment process with the bid for forgings. At time of delivery, the contractor shall furnish a certified chemical analysis for each heat of steel used in producing the forgings. The analysis should include percentages of carbon, manganese, silicon, phosphorus, sulfur, aluminum, titanium,
22、 and alloying elements. Note: The type lubricants and cleaning process prior to heat treatment is also required with the bid for forgings (see 3.12). 3.5 Orientation of breech ring. When the flowline direction is specified on a drawing, the specified direction shall be predominant. 3.6 Internal soun
23、dness. The internal soundness of the forgings shall De equal to or better than macroetch standards C4, S3, and K3 of Plate 1. Photomacrographs of the macroetch stanards shall be as specified in ASTM E381. 3.7 Surface soundness. Unless otherwise specified on the applicable drawing, the forging shall
24、comply with the magnetic particle inspection requirements of drawing B8769067, Class IV. 3.8 Mechanical properties. 3.8.1 First article forgings. The mechanical properties of the first article forgings shall be determined by machining test specimens from the test coupon (6.6.4) and the test metal (6
25、.6.5) as shown on the applicable drawing. 3.8.1.1 Yield strength. The yield strength (0.1% offset) of each test specimen shall meet the requirements of the applicable drawing. 3.8.1.2 Reduction of area. The reduction of area for each individual specimen shall be greater than or equal to the minimum
26、reduction of area specified in table I for the corresponding yield strength. 3.11.1.3 Impact resistance. The Charpy V-notch impact resistance at -40F 2 2OF for each individual specimen shall be greater than or equal to 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without li
27、cense from IHS-,-,- MIL-R-LOLACE FO m 9999906 05CIL2L8 b the minimum Charpy V-notch impact resistance specified in table I for the corresponding average yield strength (0.1% offset). 3.8.1.4 Value difference. For each mechanical property attribute, yield strength (0.1% offset), reduction of area and
28、 Charpy V-notch impact resistance, a value difference (6.6.6) shall be calculated. This value difference shall be used to determine acceptability of production forgings for mechanical property requirements. 3.8.2 Production forginqs. The mechanical properties of production forgings shall be determin
29、ed by machining test specimens from the test metai. The mechanical property test results from those test specimens shall be adjusted using the value difference determined by the first article to calculate adjusted yield strength (0.1% offset), adjusted reduction of areal and adjusted Charpy V-notch
30、impact resistance. 3.8.2.1 Adjusted yield strength. The adjusted yield strength (0.1% offset) of each test specimen shall meet the requirements of the applicable drawing . 3.8.2.2 Adjusted reduction of area. The adjusted reduction of area for each individual test specimen shall be equal to or greate
31、r than the minimum reduction of area specified in table I for the Corresponding adjusted yield strengt h. 3.8.2.3 Adjusted impact resistance. The adjusted Charpy V-notch impact resistance for each test specimen shall be equa to or greater than the minimum Charpy V-notch impact resistance in table I
32、for the corresponding average adjusted yield strength. 3.8.3 Hardness. In a sampled lot accepted for mechanical propertiesl each forging not selected for the sample shall have a hardness within 25 Brinell hardness numbers 02 ehe average hardness value of the forgings selected for the sample, TABLE I
33、. Mechanical pro3erties. Charpy V-notch impact mia strength Reduction of area resistance at -40F 0 2OF, (0.1% offsec) range % minwle value ft-lbsp mi$imum_single value Transv. Long o Tr ansv. Long a psi - t - % ft-lbs o ft-lbs 90000 - 99,999 40 50 40 60 ioa,ooo - 109,999 40 50 35 50 111),000 - l19,O
34、QO 40 50 35 50 12010Q0 - 129,000 40 50 35 45 130,000 - 139,999 35 45 30 40 140p000 - 149,999 30 40 25 35 150,000 - 159,999 30 40 20 30 160,000 - 169,999 25 35 15 25 J.90,OOO - 180rOO0 25 35 15 20 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MI
35、L-R-3035E FO 9999906 0503239 I 3.9 Weld repair of forgings. Each forging not meeting the requirements of 3.7 inay be repairer1 by welding only upon receipt by the contractor of O written approval by the procuring contracting officer. Requests for repair welding must be submitted by the contractor in
36、 writing to the procuring contacting officer. The request must include a dimensioned sketch illustrating the size and location of the weld repairs to be attempted, the filler material to be used, the weld procedure to be practiced, and the inspection procedure and criterion. Final heat treatment sha
37、ll be after weld repairing has been completed. 3.10 Dimensions and surface roughness. Dimensions, surface roughness, and dimensional tolerances shall be specified on the applicable drawing. 3.11 Draft angle. The draft angle shall be seven degrees maximum. Dimensions on drawings do not include the dr
38、aft angle. Any matching draft angle shall be acceptable. 3.12 Identification marking. Each breech ring shall be marked as specified on the applicable drawing and in accordance with MIL-C-13931. Markings on breech rings shall include the contractors identification number and heat number or heat code.
39、 When a heat code is used, a cross-reference to the heat number shall appear on the test report and packing slips. 3.13 Cleaning. The type lubricants and cleaning process prior to heat treatment shall be identified with the bid for forgings. 3.13.1 Cleaning with a silicon based lubricant. When a sil
40、icon based lubricant is used in the forging process, these forgings shall be cleaned prior to heat treatment by abrasive blasting or shot blasting. a- 3.14 Records. 3.14.1 Properties. The contractor shall maintain records of the chernical and mechanical properties of the forgings (see 6.3). 3.14.2 P
41、rocedures. The contractor shall maintain detailed forging - heat treatment procedures subject to review by a Government representative. The contractor shall notify the procuring contracting officer of any changes to these procedures. 3.15 Workmanship. The forging shall not contain defects which, due
42、 to their nature, degree, or extent, prevent the fulfillment of the requirements of this specification. The existence of defects which cannot be removed by machining the forging to its finished dimensions shall cause the forging to be rejected even if all other requirements of this specification are
43、 met. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the c
44、ontract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-R-LOLB5E FO 999990b 0501220
45、LI = isapproved by the Governmerit. The Government reserves the right to perform any of the inspections set Eorth in this specificdtion vJhere such inspections are deemed necessary to ensure supplies aiiu services conform to prescribed requirements. 4.1.1 Responsibility for compliance. A11 itens sha
46、ll meet all requirements of sections 3 and 5. The inspection set forth in this specification shall hecone a part of the contractors overall inspectiori system or quality prograin. The absence of any inspection requirements in the specification slial not relieve the contractor ot the responsibility o
47、f ensuring t!iat all products or supplies subinitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is dn acceptable practice to ascertain conformance to requirements, however, this does not authorize subraissi
48、on of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.2 Ciassif ication of inspections. The inspection requirements specified herein are classif led as follows: a. First article inspection (see 4.3,. b, Quality conformance inspe
49、ction (see 4.4). 4.3 First article inspection. A first article stiail be submitted tor inspection in accordance with contract requirements. The iirst article shal be representative of the manufacturing processes to be used during quantity production. The first article shall he subjected to the examinations and tests of 4.3 and 4.4 to determine compliance with all the requirements of the applicable drawings, this specification, and the contracL. Prociuction bree
