1、 MILITARY SPECIFICATIONBAR, METAL AND BLANKS, STEEL (UNDER 2 INCHES IN DIAMETER) FOR BARRELS OF SMALL ARMS WEAPONS This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers alloys steel, bars and blanks under 2
2、inches in diameter for use in the manufacture of barrels for small arms weapons (see 6.1 and 6.3). 1.2 Classification. 1.2.1 Composition. Bars and blanks shall be furnished in the composltlons listed in table I, as specified (see 6.2). 1.2.2 Condition. Bars and blanks shall be furnished in the follo
3、wing conditions, as specified (see 6.2 and 6.3): Bars (mill length). Hot rolled, as rolled. Hot rolled and annealed (see 6.6). Quenched and tempered. Blanks and gun barrel bar lengths. As rolled or as forged. Cold formed blanks (spheroidize annealed before forming.)Quenched and tempered. AMSC N/A FS
4、C 9510 DISTRIBUTION STATEMENT A Approved for public release; dlstrlbutlon unllmlted. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document, should be addressed to: Commander, U.S. Army ARDEC, ATTN:AMSRD-AAR-AIC-S, Picatinny
5、Arsenal, NJ 07806-5000. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at www.dodssp.daps.mil. MIL-B-11595E(AR) w/AMENDMENT 1 26 July 2004 Superseding MIL-B-11595E(MR) 7 June 1988 INCH-POUND Provided by IHSNot fo
6、r ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-11595E(AR)2.APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Speclflcatlons, standards, and handbooks. The following specifications, standards,and handbooks form a part of this speclflcatlon to the extent speclfle
7、d herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Speciflcatlons and Standards (DODISS) and supplement thereto, cited in the sollcltatlon. FEDERAL STANDARDS FED-STD-48 - Tolerances for Steel and Iron Wrought P
8、roducts, and for Centrifugally Cast Steel. FED-STD-66 - Steel: Chermcal Composltlon and Hardenability. FED-STD-151 Metals: Test Methods. DEPARTMENT OF DEFENSE STANDARDSMIL-STD-163 - Steel Mill Products Preparation for Shipment and Storage (Copies of these documents are available online at http:/assi
9、st.daps.dla.mil/quicksearch/ or www.dodssp.daps.mil or from Standardization Documents Order Desk, 700 Robbins Avenue, Bldg. 4D, Philadelphia, PA 19111-5094.) 2.2 Other publlcations. The following document(s) form a part of this specification to the extent specified herein. Unless otherwise specified
10、, the issues of the documents which are DOD adopted shall be those listed of the issue of the DODISS specified in the solicitation. Unless otherwlse specified, the issues of documents not listed in the DODISS shall be the Issue of the non-Government documents which is current on the date of the soli
11、citation. ASTM ASTM A255 - End-Quench Test For Hardenablllty of Steel ASTM A751 - Chemical Analysis of Steel Products ASTM El0 - Brinell Hardness of Metallic Materials ASTM El8 - Rockwell Hardness and Rockwell Superficial Hardness of Metallic Material ASTM E23 - Notched Bar Impact Testing of Metalli
12、c Materials ASTM El40 - Standard Hardness Conversion Tables for Metals ASTM E381 - Macroetch Testing, Inspection,and Rating Steel Products, Comprising Bars, Billets, Blooms, and Forgings (Applications for copies should be addressed to ASTM, 1916 Race Street, Philadelphia, PA 19103.) 2 Provided by IH
13、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SOCIETY OF AUTOMOTIVE ENGINEERS AMS 2640 - Magnetic Particle Inspection. MIL-B-11595E(AR)(Application for copies should be addressed to the Society of Automotive Englneers, Inc., 485 Lexington Avenue, New York City,
14、New York 10017.) (Non-Government standards and other publications are normally available from the organizations which prepare or which distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of precedence. In the event of a
15、conflict between the text of this specification and the references cited herein (except for associated detail specifications, specification sheets or MS standards), the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regul
16、ations unless a specific exemption has been obtained. (Technical society and technical association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal gencies.) Element Carbon Manganese Phosphorus Sulfu
17、r Silicon Chromium Milybdenum Vanadium 1. chemical ranges and limits based on ladle analysis. 2. Maximum except where indicated as a range. 3. Steels containing elements not designated, in excess of the following amounts,shall be Subject to rejection:copper 0.35 percent and aluminum 0.040 percent. 3
18、.1.1 Ladle analysis. be furnished by the contractor A certified ladle analysis of each heat or melt of steel (see6.3) shall showing the percentages of the elements present. 3 3. REQUIREMENTS 3.1 Chemical composition.The chemical composition shall conform to the requirements shown in table I. TABLE I
19、. Chemical composition.1,2,3 Composition Percent 0.48 - 0.55 0.75 - 1.00 0.040 0.040 0.20 - 0.35 0.80 -1.10 0.15 - 0.25 Percent 0.47 - 0.55 0.70 - 1.00 0.040 0.05 - 0.09 0.20 - 0.35 0.80 - 1.15 0.15 - 0.25 Percent 0.41 - .49 0.60 - 0.90 0.040 0.040 0.20 - 0.35 0.80 - 1.15 0.30 - 0.40 0.20 - 0.30 ORD
20、 4150 ORD 4150 Resulfurized Chrome-Moly-Vanadium Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-11595E(AR)3.1.2 Check analysis The chemical composition, as determined by check analysis(see 4.4.2 and 4.6.2.1),shall meet the applicable requireme
21、nts specified in FED-STD-66 except that check analysis for sulfur shall be required for ORD 4150 Resulfurized steel with an allowance of 0.01 percent under or over specification limits. 3.2 Quenched and tempered condition (see 1.2.2). 3.2.1 Hardness, Bars and blanks specified ln the quenched and tem
22、pered condition shall have a Brinell hardness of 277 to 331 (or equivalent Rockwell hardness determined from conversion tables in ASTM E140) when tested as specified in 4.4.3 and 4.6.2.2. 3.2.2 Heat-treatment. Heat treatment shall consist of heating, quenching in circulating oil, and tempering to me
23、et specified hardness and physical properties (see 6.4). Alternately, individual bars may be induction heated, water quenched and induction tempered to meet specified hardness and physical properties (see 6.4). 6.4.1 not applicable when material is induction hardened. 3.2.3 Stress relief. Unless oth
24、erwise specified, material which has been cold straightened after heat-treatment shall be stress relieved at a temperature not lower than 150F below the final tempering temperature. 3.3 Impact resistance. 3.3.1 Quenched and tempered condition. When bars or blanks are furnished in the quenched and te
25、mpered condition, test specimens from samples taken asspecified in 4.4.4.1 shall have an average longitudinal impact value at a temperature of minus 40F of not leas than 40 foot-pounds when tested as specified in 4.6.1.1 and 4.6.2.3. No individual value shall be leas than 35 foot-pounds.When blanks
26、are produced by processes which involve an upset forging operation in the cartridge chamber area, each teat specimen taken from the chamber area shall have a longitudinal impact value at a temperature of minus 40F of not less than 15 foot-pounds. Specimens taken from the non-upset area (see 4.6.1.1.
27、3 (a) shall meet the 40 foot-pound average and the 35 foot-pound individual requirements specified above. 3.3.2 As rolled, as forged, cold formed, or annealed condition. When bars or blanks are furnished in any of the above conditions, test specimens from samples taken as apeclfied in 4.4.4.2 and he
28、at-treated as speclfxed in 4.6.1.1.2 to a Rockwell hardness of C30 to C35 (or the equivalent Brinellhardness as determlned using the applicable conversion table contained in ASTM E140) shall have an average longitudinal impact value at a temperature of minus 40F of not less than 40 foot-pounds when
29、tested as specified 1n 4.6.1.1 and 4.6.2.3. No individual value shall be less than 35 foot-pounds. When blanks are produced by processes which involve an upset forging operation in the cartridge chamber area, each test specimen taken from the chamber area shall have a logitudinal impact value at a t
30、emperature of minus 40F of not less than 15 foot-pounds. Specimens taken from the non-upset area (see 4.6.1.1.3 (a) shall meet the 40 foot-pound average and the 35 foot-pound individual requirements specified above. 3.4 Macrostructure. 3.4.1 ORD 4150 and chrome-moly-vanadium.The quality and cleanlin
31、ess of the steel as lndlcated by the results of the macroetch test specified In 4.4.5, 4.6.1.2, and 4.6.2.4 shall be equal to or better than macrographs S-2, 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-11595E(AR)R-2, and C-2 for the electr
32、ic furnace process and S-3, C-3 and R-3 for the open hearth process as shown in ASTM E381. 3.4.2 ORD 4150 resulfurized. The quality and cleanliness of the steel as Indicated by the results of the macroetch test specified in 4.4.5, 4.6.1.2 and 4.6.2.4 shall be equal or better than macrographs C3-S4 c
33、ontained In plate I of ASTM E381 and free of all defects shown in plate II of ASTM E381. 3.5 Nonmetallic inclusions. The steel shall have a maximum average rating of 0.45 for both frequency and severity when tested as speclfled in 4.4.6, 4.6.1.3 and 4.6.2.5. No individual test specimen shall have a
34、severity rating greater than 0.75. 3.6 Hardenabllity. The hardenability of the steel shall be not less than 552 (Rockwell C52) at 8/16 inch (one-half inch from the end of a standard Jominy or end-quench test specimen) when tested as specified In 4.4.7, 4.6.1.4 and 4.6.2.6. 3.7 Forging practice. When
35、 forging operations are performed, process controls shall be subject to Government approval. Heating for forming shall be conducted using methods and equipment,lncludlng pyrometric controls, suitable for the purpose. 3.8 Dimensions and tolerances. 3.8.1 Blanks and forged bars. Blanks and forged bars
36、 (see 6.3) shall conform to the dimensions and tolerances speclfled in the contract or order (see 6.2). 3.8.2 Hot rolled bars. Unless otherwise specified, hot rolled bars shall conform to the ordered dimensions and shall be within the tolerances shown in the following paragraphs of FED-STD-48 (see 6
37、.2). Dimension ParagraphDiameter Straightness 1b1 1b5 3.9 Marking. Each bar or blank shall be suitably marked to identify the heat or melt. The marking medium shall not react obJectionably with the surface of the steel during heat-treatment. When speclfied, indlvldual bars or blanks shall be identif
38、ied as required in the invitation for bids or order (see 6.2). 3.10 Workmanship. Bars and blanks shall be sound; uniform in quality and condition; and commercially free of indications of overheating or burning, cracks, twists, seams, damaged ends, and other related defects injurious to the finished
39、component (see 6.3). 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-11595E(AR)4. QUALITY ASSURANCE PROVISIONS 4.1 Responslbllity for inspection. Unless otherwise speclfled in the contract or purchase order, the contractor is responsible for
40、the performance of all inspection requirements as specified herein. Except as otherwlse specified in the contract or purchase order, the contractor may use his own or any other facilities sultable for the performance of the inspectlon requirements specified hereln, unless disapproved by the Governme
41、nt. The Government reserves the right to perform any of the inspectlons set forth in the speclfication where such inspections are deemed necessary to assure supplles and services conform to prescribed requirements. 4.2 Classlflcatlon of inspectlon. All examination and testing in this speclflcation i
42、s classified as quality conformance lnspectlon and shall be to determine conformance to the requirements of the specification to serve as a basis for acceptance of the material covered by this speclflcatlon. 4.3 Lot. A lot shall consist of all material submitted for lnspectlon at the same time, of t
43、he same heat or melt, same condltlon, same size, and when heat-treated, shall be from the same furnace charge of a batch type furnace or shall be of the same heat-treatment in a continuous furnace.Identlflcatlon of each heat or melt shall be maintalned throughout manufacture and lnspectlon. 4.4 Samp
44、ling. 4.4.1 For visual and dimensional examimatlon. Unless otherwlse speclfled in the contract or order, the contractor shall use his normal commercial sampling procedures. 4.4.2 For Government product analysis. When Government product analysis is performed, at least one sample shall be taken from e
45、ach heat or melt. Each sample shall be composed of approximately 2 ounces of drllllngs or millings taken from bars or blanks in accordance with ASTM A751. Samples shall be forwarded prepaid by the contractor to the designated testing agency (see 6.2). 4.4.3 For hardness testing. When bars or blanks
46、are furnished In the quenched and tempered condition, the contractor shall take at random 10 samples from each 100 bars or fraction thereof. One defective sample shall cause rejectIon of the represented material. 4.4.4 For impact resistance testing. 4.4.4.1 Quenched and tempered condition. Bars or b
47、lanks shall be taken from each heat or melt In accordance with the applicable schedule contained In table II. Sampling shall be performed in alphabetlcal sequence as speclfied in table II, and tests for each schedule must be satisfactorily completed prior to undertaklng the next schedule. Sampling w
48、ill revert to schedule A when any of the following occurs: (a) Failure of sample specimens to meet impact realstance requirements (see 3.3.1). (b) Modlflcatlon of the heat-treat process. (c) Utilizatlon of new heat-treat equipment. (d) Samples are taken from new heat or melt. (e) When continuous fur
49、nace is restarted after shutdown. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-11595E(AR)TABLE II. Sampling for impact resistance testing. Schedule Batch Furnace Continuous Furnace A One bar or blank from each One bar or blank at start of quench lot for three conexecutive quench lots from each heat-treat furnace used. operation. Three bars or blanks from each 1,000 bars or
