1、MIL-DTL-qb177C = 99Ob 2075746 bb MI L-DTL- 4 61 7 7 C (MR) SUPERSEDING MIL-A-46177B (MR) 24 October 1998 19 October 1990 DETAIL S P ECI FI CATI ON ARMOR, STEEL PLATE AND SHEET, WROUGHT, HOMOGENEOUS (1/8 TO LESS THAN 1/4 INCH THICK) This specification is approved for use by the U.S. Army Research Lab
2、oratory, Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers wrought-steel homogeneous plate and sheet from 1/8 to less than 1/4 inch inclusive in thickness (see 6.2). 2. APPLICABLE DOCUMENTS 2.1
3、 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completenes
4、s of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, an
5、d handbooks form a part of this document to the extent specified herein. Unless otherwise 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 the solicitation (see 6.2). ST
6、ANDARDS DEPARTMENT OF DEFENSE MIL-STD-662 V50 Ballistic Test for Armor (Unless otherwise indicated, copies of the above specifications, standards, and handbooks are available from the Defense Automated Printing Service (DAPS), Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) Beneficial
7、 comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Director, U.S. Army Research Laboratory, Weapons and Materials Research Directorate, ATTN: AMSRL-WM-M, Aberdeen Proving Ground, MD 21005-5069 by using the S
8、tandardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. I I FSC 9515 AMSC N/A Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - MIL-DTL-4bL77C = 9999906 2075747 5T5 MIL-DTL-4 6177C (MR) 2.3 Non
9、-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise Specified, the issues o
10、f 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 A751 ASTM E10 ASTM E18 ASTM E23 ASTM E110 ASTM E290 Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Produc
11、ts (DoD adopted) Brinell Hardness of Metallic Materials (DoD adopted) Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials (DoD adopted) Notched Bar Impact Testing of Metallic Materials (DoD adopted) Indentation Hardness of Metallic Materials by Portable Hardness Testers (DoD ad
12、opted) Bend Testing of Material for Ductility (DoD adopted) ASTM E1417 Liquid Penetrant Examination (DoD adopted) ASTM E1444 Magnetic Particle Examination (DoD adopted) (Application for copies should be addressed to the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshoho
13、cken, PA 19428-2959.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been
14、obtained. 3. REQUIREMENTS 3.1 First article. When specified in the contract or purchase order (see 4.2.1.1.2 and 6.21, a sample or samples of the specified item shall be made available to the contracting officer or his authorized representative for approval in accordance with 4.2.1.1. authorizes the
15、 commencement of shipment but does not relieve the supplier of responsibility for compliance with all applicable provisions of this specification. The first article samples and test plates shall be manufactured by the process proposed for use on production armor. chemical analysis must be submitted
16、to the contracting agency and to the ballistic test agency. The ballistic test agency shall record the test results of the first article ballistic test plates submitted, showing the dates tested. The approval of the first article samples The manufacturers declared 3.1.2 Potential suppliers. Potentia
17、l suppliers wishing to qualify to this specification should follow the instructions in 6.6. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-DTL-46177C W 9999906 2075748 431 MIL-DTL-4 6177C (MR) 3.2 Acceptance requirements. 3.2.1 Materials. 3.2
18、.1.1 Structure. Processes of manufacture shall be such as to produce steel plate having, as nearly as practicable, a homogeneous structure throughout. 3.2.2 Chemical composition. The heat analysis of all plates within a heat shall conform to the requirements of table I unless otherwise negotiated be
19、tween the steel supplier and the contractor. In addition, those additives or hardening agents intentionally added shall be declared. All limits as specified in table I (including any deviations negotiated) shall be submitted in advance to the procuring activity. The contractor may establish and subm
20、it separate limits for each thickness of plate to be furnished (see 6.5). A statement showing the product analysis of each melt and complete details of the heat treatment of each lot shall be furnished to the procuring activity at no cost to the procuring activity. All elements of chemical compositi
21、on shall be shown in the statement. The chemical composition range established by the producer and the chemical analysis of the material submitted shall be reported to the procuring activity. Also, some methods of sulfide shape control shall be used. 3.2.3 Heat treatment. All plates in each lot, inc
22、luding samples, shall receive the same heat treatment except for such variations in tempering temperature as may be necessary to produce the prescribed hardness. The austenitizing temperature for production plates may vary within a range of 5O0F above the temperature used for test plates, but in no
23、case shall it exceed 1700F (see 6.4). 3.2.4 Processing controls. 3.2.4.1 Heatinq. Except for heating the plates below 45OoF, local or general heating shall not be performed after the final quenching and tempering operation unless otherwise specified in the contract or order. A detailed outline of th
24、e procedure to be used in each operation of the following processes shall be submitted in writing to the procuring activity for authorization (see 6.2). 3.2.4.1.1 Edge preparation. treatment provided the procedure is such that no cracks develop on any thermal cut edge. Thermal cutting shall be permi
25、tted after final heat 3.2.4.1.2 Repairing. Unless otherwise approved by the procuring activity, weld repairs shall not be made on any plates. When permitted, weld repair shall be done prior to hardening treatment whenever possible (see 6.2). 3.2.4.1.3 Forming. After final quenching and tempering ope
26、rations the plate material shall meet the bend test requirements as specified in 3.2.5.3. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-DTL-46177C = 9999706 2075749 378 MIL-DTL-46177C (M) . TABLE I. Chemical composition (product analysis). -
27、i/ MAXIMUM RANGE MAXIMUM LIMIT PERCENT PERCENT ELEMENT CARBON 0.10 0.30 MANGANESE: Up to 1.00%, incl. Over 1.00% 0.30 0.40 PHOSPHORUS 0.025 - SULFUR O. 015 - SILICON : Up to 0.60% incl. Over 0.60% to 1.00% incl. Over 1.00% 0.20 0.30 0.40 NICKEL 0.50 - CHROMIUM : Up to 1.25% incl. Over 1.25% 0.30 0.4
28、0 MOLYBDENUM: Up to 0.20% incl. Over 0.20% O. 07 O. 15 VANADIUM BORON COPPER TITANIUM Z I RCONIUM ALUMINUM LEAD TIN ANTIMONY ARSENIC 0.10 3/ 0.10 3/ 0.10 y 0.02 y 0.02 y 0.02 - 3/ 0.01 - i/ This table lists the maximum range for elements of the manufacturers established chemical composition. - 2/ Wh
29、en the amount of boron is specified in the alloy, its content so determined by heat analysis shall not exceed 0.003 percent. - 3/ When the amount of an element is less than 0.02 percent the analysis may be reported as 0.02 percent. 4 Provided by IHSNot for ResaleNo reproduction or networking permitt
30、ed without license from IHS-,-,-3.2.4.2 Grinding. Grinding is not required but may be performed to remove minor defects not affecting the serviceability of the material provided that, unless otherwise authorized by the procuring activity, the grinding does not result in the reduction of the plate th
31、ickness in the ground areas to less than the tolerances specified in table II. TABLE II. Thickness tolerances for ordered thickness, inches (over and under). Tolerance (inch) for width of plate Specified thickness Up to 72“ to 84“ to 96“ to 108“ to inch 72“ 84“ excl. 96“ excl. 108“ excl. 120“ incl.
32、1/8 to less than 1/4 .O16 .O16 o19 . o19 .O23 3.2.5 Mechanical properties. 3.2.5.1 Hardness. The average surface hardness of each plate including first article samples shall be within the range of Rockwell hardness (HRC) of 39 to 43 or Brinell hardness (HB) of 362 to 400 when tested in accordance wi
33、th 4.6.2. 3.2.5.2 Impact resistance. The minimum Charpy V-notch impact resistance requirement of the armor plate shall be as shown in table III. impact specimens shall be obtained in both the TL orientation (transverse to the major direction of rolling with the notch perpendicular to the plate surfa
34、ce so that the crack will propagate in the longitudinal direction) and the LT orientation (parallel to the major direction of rolling). The Charpy V-notch 3.2.5.3 Bend test. All bend test samples from a given lot shall be capable of being bent to the requirements below without cracking. Two bend tes
35、t samples shall be tested in the transverse direction per ASTM E290, at room temperature through an included angle of 90 degrees (unrestrained) to the inside radii shown below. After bending, samples shall be free of cracks as determined by either liquid penetrant inspection per ASTM E1417 or magnet
36、ic particle inspection per ASTM E1444. Plate thickness (TI Inside Radius 1/8 to 1/4 inches 4T 3.2.6 Ballistic requirements. Ballistic requirements shall be in accordance with the appendix of this specification. 3.2.7 Dimensions and tolerances. 3.2.7.1 Dimensions. Plates shall comply with the dimensi
37、ons specified on the applicable drawings or in the contract or order (see 6.2). 3.2.7.2 Thickness. The thickness tolerance of each plate, after final treatment, shall be in accordance with table II for the width specified. 1 5 Provided by IHSNot for ResaleNo reproduction or networking permitted with
38、out license from IHS-,-,-MIL-DTL-46177C 99999Ob 2075753 T2b MIL-DTL-46177C (MR) TABLE III. Minimum Charpy V-notch impact resistance requirements (at -40F f 2F). Rockwell Brinell Impact resistance Hardness (HRC) Hardness (HB) (avg. of 2 or more tests) ft-lb, average 3000-Kg load standard depth specim
39、ens average 1/2 Scale 1/4 Scale 39 3 62 9.0 4.5 40 371 8.5 4.3 42 390 8.0 4.0 43 4 O0 7.5 3- 8 3.2.7.3 Flatness. Unless otherwise specified in the contract or order (see 6.2), the flatness tolerance of each plate shall be within the requirements specified in table IV. Other tolerance requirements ma
40、y be specified in the contract or order and shall be as agreed upon between the contractor and the procuring activity. TABLE IV. Permissible variations for flatness. Specified Variations from a flat surface for specified widths, in. thickness up to 60 to 72 and inch 60 excl 7.2 excl over Up to 1/4,
41、excl 0.5 0.75 1.0 NOTE 1: Flatness tolerances for length. The longer dimensions specified is considered the length and variations from a flat surface along the length should not exceed the tabular amount for the specified width in plates up to 12 ft in length, or in any 12 ft or longer plates. NOTE
42、2: Flatness tolerance for width. The flatness variation across the width should not exceed the tabular amount for the specified width. 3.2.7.4 Waviness. Unless otherwise specified in the contract or order (see 6.21, the waviness tolerance of each plate shall be within the requirements of table V. 3.
43、2.8 Identification marking. Identification marking and records shall be such as to ensure positive identification of all plates, including test samples and specimens, with the lot and corresponding heat from which they were produced. The key to identification symbols shall be furnished to the inspec
44、tor prior to submittal for inspection. First article and acceptance ballistic test plates shall also be marked with the manufacturers name or trademark, the number of this specification, and the ordered plate thickness in inches. First article plates shall be marked “PRE,“ acceptance plates “ACC“ an
45、d retest plates will be marked “Rl“ and “R2.“ If a second set of retest plates are submitted they shall be marked “RR1“ and “RR2.“ The marking shall be legibly stenciled or marked with indelible ink and located along the edge with the lifting hole. plate rolling direction shall be identified. The pr
46、imary 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-46177C m 7999906 2075752 b2 MIL-DTL-46177C (MR) # TABLE V. Waviness tolerance for plates, inch. Flatness tolerance When number of waves in 12 ft is: fromtable IV 1 2 3 4 5 6 7 1/2 0.50 0
47、.375 0.3125 0.1875 0.1875 0.1250 0.0625 3/4 0.75 0.5625 0.4375 0.3125 0.2500 0.1875 0.1250 1 1.00 0.7500 0.5625 0.4315 0.3125 0.2500 0.1875 NOTE 1: Waviness denotes the deviation of the top or bottom surface from horizontal line, when the plate is resting on a flat surface, as measured in an increme
48、nt of less than 12 ft of length. The waviness tolerance is a function of the flatness tolerance as obtained from table IV. Note 2: When the flatness tolerance is 1/2 inch or less for plates up to 1/4 inch or less in thickness, the waviness tolerance shall not apply. 3.2.9 Information required. A rep
49、ort showing the complete details of the heat treatment of each lot shall be furnished to the procuring activity. A certification of the chemical composition of the steel shall be furnished with the ballistic test plates. shown, including special additives or hardening agents, whether shown in table I or not. The method of sulfide shape control shall be reported. Hardness test results for each plate and impact test results for each lot shall be includ
