1、- . Beneficial 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
2、by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. d 9999906 2074627 939 INCH-POUND MIL-DTL-4 6193A (MR) 9 October 1998 SUPERSEDING MIL-A-46193 (MR) 31 August 1988 DETAI L S PECI FI CATI ON ARMOR PLATE, CONTROL ROLLED, STEEL,
3、 WROUGHT, HIGH STRENGTH, HIGH QUALITY This specification is approved for use by the U.S. Army Research Laboratory, 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 materials requirements for c
4、ontrol rolled, quenched and tempered high strength wrought steel armor plate for lightweight armor applications up to and including 1/22 inches in thickness (see 6.2). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. T
5、his 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 completeness of this list, document users are cautioned that they must meet all specified requirements documents cit
6、ed 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, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the
7、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). STANDARDS DEPARTMENT OF DEFENSE MIL-STD-662 V50 Ballistic Test for Armor (Unless otherwise indicated, copie
8、s 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.) AMSC N/A FSC 9515 Licensed by Information Handling Services = 9999906 2074628 875 MIL-DTL-4 6193A (MR) . 2.3 Non-Go
9、vernment 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.1isted in the issue of the DoDICC cited in the solicitation. Unless otherwise specified, the issues of d
10、ocuments 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 Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products (DoD adopted) ASTM E10 Brinell Hardness of Meta
11、llic Materials (DoD adopted) ASTM E18 Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials (DoD adopted) ASTM E23 Notched Bar Impact Testing of Metallic Materials (DoD adopted) (Application for copies should be addressed to the American Society for Testing and Materials, 100 Bar
12、r Harbor Drive, West Conshohocken, 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
13、 specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified in the contract or purchase order (see 6.2) and before production has commenced, samples. of the specified item shall be made available to the contracting officer or his authorized representative for approval in
14、 accordance with 4.2.1.1. The approval of the first article samples authorizes the commencement of production but does not relieve the supplier of responsibility for compliance with all applicable provisions of this specification. The first article samples shall be manufactured by the process propos
15、ed for use on production. 3.1.1 Potential suppliers. Potential suppliers wishing to qualify to this specification should follow the instructions in 6.4. 3.1.2 Change in mill processing. with the requirements of this specification, any deliberate change in the mill processing by the manufacturer shal
16、l be drawn to the attention of the procuting activity and the contractor. If the material processing is changed, the first article tests of this specification may be again called upon to assure compliance with the requirements of this specification. After an armor material has successfully complied
17、3.2. Acceptance requirements. 3.2.1 General material requirements. Material shall be produced by open hearth, basic oxygen furnace, or electric furnace. 3.2.1.1 Condition. Plates shall be in the as tempered condition. Flame cutting or pickling of the surfaces is not permitted, however abrasive wheel
18、 cutting is permitted (see 6.2). 3.2.1.2 Formulation. 3.2.1.2.1 Chemical composition. The chemical composition shall conform to table I. In addition, those additives which are hardening agents intentionally added shall be declared and must meet with the approval of the procuring activity. Also, some
19、 methods of sulfide shape control shall be used. 2 Licensed by Information Handling Services W 9999906 2074b29 701 MIL-DTL- 4 6 19 3A (MR) TABLE I. Chemical composition (ladle analysis). ELEMENT RANGE PERCENT Carbon .37 to .40 Manganese Phosphorous Sulfur Silicon Nickel Copper Molybdenum Aluminum Re
20、sidual Elements * Boron Nitrogen .50 to -70 .O14 max ,007 max 1.15 to 1.45 5.30 to 5.60 .85 to 1.10 .40 to .60 .O2 to .O8 .O025 max ,012 max Elements not intentionally added. 3.2.1.2.2 Rolling criteria. Hot shearing of slabs followed by slow cooling is recommended. All starting slab material shall b
21、e heated to 1700F f 25F. For all final gages the slab thickness must allow for a minimum of 85 percent reduction. A slab to plate finishing rolling temperature shall not be lower than 1350F. A slab to plate reduction of 10 to 20 percent per pass is recommended along with air cooling and/or spray que
22、nching of top and bottom of oscillating material. 3.2.2 Heat treatment. All plates in each lot, including samples, shall receive the same tempering. Local or general heating shall not be performed after final tempering operation (see 6.2). All plates shall be tempered at a temperature of at least 32
23、5F + 25F for a total of 30 minutes after the center line of the plate reaches 325F. Since material made to this specification may develop stress cracks it is recommended that all plates be tempered immediately after quenching. 3.2.3 Mechanical properties. 3.2.3.1 Hardness. The Brinell hardness of ea
24、ch plate including first article samples shall not be below 496 HB. The diameters of Brinell hardness impressions on any individual plate shall not vary by more then 0.15 mm and in accordance with ASTM Elo. For plates less than 3/16 inches in thickness a Rockwell C hardness test shall be substituted
25、 for HB tests. Tests shall be conducted in accordance with ASTM E18 and the readings shall be converted to HB. Hardness readings shall be taken on opposite corners (or opposite ends) of an individual plate (see 4.4.2.2 and 4.6.2.1.2). 3.2.3.2 Impact resistance. as determined by the average of two or
26、 more specimens in accordance with ASTM E23, shall be as shown in table II. The Charpy V-notch impact specimens shall be obtained in both the TL orientation, which is transverse to the major direction of rolling, with the notch perpendicular to the plate surface so that the crack will propagate in t
27、he longitudinal direction and the LT orientation, which is parallel to the major direction of rolling. The dnimum Charpy V-notch impact energy of the plate, TABLE II. Minimum Charpy V-notch impact energy in ft-lb at -40F f 2F for standard or sub-size specimens. Impact energy for standard depth speci
28、mens but with the following width (Average of two or more tests), ft-lb Specimen orient a ti on Standard width 3/4 width 1/2 width 1/4 width Transverse (T-L) 10. o 7.5 5.0 2.5 Longitudinal (L-T) 12.0 9.0 6. O 3. O 3 Licensed by Information Handling ServicesW 9999906 2074b30 423 M 3.2.4 Ballistic req
29、uirements. Ballistic requirements shall be in accordance with the appendix of this specification. 3.2.5 Dimensions and tolerances. 3.2.5.1 Dimensions. Plates shall comply with the dimensions specified in the applicable drawings or in the contract or order (see6.2). 3.2.5.2 Thickness. The thickness t
30、olerance of each plate, after final treatment, shall be in accordance with table III for the thickness specified. 3.2.5.3 Flatness. Unless otherwise specified in the contract or order (see 6.21, the flatness tolerance of each plate shall be within the requirements specified in table IV. Tighter tole
31、rance requirements may be specified in the contract or order and shall be as agreed upon between the contractor and the procuring activity. 3.2.5.4 Waviness. Unless otherwise specified in the contract or order (see 6.2), the waviness tolerance of each plate shall be within the requirements of table
32、V. TABLE III. Thickness tolerances for ordered thickness, inches (over and under). - i/ Tolerance (inch) for width of plate Specified 72“ to 84“ to 96“ to 108“ to 120“ to 132“ to Thickness up to 84“ 96“ 108“ 120“ 132“ 144“ (Inches ) 72“ excl. excl. excl. excl. excl. excl. 1/8 .O16 .O16 ,019 . o19 .O
33、23 3/16 .O16 .O16 . o19 . o19 .O23 1/4 . O16 .O16 .O19 .O19 .O23 5/16 .O16 . o19 . o19 . o19 .O23 .O26 - 3/8 . O16 . o19 . o19 .O23 -023 .O26 - 7/16 .O16 . o19 . o19 .O23 .O26 .O26 .O31 1/2 .O16 . o19 . o19 .O23 .O26 .O26 .O31 - i/ - - - - - - For intermediate thickness, the tolerance of the closer
34、specified gage shall apply. 4 Licensed by Information Handling Servicesh d c 4 Y m cn d W ji I i m r2 I ul m al c U ri W m Q 5 5 LI W (II -.-I U 4 . -4 Li al ri A -.-I rn m -4 al nl E s 5 H W d m C -4 . m c o a 4 3 T m -4 W 4 u a, U O W Q u m y.( u m U rd d W m 5 u W m C O -4 U -I u m 3 q. rpd orl u
35、 nix doa, o O. nid wrl u ox rioal U w. Ori rlu ax mow U Wd mu $ 9b 2074633 3bT W ni- riri rlnill rlrl Io mrlm Fari rlrlri rll I I O00 OUUU L1 rl a, c, O z a al aJ U X a, U O C ?i 2 5 c 111 a -4 3 a, s ci (II m O u U Ca c O -4 U -4 4 m $ m u). aJc CU o-0 w Wal c -4 Hw 4 lu al ea Om a -4 al 4 ou wo w
36、u) a, uc 2 -2 35 $2 Qi5 li o4 om d ws u)A um CO o ma, ris hU ni a, c, O z -4 +i mo e m a Wri ali7 alo uc xm al c u0 o 4 CU m a a4 44 3m O? c Wal c. COG oc, -4 a O -I ad 3 -4 u u Ca .w $ .4 : CQ, -4 o 2 UY ?Gal c uuo aJW e ew CU0 om cn al luP CI) al ci O z Licensed by Information Handling ServicesTAB
37、LE V. Waviness tolerances for plates. Flatness tolerance When number of waves in 12 ft is: table IV from 1 2 3 4 5 6 7 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16 1 1-1/8 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/8 2-1/4 2-3/8 2-1/2 2-5/8 2-3/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8
38、 15/16 1 1-1/8 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/8 2-1/4 2-3/8 2-1/2 2-5/8 2-3/4 1/4 5/16 5/16 3/ 8 7/16 1/2 1/2 9/16 5/8 11/16 11/16 3/4 7/8 15/16 1-1/16 1-1/8 1-1/4 1-5/16 1-7/16 1-1/2 1-5/8 1-11/16 1-13/16 1-7/8 2 2-1/16 3/16 3/16 1/4 5/16 5/16 3/ 8 3/ 8 7/16 7/16 1/2 1/2 9/16 5/8 11/16 3
39、/4 7/8 15/16 1 1-1/16 1-1/8 1-3/16 1-1/4 1-5/16 1-7/16 1-1/2 1-9/16 i/ 8 3/16 3/16 3/16 1/4 1/4 5/16 5/16 5/16 3/ 8 3/ 8 7/16 1/2 1/2 9/16 5/8 11/16 3/4 13/16 7/8 7/8 15/16 1 1-1/16 1-1/8 1-1/8 1/8 1/8 1/8 3/16 3/16 3/16 3/16 1/4 1/4 1/4 5/16 5/16 3/ 8 3/ 8 7/16 1/2 1/2 9/16 9/16 5/ 8 11/16 11/16 3/
40、4 13/16 13/16 7/8 1/16 1/16 1/8 1/8 1/8 1/8 3/16 3/16 3/16 3/16 3/16 3/16 1/4 5/16 5/16 3/ 8 3/ 8 7/16 7/16 1/2 1/2 9/16 9/16 9/16 5/8 5/8 1/16 1/16 1/16 1/16 1/8 1/8 1/8 1/8 1/8 1/8 3/16 3/16 3/16 1/4 1/4 1/4 5/16 5/16 5/16 3/8 3/8 3/8 7/16 7/16 7/16 1/2 NOTE 1: Waviness denotes the deviation of th
41、e top or bottom surface from a horizontal line, when the plate is resting on a flat surface, as measured in an increment 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
42、 plate thickness 1/2 inch and under, the waviness tolerance shall not apply. 3.2.6 Surface and internal soundness. Unless otherwise specified in the contract or purchase order (see 6.21, all plates shall be free from laminations, cracks, seams, laps and other imperfections which would adversely affe
43、ct the strength, fabricability or ballistic performance of the armor. 3.2.7 Identification marking. Identification marking shall be legibly painted and records shall be such as to ensure positive identification of all plates, including test samples and specimens, with the lot and corresponding heat
44、from which they were produced. Traceability of plates from first to last in each lot shall be maintained. 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 ord
45、ered plate thickness in inches. First article plates shall be marked “PRE“, acceptance plates “ACC“, and retest plates will be marked “Rl“ and “FQ“. If a second set of retest plates are submitted they shall be marked lIm1 Il and llm Il . The key to identification symbols shall be furnished to the in
46、spector The primary plate rolling direction shall be identified. 6 Licensed by Information Handling ServicesH 9999906 2074633 132 3.2.8 Workmanship. All plates shall be free from scale, pits, tears, folds and other surface imperfections which are of such a nature as to affect the fabricability or se
47、rviceability of the material. 3.2.9 Information Required. A report 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. All elements of
48、the chemical composition shall be shown, including special additives or hardening agents, whether shown in table I or not. The method of sulfide shape control shall be reported. Hardness results for each plate and impact results for each lot shall be included in the report (see 6.2). 3.2.10 Ballisti
49、c test plate information. A property executed armor data report shall be submitted containing the information as specified in MIL-STD-662. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order (see 6.21, the contractor is responsible for the performance of all inspection requirements -(examinations and tests-) as specified heiein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance
