1、* MIL-DTL-13823D 9999906 2077085 817 Beneficial comments (recommendations, additions, deletions) and any pertinent data which ma.y 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, Aberd
2、een Proving Ground, MD 21005-5069 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. I I INCH-POUND I I MIL-DTL-1382 3D (MR) 19 November 1998 SUPERSEDING MIL- S- 13 8 2 3C (MR) 4 March 1991 DETAI L S PEC I FI CAT ION STEEL: S
3、HAPES, ROLLED OR FORGED; BARS, FLATS AND SPECIAL SECTIONS (FOR ARMOR) This specification is approved for use by the U.S. Amy 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 cove
4、rs weldable steel bars, flats and special sections produced from billets to specified dimensions by rolling or forging, for armored vehicle components. 1.2 Classification. The steel should be of the following shapes and sizes as specified (see 6.2): a. Bars, round: 1/4 inch up to and including 4 inc
5、h diameter. b. Bars, square: 1/4 inch up to and including 4 inch. c. Flats, 1/4 inch or more in thickness: Not over 6 inches wide. d. Shapes of special sections: In accordance with applicable drawings. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in section
6、s 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 completeness of this list, document users are cautioned that they must meet all sp
7、ecified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Non-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
8、adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation (see 6.2). AMSC N/A AREA FORG Provided by IHSNot for ResaleNo reproduction or networki
9、ng permitted without license from IHS-,-,-MIL-DTL-13823D 999990b 2077086 753 0 MIL-DTL- 13823D (MR) I 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 Metal
10、lic Materials (DoD adopted) ASTM E23 Notched Bar Impact Testing of Metallic Materials (DoD adopted) ASTM E381 Macroetch Testing Steel Bars, Billets, Blooms, and Forgings (DoD adopted) (Application for copies should be addressed to the American Society for Testing and Materials, 100 Barr Harbor Drive
11、, West Conshohocken, PA 19428-2959.) 2.3 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 exem
12、ption has been obtained. 3. REQUIREMENTS 3.1 General requirements. Steel shapes shall be in accordance with the applicable drawings, the requirements of this specification, and all referenced documents. Any conflicts are to be resolved by means of the order of precedence (see 2.3). 3.2 First article
13、. The contractor shall submit a first article sample unless it is specifically waived in the contract (see 4.3, 6.2, and 6.3). No first article requirements shall be waived without review and approval by the procuring contracting officer (see 6.4). 3.2.1 First article residual metal. Residual metal
14、from the first article units shall be retained until the acceptance of the first article (see 6.2). 3.3 Chemical composition. The heat analysis of all heats shall be within the limits established by the supplier, and shall conform to the requirements of table I. In addition, those additives or harde
15、ning agents intentionally added shall be declared. Ail limits established by the supplier shall be submitted in advance to the procuring contracting officer. submit separate limits for each thickness of armor to be furnished. The supplier may establish and 3.3.1 Carbon (product analysis). The carbon
16、 content determined by product analysis shall be limited as follows: 0.32 percent for bars and flats up to 4 inches thick inclusive and 0.34 percent for flats or special sections over 4 inches thick. 3.4 Heat treatment. The supplier shall select the heat treatment of the material to meet the require
17、ments of this specification. A statement of the heat treatment to be used shall be submitted to the procuring contracting officer. All bars, flats or special sections in each lot, including samples, shall receive the same heat treatment except for such variations in tempering temperature as may be n
18、ecessary to produce the prescribed hardness. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-13823D 7799906 2077087 b7T = 3.5 Heating. Except as provided elsewhere in this specification, local or general heating shall not be performed after
19、 final quenching and tempering. A detailed outline of the procedure to be used in each operation of the following processes shall be submitted in writing to the procuring contracting officer fOK authorization (see 6.2). TABLE I. Chemical composition (heat analysis). Maximum range Maximum Limit Eleme
20、nt ( Fe I cent 1 (Percent) Carbon .10 .32 1.34 Manganese: Up to 1.00% incl. Over 1.00% Phosphorus Sulfur Sil i con : Up to 0.60% inc. Over 0.60% to 1.00% incl. Over 1.00% .30 .40 .20 .30 .40 Nickel .so Chromium: Up to 1.25% incl. Over 1.25% Molybdenum: Up to 0.20% incl. Over 0.20% .30 .40 .O7 .15 Va
21、nadium .10 .O4 . o4 3.5.1 Oxygen cutting. Unless otherwise specified (see 6.2), oxygen cutting shall be permitted after final heat treatment provided the procedure is such that no cracks capable of being observed with the unaided eye develop on any oxygen-cut edge. 3.5.2 Repairing. Weld repairs shal
22、l be made only when specifically authorized by the procuring contracting officer. 3.5.3 Hot forming. Unless otherwise authorized by the procuring activity, hot forming after the final quenching and tempering operations shall not be performed. 3.6 Quality. The quality and cleanliness of bars or forgi
23、ng stock up to and including 64 square inches in cross sectional area shall be equal to OK better than macrographs S4, R2 and C3 shown in ASTM E381. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL- 13823D (MR) 3.7 Production weldability. Th
24、e steel bars, flats, or special sections shall be capable of being welded by production welding methods as demonstrated by preparation, for approval by the procuring contracting officer, of samples representing typical production weldments for the intended application. This requirement may be waived
25、 at the discretion of the procuring contracting officer upon receipt and approval of the production welding characteristics of the type of steel involved. 3.8 Mechanical properties. 3.8.1 Hardness. The average surface hardness of a minimum of four hardness tests per furnace load shall be within the
26、range shown in table II for the applicable thickness. The diameters of Brinell hardness impressions determined on the surface of any bar, flat, special section or sample shall not vary by more than 0.15 mm respectively between the maximum and minimum values. hardness tests shall be conducted on impa
27、ct samples 4 inches or greater in thickness, the average of all hardness tests, both surface and cross-section, shall be within f 0.05 m of the range specified for the thickness involved. Cross-sectional TABLE II. Brinell hardness requirements. Brinell Brinell Specified nominal thickness of hardness
28、 range indentation bar, flat or special section (inches) (3000 kg load) diameters (mm) 1/4 to less than 1/2 1/2 to less than 3/4 3/4 to less than 1 1/4 1 1/4 to less than 2 2 to less than 4 4 to 6 incl. 341-388 331-315 321-315 293-331 269-311 241-277 3.30-3.10 3.35-3.15 3.40-3.15 3.55-3.35 3 .l-3.45
29、 3.90-3.65 3.8.2 Impact resistance. The V-notch Charpy impact resistance shall meet the requirements of table III for the applicable hardness and thickness. 3.9 Dimensions and dimensional tolerances. 3.9.1 Dimensions. Bars, flats, and special sections shall comply with the dimensions shown on the dr
30、awings or specified in the contract or order. 3.9.2 Tolerance. The thickness of any bar or flat, after final heat treatment, shall not vary by more than the amounts shown in table IV. Tolerances for special sections shall be as specified in the contract or purchase order. 3.10 Identification. Identi
31、fication markings and records shall be such as to ensure positive identification of all bars, flats and special sections, samples and specimens, with the lot and corresponding heat from which they were produced. The key to identification symbols shall be furnished to the inspector prior to submittal
32、 of material for inspection and testing. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ci m (v 03 m r( I J I3 ci I J H H H H ul al c m a al- rial -IF oa LI& fd a, u Ca m- z P u O Li w al 5: U c -.-i . m w al c X m m aJ c a c rl 4 al c 4 u 2 m MIL
33、-DTL-L3823D m 999990b 2077089 462 m c al U al P m al N rl v1 I Q 3 m c al u aJ Ei 5 Ff E d b c rd ci rn c al u al Ei Ff al N 4 w I Q 3 rn d 4 U ar LI u1 E 2 m U I: m U rn O U w Il 4 U c -i ID O ci w Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL
34、-DTL-13823D M 9999906 2077090 184 e MIL-DTL- 13 82 3D (MR) TABLE IV. Dimensional tolerances for bars (round and square) and flats. Specified thickness, diameter or width Permissible variations Greater Out of round than To and including Plus Minus or square (Inches ) (Inches) (Inch) (Inch) (Inch) 3/1
35、6 5/16 O. 005 0.005 O. 008 5/16 7/16 O. 006 0.006 o. O09 7/16 5/ 8 O. 007 0.007 o. O10 5/ 8 7/8 O. 008 0.008 o. 012 7/8 1 o. O09 0.009 O. 013 1 1-1/8 0.010 o. O10 O. 015 1-1/8 1-1/4 o. o11 0.011 0.016 1-1/4 1-3/8 0.012 o. 012 O. 018 1-3/8 1-1/2 O. 014 0.014 0.021 1-1/2 2 1/64 1/64 0.023 2 2-1/2 1/32
36、 O O. 023 2-1/2 3-1/2 3/64 O 0.035 3-1/2 4-1/2 1/16 O 0.046 4-1/2 5-1/2 5/64 O 0.058 5-1/2 6-1/2 1/8 O 0.070 6-1/2 8-1/4 5/32 O 0.085 3.11 Information required. A statement showing the heat analysis of each heat and complete details of the heat treatment of each lot shall be furnished for the files
37、of the procuring activity. composition shall be shown in the statement, including special additives or hardening agents, whether shown in table I or not. All elements of the chemical 3.12 Workmanship. Bars, plates, and special sections shall be free from injurious imperfections, including cracks, pi
38、ts, porosity, laminations, segregation, and inclusions, for their intended use. 4. VERIFICATION 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) a
39、s specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform
40、 any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items shall meet all requirements of sections 3 and 5. The inspection set forth in this spe
41、cification shall become a part of the contractors overall inspection system or quality program. absence of any inspection requirements in the specification shall not relieve the 6 The Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-DTL-13823D 99
42、99906 2077091 010 MIL-DTL-13 8Z3D (MR) 4 contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertai
43、n conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follow
44、s: a. First article inspection (see 4.3) b. Quality conformance inspection (see 4.4) 4.3 First article inspection. 4.3.1 For visual examination. Unless a sampling plan is specified by the procuring contracting officer, all bars, flats or special sections comprising the lot shall be subject to visual
45、 inspection. 4.3.2 For chemical analysis. One sample shall be selected from each heat in accordance with ASTM A751. 4.3.3 For steel quality. Unless otherwise specified (see 6.2), samples for steel quality tests shall be taken representing the top, middle and bottom of the first, middle and last usab
46、le ingots of each heat. Samples shall be sufficiently large to prepare test specimens required in 4.5.1.2. 4.3.4 For production weldability. When required, the number and size of samples shall be as specified or approved by the procuring contracting officer. 4.3.5 For mechanical properties. Samples
47、for mechanical properties tests shall be taken at random in accordance with the contract or purchase order (recommendations are in 6.2.1). Mechanical property samples shall be of the same thickness or diameter as the bars, flats, or special sections they represent. The samples shall be either as lar
48、ge as the parts represented or shall be of sufficient size to allow for the number of specimens required in 4.5.1.3.2 to be taken from them. All specimens shall be taken so that every part of the test specimen will be outside of the heat affected zone of any oxygen cut edge. 4.4 Examination. 4.4.1 V
49、isual. Bars, flats, or special sections selected in accordance with 4.3.1 shall be visually examined for compliance with identification marking (see 3.10) and workmanship (see 3.12) . 4.4.2 Dimensional. Bars, flats or special sections selected in accordance with 4.3.1 shall be dimensionally examined for compliance with dimensions and tolerances (see 3.9) . 4.4.3 Preparation for shipment. Examination shall be made to determine compliance with the requirements for
